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arXiv 2020年

作者： Arnaud, M. Ettori, S. Pratt, Gabriel W. Rossetti, M. Eckert, D. Gastaldello, F. Gavazzi, R. Kay, S.T. Lovisari, L. Maughan, B.J. Pointecouteau, E. Sereno, M. Bartalucci, I. Bonafede, A. Bourdin, H. Cassano, R. Duffy, R.T. Iqbal, A. Maurogordato, S. Rasia, E. Sayers, J. Andrade-Santos, F. Aussel, H. Barnes, D.J. Barrena, R. Borgani, S. Burkutean, S. Clerc, N. Corasaniti, P.-S. Cuillandre, J.-C. de Grandi, S. de Petris, M. Dolag, K. Donahue, M. Ferragamo, A. Gaspari, M. Ghizzardi, S. Gitti, M. Haines, C.P. Jauzac, M. Johnston-Hollitt, M. Jones, C. Kéruzoré, F. LeBrun, A.M.C. Mayet, F. Mazzotta, P. Melin, J.-B. Molendi, S. Nonino, M. Okabe, N. Paltani, S. Perotto, L. Pires, S. Radovich, M. Rubino-Martin, J.-A. Salvati, L. Saro, A. Sartoris, B. Schellenberger, G. Streblyanska, A. Tarrío, P. Tozzi, P. Umetsu, K. van der Burg, R.F.J. Vazza, F. Venturi, T. Yepes, G. Zarattini, S. AIM CEA CNRS Université Paris-Saclay Université Paris Diderot Sorbonne Paris Cité Gif-sur-YvetteF-91191 France INAF Osservatorio di Astrofisica e Scienza dello Spazio via Pietro Gobetti 93/3 Bologna40129 Italy INFN Sezione di Bologna viale Berti Pichat 6/2 BolognaI-40127 Italy INAF IASF-Milano via A. Corti 12 MilanoI-20133 Italy Department of Astronomy University of Geneva ch. d'Écogia 16 VersoixCH-1290 Switzerland CNRS Sorbonne Université UMR 7095 Institut d'Astrophysique de Paris 98 bis Boulevard Arago Paris75014 France Jodrell Bank Centre for Astrophysics Department of Physics and Astronomy School of Natural Sciences The University of Manchester ManchesterM13 9PL United Kingdom Center for Astrophysics | Harvard & Smithsonian 60 Garden Street CambridgeMA02138 United States HH Wills Physics Laboratory University of Bristol Tyndall Ave BristolBS8 1TL United Kingdom IRAP Université de Toulouse CNRS CNES UPS 9 av du colonel Roche BP44346 Toulouse Cedex 431028 France Dipartimento di Fisica e Astronomia Universitá di Bologna Via Gobetti 92/3 Bologna40121 Italy INAF Istituto di Radio Astronomia Via Gobetti 101 Bologna40129 Italy Hamburger Sternwarte Gojenbergsweg 112 Hamburg21029 Germany Università degli studi di Roma Tor Vergata via della ricerca scientifica 1 Roma00133 Italy Université Côte d'Azur Observatoire de la Côte d'Azur CNRS Laboratoire Lagrange Nice France INAF - Osservatorio Astronomico di Trieste via Tiepolo 11 TriesteI-34131 Italy IFPU - Institute for Fundamental Physics of the Universe via Beirut 2 Trieste34151 Italy California Institute of Technology PasadenaCA91125 United States Department of Physics Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology CambridgeMA02139 United States C/ Vía Láctea s/n La Laguna TenerifeE-38205 Spain Universidad de La Laguna Departamento de Astrofísica C/ Astrofísico Francisco Sánchez s/n La Laguna TenerifeE-38206 Spain D

The Cluster HEritage project with XMM-Newton - Mass Assembly and Thermodynamics at the Endpoint of structure formation (CHEX-MATE) is a three-mega-second Multi-Year Heritage programme to obtain X-ray observations of a minimally-biased, signal-to-noise-limited sample of 118 galaxy clusters detected by Planck through the Sunyaev-Zeldovich effect. The programme, described in detail in this paper, aims to study the ultimate products of structure formation in time and mass. It is composed of a census of the most recent objects to have formed (Tier-1: 0.05 14 M 500 14 M), together with a sample of the highest mass objects in the Universe (Tier-2: z 500 > 7.25 × 1014 M). The programme will yield an accurate vision of the statistical properties of the underlying population, measure how the gas properties are shaped by collapse into the dark matter halo, uncover the provenance of non-gravitational heating, and resolve the major uncertainties in mass determination that limit the use of clusters for cosmological parameter estimation. We will acquire X-ray exposures of uniform depth, designed to obtain individual mass measurements accurate to 15 − 20% under the hydrostatic assumption. We present the project motivations, describe the programme definition, and detail the ongoing multi-wavelength observational (lensing, SZ, radio) and theoretical effort that is being deployed in support of the project. Copyright © 2020, The Authors. All rights reserved.

关键词： Thermodynamics

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Orthogonal matrix retrieval in cryo-electron microscopy

Orthogonal matrix retrieval in cryo-electron microscopy

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IEEE International Symposium on Biomedical Imaging

作者： Tejal Bhamre Teng Zhang Amit Singer Program in Applied and Computational Mathematics Princeton University Princeton NJ USA

In single particle reconstruction (SPR) from cryo-electron microscopy (EM), the 3D structure of a molecule needs to be determined from its 2D projection images taken at unknown viewing directions. Zvi Kam showed already in 1980 that the autocorrelation function of the 3D molecule over the rotation group SO(3) can be estimated from 2D projection images whose viewing directions are uniformly distributed over the sphere. The autocorrelation function determines the expansion coefficients of the 3D molecule in spherical harmonics up to an orthogonal matrix of size (2l+1)×(2l +1) for each l = 0, 1, 2, · · ·. In this paper we show how techniques for solving the phase retrieval problem in X-ray crystallography can be modified for the cryo-EM setup for retrieving the missing orthogonal matrices. Specifically, we present two new approaches that we term Orthogonal Extension and Orthogonal Replacement, in which the main algorithmic components are the singular value decomposition and semidefinite programming. We demonstrate the utility of these approaches through numerical experiments on simulated data.

关键词： Three-dimensional displays Image reconstruction Covariance matrices Microscopy Crystallography Noise measurement Matrix decomposition

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Packed ultra-wideband mapping array (PUMA∗): A radio telescope for cosmology and transients

arXiv

引用

arXiv 2019年

作者： Slosar, Anže Ahmed, Zeeshan Alonso, David Amin, Mustafa A. Ansari, Réza Arena, Evan J. Bandura, Kevin Battaglia, Nicholas Blazek, Jonathan Bull, Philip Castorina, Emanuele Chang, Tzu-Ching Connor, Liam Davé, Romeel Dvorkin, Cora van Engelen, Alexander Ferraro, Simone Flauger, Raphael Foreman, Simon Frisch, Josef Green, Daniel Holder, Gilbert Jacobs, Daniel Johnson, Matthew C. Dillon, Joshua S. Karagiannis, Dionysios Kaurov, Alexander A. Knox, Lloyd Liu, Adrian Loverde, Marilena Ma, Yin-Zhe Masui, Kiyoshi W. McClintock, Thomas Meerburg, Pieter D. Moodley, Kavilan Münchmeyer, Moritz Newburgh, Laura B. Ng, Cherry Nomerotski, Andrei O'Connor, Paul Obuljen, Andrej Padmanabhan, Hamsa Parkinson, David Xavier Prochaska, J. Rajendran, Surjeet Rapetti, David Saliwanchik, Benjamin Schaan, Emmanuel Sehgal, Neelima Richard Shaw, J. Sheehy, Chris Sheldon, Erin Shirley, Raphael Silverstein, Eva Slatyer, Tracy Slosar, Anže Stankus, Paul Stebbins, Albert Timbie, Peter T. Tucker, Gregory S. Tyndall, William Villaescusa-Navarro, Francisco Wallisch, Benjamin White, Martin Brookhaven National Laboratory SLAC National Accelerator Laboratory Menlo ParkCA94025 United States University of Oxford OxfordOX1 3RH United Kingdom Department of Physics & Astronomy Rice University HoustonTX77005 United States Université Paris-Sud LAL UMR 8607 Orsay CedexF-91898 France CNRS/IN2P3 OrsayF-91405 France Brookhaven National Laboratory UptonNY11973 United States Drexel University PhiladelphiaPA19104 United States CSEE West Virginia University MorgantownWV26505 United States Center for Gravitational Waves and Cosmology West Virginia University MorgantownWV26505 United States Cornell University IthacaNY14853 United States Observatoire de Sauverny Versoix1290 Switzerland Queen Mary University of London LondonE1 4NS United Kingdom Department of Physics & Astronomy University of the Western Cape Cape Town7535 South Africa Department of Physics University of California Berkeley BerkeleyCA94720 United States Jet Propulsion Laboratory California Institute of Technology PasadenaCA United States Anton Pannekoek Institute for Astronomy University of Amsterdam Amsterdam1098 XH Netherlands University of Edinburgh EdinburghEH8 9YL United Kingdom Department of Physics Harvard University CambridgeMA02138 United States Canadian Institute for Theoretical Astrophysics University of Toronto TorontoONM5S 3H8 Canada Arizona State University TempeAZ85287 United States Lawrence Berkeley National Laboratory BerkeleyCA94720 United States University of California San Diego San DiegoCA92093 United States Department of Physics University of Illinois at Urbana-Champaign UrbanaIL61801 United States Department of Physics and Astronomy York University TorontoONM3J 1P3 Canada Perimeter Institute WaterlooONN2L 2Y5 Canada Department of Astronomy University of California Berkeley BerkeleyCA94720 United States Dipartimento di Fisica e Astronomia "G. Galilei" Università degli Studi di Padova Padova35131 Italy Istituto Naziona

We present a concept for an ultra-wide band, high-sensitivity and low-resolution radio telescope array operating at 200 MHz-1100 MHz, which is optimized for cosmology with 21 cm intensity mapping in the post-reionization era, but also addresses other science goals amenable to such observations, including Fast Radio Bursts (FRBs), pulsar monitoring and transients as a part of multi-messenger observations. Our project is named PUMA (Packed Ultra-wideband Mapping Array) and is an evolution of the Stage II 21 cm experiment concept. This idea grew out of deliberations of the Cosmic Visions Dark Energy Committee, a Department of Energy panel tasked with investigating possible future directions for the DOE HEP program in the field of dark energy science, and more generally low-redshift survey science. In two reports [1, 2], the idea of a DOE-led 21 cm experiment was advocated, followed by the development of a concept within the 21 cm working group. This has culminated in the 21cm Roadmap document [3], which was published on the arXiv in October 2018 and submitted to the DOE. For the decadal survey, the concept has been significantly updated following new insights, mostly regarding the feasibility of the ultra-wide bandwidth feed antennas and the theoretical modelling of the expected signal. Copyright © 2019, The Authors. All rights reserved.

关键词： Ultra-wideband (UWB)

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Robust camera location estimation by convex programming

Robust camera location estimation by convex programming

引用

Conference on Computer Vision and Pattern Recognition (CVPR)

作者： Onur Özyeşil Amit Singer Program in Applied and Computational Mathematics Princeton University Princeton NJ USA Department of Mathematics Princeton University Princeton NJ USA

3D structure recovery from a collection of 2D images requires the estimation of the camera locations and orientations, i.e. the camera motion. For large, irregular collections of images, existing methods for the location estimation part, which can be formulated as the inverse problem of estimating n locations t 1 , t 2 , ..., tn in ℝ 3 from noisy measurements of a subset of the pairwise directions t i -t j /∥t i -t j ∥, are sensitive to outliers in direction measurements. In this paper, we firstly provide a complete characterization of well-posed instances of the location estimation problem, by presenting its relation to the existing theory of parallel rigidity. For robust estimation of camera locations, we introduce a two-step approach, comprised of a pairwise direction estimation method robust to outliers in point correspondences between image pairs, and a convex program to maintain robustness to outlier directions. In the presence of partially corrupted measurements, we empirically demonstrate that our convex formulation can even recover the locations exactly. Lastly, we demonstrate the utility of our formulations through experiments on Internet photo collections.

关键词： Estimation Cameras Robustness Noise measurement Three-dimensional displays Accuracy Minimization

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Weak-lensing mass calibration of ACTPOL sunyaev-zel’dovich clusters with the hyper suprime-cam survey

arXiv

引用

arXiv 2018年

作者： Miyatake, Hironao Battaglia, Nicholas Hilton, Matt Medezinski, Elinor Nishizawa, Atsushi J. More, Surhud Aiola, Simone Bahcall, Neta Bond, J. Richard Calabrese, Erminia Choi, Steve K. Devlin, Mark J. Dunkley, Joanna Dunner, Rolando Fuzia, Brittany Gallardo, Patricio Gralla, Megan Hasselfield, Matthew Halpern, Mark Hikage, Chiaki Hill, J. Colin Hincks, Adam D. Hložek, Renée Huffenberger, Kevin Hughes, John P. Koopman, Brian Kosowsky, Arthur Louis, Thibaut Madhavacheril, Mathew S. McMahon, Jeff Mandelbaum, Rachel Marriage, Tobias A. Maurin, Loïc Miyazaki, Satoshi Moodley, Kavilan Murata, Ryoma Naess, Sigurd Newburgh, Laura Niemack, Michael D. Nishimichi, Takahiro Okabe, Nobuhiro Oguri, Masamune Osato, Ken Page, Lyman Partridge, Bruce Robertson, Naomi Sehgal, Neelima Sherwin, Blake Shirasaki, Masato Sievers, Jonathan Sifón, Cristóbal Simon, Sara Spergel, David N. Staggs, Suzanne T. Stein, George Takada, Masahiro Trac, Hy Umetsu, Keiichi van Engelen, Alex Wollack, Edward J. Institute for Advanced Research Nagoya University Nagoya464-8601 Japan Division of Physics and Astrophysical Science Graduate School of Science Nagoya University Nagoya464-8602 Japan Jet Propulsion Laboratory California Institute of Technology PasadenaCA91109 United States UTIAS University of Tokyo Chiba277-8583 Japan Center for Computational Astrophysics Flatiron Institute New YorkNY10010 United States Department of Astronomy Cornell University IthacaNY14853 United States Department of Astrophysical Sciences Princeton University PrincetonNJ08544 United States Astrophysics & Cosmology Research Unit School of Mathematics Statistics & Computer Science University of KwaZulu-Natal Westville Campus Durban4041 South Africa Department of Physics Princeton University PrincetonNJ08544 United States Canadian Institute for Theoretical Astrophysics University of Toronto TorontoONM5S 3H8 Canada School of Physics and Astronomy Cardiff University The Parade CardiffCF24 3AA United Kingdom Department of Physics and Astronomy University of Pennsylvania PhiladelphiaPA19104 United States Instituto de Astrofísica Centro de Astro-Ingeniería Facultad de Física Pontificia Universidad Católica de Chile Av. Vicuña Mackenna 4860 Macul Santiago7820436 Chile Department of Physics Florida State University TallahasseeFL32306 United States Department of Physics Cornell University IthacaNY14853 United States Department of Astronomy/Steward Observatory University of Arizona 933 N. Cherry Ave. TucsonAZ85721 United States Institute for Gravitation and the Cosmos Pennsylvania State University University ParkPA16802 United States Department of Astronomy and Astrophysics Pennsylvania State University University ParkPA16802 United States Department of Physics and Astronomy University of British Columbia VancouverBCV6T 1Z4 Canada School of Natural Sciences Institute for Advanced Study PrincetonNJ08540 United States Department of Physics University

We present weak-lensing measurements using the first-year data from the Hyper Suprime-Cam Strategic Survey program on the Subaru telescope for eight galaxy clusters selected through their thermal Sunyaev-Zel’dovich (SZ) signal measured at 148 GHz with the Atacama Cosmology Telescope Polarimeter experiment. The overlap between the two surveys in this work is 33.8 square degrees, before masking bright stars. The signal-to-noise ratio of individual cluster lensing measurements ranges from 2.2 to 8.7, with a total of 11.1 for the stacked cluster weak-lensing signal. We fit for an average weak-lensing mass distribution using three different profiles, a Navarro-Frenk-White profile, a dark-matter-only emulated profile, and a full cosmological hydrodynamic emulated profile. We interpret the differences among the masses inferred by these models as a systematic error of 10%, which is currently smaller than the statistical error. We obtain the ratio of the SZ-estimated mass to the lensing-estimated mass (the so-called hydrostatic mass bias (Formula presented), which is comparable to previous SZ-selected clusters from the Atacama Cosmology Telescope and from the Planck Satellite. We conclude with a discussion of the implications for cosmological parameters inferred from cluster abundances compared to cosmic microwave background primary anisotropy measurements. Subject headings: galaxies: clusters: general;gravitational lensing: weak;cosmology: observations Copyright © 2018, The Authors. All rights reserved.

关键词： Cams

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Confined disordered strictly jammed binary sphere packings

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Physical Review E 2015年第6期92卷 062207-062207页

作者： D. Chen S. Torquato Department of Chemistry Department of Physics Princeton Institute for the Science and Technology of Materials and Program in Applied and Computational Mathematics Princeton University Princeton New Jersey 08544 USA

Disordered jammed packings under confinement have received considerably less attention than their bulk counterparts and yet arise in a variety of practical situations. In this work, we study binary sphere packings that are confined between two parallel hard planes and generalize the Torquato-Jiao (TJ) sequential linear programming algorithm [Phys. Rev. E 82, 061302 (2010)] to obtain putative maximally random jammed (MRJ) packings that are exactly isostatic with high fidelity over a large range of plane separation distances H, small to large sphere radius ratio α, and small sphere relative concentration x. We find that packing characteristics can be substantially different from their bulk analogs, which is due to what we term “confinement frustration.” Rattlers in confined packings are generally more prevalent than those in their bulk counterparts. We observe that packing fraction, rattler fraction, and degree of disorder of MRJ packings generally increase with H, though exceptions exist. Discontinuities in the packing characteristics as H varies in the vicinity of certain values of H are due to associated discontinuous transitions between different jammed states. When the plane separation distance is on the order of two large-sphere diameters or less, the packings exhibit salient two-dimensional features; when the plane separation distance exceeds about 30 large-sphere diameters, the packings approach three-dimensional bulk packings. As the size contrast increases (as α decreases), the rattler fraction dramatically increases due to what we call “size-disparity” frustration. We find that at intermediate α and when x is about 0.5 (50-50 mixture), the disorder of packings is maximized, as measured by an order metric ψ that is based on the number density fluctuations in the direction perpendicular to the hard walls. We also apply the local volume-fraction variance στ2(R) to characterize confined packings and find that these packings possess essentially the same level of

关键词： RESEARCH Combinatorial packing & covering Linear programming Density Powders Sphere packings

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Ground states of stealthy hyperuniform potentials. II. Stacked-slider phases

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Physical Review E 2015年第2期92卷 022120-022120页

作者： G. Zhang F. H. Stillinger S. Torquato Department of Chemistry Department of Physics Princeton Institute for the Science and Technology of Materials and Program in Applied and Computational Mathematics Princeton University Princeton New Jersey 08544 USA

Stealthy potentials, a family of long-range isotropic pair potentials, produce infinitely degenerate disordered ground states at high densities and crystalline ground states at low densities in d-dimensional Euclidean space Rd. In the previous paper in this series, we numerically studied the entropically favored ground states in the canonical ensemble in the zero-temperature limit across the first three Euclidean space dimensions. In this paper, we investigate using both numerical and theoretical techniques metastable stacked-slider phases, which are part of the ground-state manifold of stealthy potentials at densities in which crystal ground states are favored entropically. Our numerical results enable us to devise analytical models of this phase in two, three, and higher dimensions. Utilizing this model, we estimated the size of the feasible region in configuration space of the stacked-slider phase, finding it to be smaller than that of crystal structures in the infinite-system-size limit, which is consistent with our recent previous work. In two dimensions, we also determine exact expressions for the pair correlation function and structure factor of the analytical model of stacked-slider phases and analyze the connectedness of the ground-state manifold of stealthy potentials in this density regime. We demonstrate that stacked-slider phases are distinguishable states of matter; they are nonperiodic, statistically anisotropic structures that possess long-range orientational order but have zero shear modulus. We outline some possible future avenues of research to elucidate our understanding of this unusual phase of matter.

关键词： GROUND state (Quantum mechanics) ENERGY levels (Quantum mechanics) EUCLIDEAN domains MOLECULAR dynamics QUANTUM entropy

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Ground states of stealthy hyperuniform potentials: I. Entropically favored configurations

引用

Physical Review E 2015年第2期92卷 022119-022119页

Systems of particles interacting with “stealthy” pair potentials have been shown to possess infinitely degenerate disordered hyperuniform classical ground states with novel physical properties. Previous attempts to sample the infinitely degenerate ground states used energy minimization techniques, introducing algorithmic dependence that is artificial in nature. Recently, an ensemble theory of stealthy hyperuniform ground states was formulated to predict the structure and thermodynamics that was shown to be in excellent agreement with corresponding computer simulation results in the canonical ensemble (in the zero-temperature limit). In this paper, we provide details and justifications of the simulation procedure, which involves performing molecular dynamics simulations at sufficiently low temperatures and minimizing the energy of the snapshots for both the high-density disordered regime, where the theory applies, as well as lower densities. We also use numerical simulations to extend our study to the lower-density regime. We report results for the pair correlation functions, structure factors, and Voronoi cell statistics. In the high-density regime, we verify the theoretical ansatz that stealthy disordered ground states behave like “pseudo” disordered equilibrium hard-sphere systems in Fourier space. The pair statistics obey certain exact integral conditions with very high accuracy. These results show that as the density decreases from the high-density limit, the disordered ground states in the canonical ensemble are characterized by an increasing degree of short-range order and eventually the system undergoes a phase transition to crystalline ground states. In the crystalline regime (low densities), there exist aperiodic structures that are part of the ground-state manifold but yet are not entropically favored. We also provide numerical evidence suggesting that different forms of stealthy pair potentials produce the same ground-state ensemble in the zero-temperatur

关键词： THERMODYNAMIC equilibrium PROBABILITY theory QUANTUM spin models MOLECULAR dynamics QUANTUM entropy

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Corrigendum to “Revisiting a magneto-elastic strange attractor” [J. Sound Vib. 333 (6) (2014) 1767–1780]

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Journal of Sound and Vibration 2016年 367卷 256-256页

作者： Jee Ian Tam Philip Holmes Department of Mechanical and Aerospace Engineering Princeton University Princeton NJ 08544 USA Program in Applied and Computational Mathematics Princeton University Princeton NJ 08544 USA

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Planck intermediate results. LV. reliability and thermal properties of high-frequency sources in the second planck catalogue of compact sources

arXiv

引用

arXiv 2020年

作者： Akrami, Y. Ashdown, M. Aumont, J. Baccigalupi, C. Ballardini, M. Banday, A.J. Barreiro, R.B. Bartolo, N. Basak, S. Benabed, K. Bernard, J.-P. Bersanelli, M. Bielewicz, P. Bond, J.R. Borrill, J. Bouchet, F.R. Burigana, C. Calabrese, E. Carvalho, P. Chiang, H.C. Crill, B.P. Cuttaia, F. de Rosa, A. de Zotti, G. Delabrouille, J. Delouis, J.-M. Di Valentino, E. Diego, J.M. Dupac, X. Dusini, S. Efstathiou, G. Elsner, F. Enßlin, T.A. Eriksen, H.K. Fernandez-Cobos, R. Finelli, F. Fraisse, A.A. Franceschi, E. Frolov, A. Galeotta, S. Ganga, K. Gerbino, M. González-Nuevo, J. Górski, K.M. Gratton, S. Gruppuso, A. Gudmundsson, J.E. Handley, W. Hansen, F.K. Herranz, D. Hivon, E. Hobson, M. Huang, Z. Jones, W.C. Keihänen, E. Keskitalo, R. Kim, J. Kisner, T.S. Krachmalnicoff, N. Kunz, M. Kurki-Suonio, H. Lamarre, J.-M. Lasenby, A. Lattanzi, M. Lawrence, C.R. Le Jeune, M. Lilje, P.B. Lindholm, V. López-Caniego, M. Ma, Y.-Z. Macías-Pérez, J.F. Maggio, G. Mandolesi, N. Marcos-Caballero, A. Maris, M. Martin, P.G. Martínez-González, E. Matarrese, S. Mauri, N. McEwen, J.D. Migliaccio, M. Molinari, D. Moneti, A. Montier, L. Morgante, G. Natoli, P. Paoletti, D. Partridge, B. Perrotta, F. Pettorino, V. Piacentini, F. Polenta, G. Puget, J.-L. Rachen, J.P. Reinecke, M. Remazeilles, M. Renzi, A. Rocha, G. Roudier, G. Ruiz-Granados, B. Savelainen, M. Scott, D. Sirri, G. Spencer, L.D. Suur-Uski, A.-S. Tauber, J.A. Tavagnacco, D. Tenti, M. Toffolatti, L. Tomasi, M. Trombetti, T. Valiviita, J. van Tent, B. Vielva, P. Villa, F. Wehus, I.K. Zacchei, A. Zonca, A. AIM CEA CNRS Université Paris-Saclay Université Paris-Diderot Sorbonne Paris Cité Gif-sur-YvetteF-91191 France APC AstroParticule et Cosmologie Université Paris Diderot CNRS/IN2P3 CEA/lrfu Observatoire de Paris Sorbonne Paris Cité 10 rue Alice Domon et Léonie Duquet Paris Cedex 1375205 France African Institute for Mathematical Sciences 6-8 Melrose Road Muizenberg Cape Town South Africa Astrophysics Group Cavendish Laboratory University of Cambridge J J Thomson Avenue CambridgeCB3 0HE United Kingdom Astrophysics & Cosmology Research Unit School of Mathematics Statistics & Computer Science University of KwaZulu-Natal Westville Campus Private Bag X54001 Durban4000 South Africa CITA University of Toronto 60 St. George St. TorontoONM5S 3H8 Canada CMDLABS Cambridge Machines Deep Learning and Bayesian Systems Ltd 22 Wycombe End Beaconsfield BuckinghamshireHP9 1NB United Kingdom CNRS IRAP 9 Av. colonel Roche BP 44346 Toulouse cedex 4F-31028 France California Institute of Technology PasadenaCA United States Computational Cosmology Center Lawrence Berkeley National Laboratory BerkeleyCA United States Département de Physique Théorique Université de Genève 24 Quai E. Ansermet Genève 41211 Switzerland Département de Physique École normale supérieure PSL Research University CNRS 24 rue Lhomond Paris75005 France La Laguna TenerifeE-38206 Spain Departamento de Física Universidad de Oviedo C/ Federico García Lorca 18 Oviedo Spain Department of Astrophysics IMAPP Radboud University P.O. Box 9010 Nijmegen6500 GL Netherlands Department of Physics & Astronomy University of British Columbia 6224 Agricultural Road VancouverBC Canada Department of Physics & Astronomy University of the Western Cape Cape Town7535 South Africa Department of Physics Gustaf Hällströmin katu 2a University of Helsinki Helsinki Finland Department of Physics Princeton University PrincetonNJ United States Dipartimento di Fisica e Astronomia G. Galilei Univ

We describe an extension of the most recent version of the Planck Catalogue of Compact Sources (PCCS2), produced using a new multi-band Bayesian Extraction and Estimation Package (BeeP). BeeP assumes that the compact sources present in PCCS2 at 857 GHz have a dust-like spectral energy distribution (SED), which leads to emission at both lower and higher frequencies, and adjusts the parameters of the source and its SED to fit the emission observed in Planck’s three highest frequency channels at 353, 545, and 857 GHz, as well as the IRIS map at 3000 GHz. In order to reduce confusion regarding diffuse cirrus emission, BeeP’s data model includes a description of the background emission surrounding each source, and it adjusts the confidence in the source parameter extraction based on the statistical properties of the spatial distribution of the background emission. BeeP produces the following three new sets of parameters for each source: (a) fits to a modified blackbody (MBB) thermal emission model of the source;(b) SED-independent source flux densities at each frequency considered;and (c) fits to an MBB model of the background in which the source is embedded. BeeP also calculates, for each source, a reliability parameter, which takes into account confusion due to the surrounding cirrus. This parameter can be used to extract sub-samples of high-frequency sources with statistically well-understood properties. We define a high-reliability subset (BeeP/base), containing 26 083 sources (54.1 % of the total PCCS2 catalogue), the majority of which have no information on reliability in the PCCS2. We describe the characteristics of this specific high-quality subset of PCCS2 and its validation against other data sets, specifically for: the sub-sample of PCCS2 located in low-cirrus areas;the Planck Catalogue of Galactic Cold Clumps (GCC);the Herschel GAMA15-field catalogue;and the temperature- and spectral-index-reconstructed dust maps obtained with Planck’s Generalized Needlet Int

关键词： Extraction

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