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arXiv 2020年

作者： Edelman, Bruce Rivera-Paleo, F.J. Merritt, J.D. Farr, Ben Doctor, Zoheyr Brink, Jeandrew Farr, Will M. Gair, Jonathan Key, Joey Shapiro McIver, Jess Nielsen, Alex B. Department of Physics University of Oregon EugeneOR97403 United States Departament d’Astronomia i Astrofísica Universitat de València Burjassot46100 Spain Department of Mathematics and Applied Mathematics University of the Free State PO Box 339 Bloemfontein South Africa Department of Physics and Astronomy Stony Brook University Stony BrookNY11794 United States Center for Computational Astrophysics Flatiron Institute New YorkNY10010 United States Am Mühlenberg 1 Golm PotsdamD-14476 Germany University of Washington Bothell 18115 Campus Way NE BothellWA98011 United States University of British Columbia VancouverBCV6T 1Z4 Canada HannoverD-30167 Germany Department of Mathematics and Physics University of Stavanger Stavanger4036 Norway

We present a flexible model to describe the effects of generic deviations of observed gravitational wave signals from modeled waveforms in the LIGO and Virgo gravitational wave detectors. With the detection of 11 gravitational wave events from the GWTC-1 catalog, we are able to constrain possible deviations from our modeled waveforms. In this paper we present our coherent spline model that describes the deviations, then choose to validate our model on an example phenomenological and astrophysically motivated departure in waveforms based on extreme spontaneous scalarization. We find that the model is capable of recovering the simulated deviations. By performing model comparisons we observe that the spline model effectively describes the simulated departures better than a normal compact binary coalescence (CBC) model. We analyze the entire GWTC-1 catalog of events with our model and compare it to a normal CBC model, finding that there are no significant departures from the modeled template gravitational waveforms used. Copyright © 2020, The Authors. All rights reserved.

关键词： Gravity waves

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The SCUBA-2 Large eXtragalactic Survey: 850 μm map, catalogue and the bright-end number counts of the XMM-LSS field

arXiv

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arXiv 2023年

作者： Garratt, T.K. Geach, J.E. Tamura, Y. Coppin, K.E.K. Franco, M. Ao, Y. Chen, C.-C. Cheng, C. Clements, D.L. Dai, Y.S. Dannerbauer, H. Greve, T.R. Hatsukade, B. Hwang, H.S. Jiang, L. Kohno, K. Koprowski, M.P. Michalowski, M.J. Sawicki, M. Scott, D. Shim, H. Takeuchi, T.T. Wang, W.-H. Xue, Y.Q. Yang, C. Centre for Astrophysics Research University of Hertfordshire HatfieldAL10 9AB United Kingdom Division of Particle and Astrophysical Science Nagoya University Aichi Nagoya464-8602 Japan Purple Mountain Observatory Key Laboratory for Radio Astronomy Chinese Academy of Sciences 10 Yuanhua Road Nanjing210023 China School of Astronomy and Space Science University of Science and Technology of China Anhui Hefei230026 China Academia Sinica Institute of Astronomy and Astrophysics No. 1 Section 4 Roosevelt Road Taipei10617 Taiwan Chinese Academy of Sciences South America Center for Astronomy National Astronomical Observatories CAS Beijing100101 China Imperial College London Blackett Lab Prince Consort Road LondonSW7 2AZ United Kingdom National Astronomical Observatories Chinese Academy of Sciences 20A Datun RoadChaoyang District Beijing100101 China Tenerife La LagunaE-38205 Spain Universidad de La Laguna Dpto. Astrofísica Tenerife La LagunaE-38206 Spain National Space Institute DTU Space Technical University of Denmark Elektrovej 327 Kgs. LyngbyDK-2800 Denmark Department of Physics and Astronomy University College London Gower Street LondonWC1E 6BT United Kingdom Institute of Astronomy Graduate School of Science The University of Tokyo 2-21-1 Osawa Tokyo Mitaka181-0015 Japan Astronomy Program Department of Physics and Astronomy Seoul National University 1 Gwanak-ro Gwanak-gu Seoul08826 Korea Republic of SNU Astronomy Research Center Astronomy Program Seoul National University 1 Gwanak-ro Gwanak-gu Seoul08826 Korea Republic of Kavli Institute for Astronomy and Astrophysics Peking University No. 5 Yiheyuan Road Haidian District Beijing100871 China Institute of Astronomy Faculty of Physics Astronomy and Informatics Nicolaus Copernicus University Grudziadzka 5 Torun87-100 Poland Astronomical Observatory Institute Faculty of Physics Adam Mickiewicz University ul. Sloneczna 36 Poznań60-286 Poland Department of Astronomy and P

We present 850 μm imaging of the XMM-LSS field observed for 170 hours as part of the James Clerk Maxwell Telescope SCUBA-2 Large eXtragalactic Survey (S2LXS). S2LXS XMM-LSS maps an area of 9 deg2, reaching a moderate depth of 1σ 4 mJy beam−1. This is the largest contiguous area of extragalactic sky mapped by JCMT at 850 μm to date. The wide area of the S2LXS XMM-LSS survey allows us to probe the ultra-bright (S850μm & 15 mJy), yet rare submillimetre population. We present the S2LXS XMM-LSS catalogue, which comprises 40 sources detected at >5σ significance, with deboosted flux densities in the range of 7 mJy to 48 mJy. We robustly measure the bright-end of the 850 μm number counts at flux densities >7 mJy, reducing the Poisson errors compared to existing measurements. The S2LXS XMM-LSS observed number counts show the characteristic upturn at bright fluxes, expected to be motivated by local sources of submillimetre emission and high-redshift strongly lensed galaxies. We find that the observed 850 μm number counts are best reproduced by model predictions that include either strong lensing or source blending from a 15 arcsec beam, indicating that both may make an important contribution to the observed over-abundance of bright single dish 850 μm selected sources. We make the S2LXS XMM-LSS 850 μm map and >5σ catalogue presented here publicly available. Copyright © 2023, The Authors. All rights reserved.

关键词： Blending

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Nature of the magnetic moment of cobalt in ordered FeCo alloy

arXiv

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arXiv 2019年

作者： Gerasimov, Arsenii Nordström, Lars Khmelevskyi, Sergii Mazurenko, Vladimir V. Kvashnin, Yaroslav O. Theoretical Physics and Applied Mathematics Department Ural Federal University Mira Str. 19 Ekaterinburg620002 Russia Uppsala University Department of Physics and Astronomy Division of Materials Theory Box 516 UppsalaSE-751 20 Sweden Center for Computational Materials Science Institute for Applied Physics Vienna University of Technology Wiedner Hauptstrasse 8 ViennaA-1040 Austria

The magnets are typically classified into Stoner and Heisenberg type, depending on itinerant or localized nature of the constituent magnetic moments. In this work we investigate theoretically the behaviour of the magnetic moments of iron and cobalt in their B2-ordered alloy. The results based on local spin density approximation for the density functional theory (DFT) suggest that the Co magnetic moment strongly depends on the directions of the surrounding magnetic moments. Although this seems to indicate the Stoner-type magnetism of Co, it is shown that this can be understood as due to the strong ferromagnetic exchange coupling between Fe and Co atoms. Within the disordered local moment (DLM) picture of the paramagnetic state, the magnetic moment of cobalt get substantially suppressed. The DLM, however, provides an incomplete description, due to the absence of strong on-site electron correlations. In order to correct it, we have performed a series of DFT calculations combined with dynamical mean-field theory. Our results suggest that local correlations play an essential role in stabilizing a robust moment on Co at high temperatures. The results are relevant for constructing more accurate thermodynamical models of the B2 FeCo alloy. Copyright © 2019, The Authors. All rights reserved.

关键词： Magnetic moments

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Oxygen vacancy modulated superconductivity in monolayer FeSe on SrTiO3−δ

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Physical Review B 2019年第22期100卷 224504-224504页

作者： Guanming Gong Haohao Yang Qinghua Zhang Cui Ding Jingsong Zhou Yujie Chen Fanqi Meng Zhiyu Zhang Wenfeng Dong Fawei Zheng Ping Zhang Lexian Yang Lin Gu Qi-Kun Xue Lili Wang State Key Laboratory of Low-Dimensional Quantum Physics Department of Physics Tsinghua University Beijing 100084 China Laboratory for Advanced Materials & Electron Microscopy Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China Institute of Applied Physics and Computational Mathematics Beijing 100088 China Frontier Science Center for Quantum Information Beijing 100084 China Beijing Academy of Quantum Information Sciences Beijing 100193 China

The monolayer FeSe on SrTiO3−δ exhibits a twofold enlarged pairing gap compared with other electron-doped FeSe, which is postulated to originate from cooperative effects of interface charge transfer and electron-boson interaction that relate closely to surface oxygen vacancies in SrTiO3. We create gradient oxygen vacancies on the surface of SrTiO3−δ substrates using direct current heating. Combining spatially resolved spectroscopy characterizations, we disclose gradient pairing gaps but negligible doping variation in monolayer FeSe on such substrates. As oxygen vacancy concentration gradually increases from the anode to cathode region, the pairing gap increases from 12 to 17 meV, right beyond the values of electron-doped FeSe. This modulation provides a platform for spatially resolved investigations to unveil the interplay between electronic correlation and electron-phonon interaction and their cooperation to drive superconductivity.

关键词： Desorption Electron-phonon coupling Superconductivity Vacancies High-temperature superconductors Iron-based superconductors Monolayer films Angle-resolved photoemission spectroscopy Electron energy loss spectroscopy Scanning transmission electron microscopy Scanning tunneling microscopy Scanning tunneling spectroscopy

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Thermodynamic phase transitions of nematic order in magnetic helices

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Science Advances 2025年第25期11卷

作者： Zoey Tumbleson Sophie A. Morley Emily Hollingworth Arnab Singh Temuujin Bayaraa Nicolas G. Burdet Ahmad Us Saleheen Margaret R. McCarter David Raftrey Ronald J. Pandolfi Vincent Esposito Georgi L. Dakovski Franz-Josef Decker Alexander H. Reid Tadesse A. Assefa Peter Fischer Sinéad M. Griffin Stephen D. Kevan Frances Hellman Joshua J. Turner Sujoy Roy Department of Physics University of California Santa Cruz Santa Cruz CA 95064 USA. Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA. Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA. Department of Physics University of California Berkeley Berkeley CA 94720 USA. Materials Science Division Argonne National Laboratory Lemont IL 60439 USA. Linac Coherent Light Source SLAC National Accelerator Laboratory Menlo Park CA 94025 USA. Stanford Institute for Materials and Energy Sciences SLAC National Accelerator Laboratory and Stanford University Menlo Park CA 94025 USA. Center for Advanced Mathematics for Energy Research Applications Applied Mathematics and Computational Research Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA. Molecular Foundry Lawrence Berkeley National Laboratory Berkeley CA 94720 USA. Department of Materials Science and Engineering University of California Berkeley Berkeley CA 94720 USA.

A nematic phase lacks translation order but has orientational order. Nematic phases have been discovered in a variety of systems, including liquid crystals, correlated materials, and superconductors. Here, we report on a magnetic nematic phase, where the basis components are composed of magnetic helices. We directly probed the order parameters associated with the magnetic helices using resonant soft x-ray scattering and find two distinct nematic phases with complex spatiotemporal signatures. Using x-ray correlation spectroscopy, we find that near the phase boundary between the two nematic phases, fluctuations coexist on multiple disparate timescales. Our micromagnetic simulations and density functional theory calculations show that the fluctuations occur concomitantly with a reorientation of the magnetic helices, indicating spontaneous symmetry breaking and the emergence of additional degrees of freedom. Our results provide a framework for characterizing exotic phases that can be extended to a broad class of physical systems.

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Anomalous stopping of laser-accelerated intense proton beam in dense ionized matter

arXiv

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arXiv 2020年

作者： Ren, Jieru Deng, Zhigang Qi, Wei Chen, Benzheng Ma, Bubo Wang, Xing Yin, Shuai Feng, Jianhua Liu, Wei Hoffmann, Dieter H.H. Wang, Shaoyi Fan, Quanping Cui, Bo He, Shukai Cao, Zhurong Zhao, Zongqing Cao, Leifeng Gu, Yuqiu Zhu, Shaoping Cheng, Rui Zhou, Xianming Xiao, Guoqing Zhao, Hongwei Zhang, Yihang Zhang, Zhe Li, Yutong Wu, Dong Zhou, Weimin Zhao, Yongtao MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of Science Xi'an Jiaotong University Xi'an710049 China Science and Technology on Plasma Physics Laboratory Laser Fusion Research Center China Academy of Engineering Physics Mianyang621900 China Institute for Fusion Theory and Simulation Department of Physics Zhejiang University Hangzhou310058 China Xi'an Technological University Xi'an710021 China Institute of Applied Physics and Computational Mathematics Beijing100094 China Graduate School China Academy of Engineering Physics Beijing100088 China Institute of Modern Physics Chinese Academy of Sciences Lanzhou710049 China Xianyang Normal University Xianyang712000 China Institute of Physics Chinese Academy of Sciences Beijing100190 China

Ultrahigh-intensity lasers (1018-1022W/cm2) have opened up new perspectives in many fields of research and application [1-5]. By irradiating a thin foil, an ultrahigh accelerating field (1012 V/m) can be formed and multi-MeV ions with unprecedentedly high intensity (1010A/cm2) in short time scale (∼ps) are produced [6-14]. Such beams provide new options in radiography [15], high-yield neutron sources [16], high-energy-density-matter generation [17], and ion fast ignition [18, 19]. An accurate understanding of the nonlinear behavior of beam transport in matter is crucial for all these applications. We report here the first experimental evidence of anomalous stopping of a laser-generated high-current proton beam in well-characterized dense ionized matter. The observed stopping power is one order of magnitude higher than single-particle slowing-down theory predictions. We attribute this phenomenon to collective effects where the intense beam drives an decelerating electric field approaching 1GV/m in the dense ionized matter. This finding will have considerable impact on the future path to inertial fusion energy. Copyright © 2020, The Authors. All rights reserved.

关键词： Neutron sources

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New families in our Solar neighborhood: applying Gaussian Mixture models for objective classification of structures in the Milky Way and in simulations

arXiv

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arXiv 2021年

作者： Nikakhtar, Farnik Sanderson, Robyn E. Wetzel, Andrew Loebman, Sarah Sharma, Sanjib Beaton, Rachael Ted Mackereth, J. Poovelil, Vijith Jacob Zasowski, Gail Bonaca, Ana Martell, Sarah Jönsson, Henrik Faucher-Giguère, Claude-André Department of Physics & Astronomy University of Pennsylvania 209 S 33rd St. PhiladelphiaPA19104 United States Center for Computational Astrophysics Flatiron Institute 162 5th Ave New YorkNY10010 United States Department of Physics & Astronomy University of California DavisCA95616 United States Department of Physics University of California Merced 5200 North Lake Rd. MercedCA95343 United States Sydney Institute for Astronomy School of Physics University of Sydney A28 NSW2006 Australia Australia Department of Astrophysical Sciences Princeton University 4 Ivy Lane PrincetonNJ08544 United States Observatories of the Carnegie Institution for Science 813 Santa Barbara St. PasadenaCA91101 United States Canadian Institute for Theoretical Astrophysics University of Toronto 60 St. George Street TorontoONM5S 3H8 Canada Dunlap Institute for Astronomy and Astrophysics University of Toronto 50 St. George Street TorontoONM5S 3H4 Canada Department of Physics & Astronomy University of Utah Salt Lake CityUT84112 United States Center for Astrophysics Harvard & Smithsonian 60 Garden Street CambridgeMA02138 United States School of Physics UNSW SydneyNSW2052 Australia Materials Science and Applied Mathematics Malmö University MalmöSE-205 06 Sweden Department of Physics and Astronomy CIERA Northwestern University 2145 Sheridan Road EvanstonIL60208 United States

The standard picture of galaxy formation motivates the decomposition of the Milky Way into 3–4 stellar populations with distinct kinematic and elemental abundance distributions: the thin disk, thick disk, bulge, and stellar halo. To test this idea, we construct a Gaussian mixture model (GMM) for both simulated and observed stars in the Solar neighborhood, using measured velocities and iron abundances (i.e., an augmented Toomre diagram) as the distributions to be decomposed. We compare results for the Gaia-APOGEE DR16 crossmatch catalog of the Solar neighborhood with those from a suite of synthetic Gaia-APOGEE crossmatches constructed from FIRE-2 cosmological simulations of Milky Way-mass galaxies. We find that in both the synthetic and real data, the best-fit GMM uses five independent components, some of whose properties resemble the standard populations predicted by galaxy formation theory. Two components can be identified unambiguously as the thin disk and another as the halo. However, instead of a single counterpart to the thick disk, there are three intermediate components with different age and alpha abundance distributions (although these data are not used to construct the model). We use decompositions of the synthetic data to show that the classified components indeed correspond to stars with different origins. By analogy with the simulated data, we show that our mixture model of the real Gaia-APOGEE crossmatch distinguishes the following components: (1) a classic thin disk of young stars on circular orbits (46%), (2) thin disk stars heated by interactions with satellites (22%), (3, 4) two components representing the velocity asymmetry of the alpha-enhanced thick disk (27%), and (5) a stellar halo consistent with early, massive accretion (4%). Copyright © 2021, The Authors. All rights reserved.

关键词： Galaxies

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Dynamics of nanosecond laser pulse propagation and of associated instabilities in a magnetized underdense plasma

arXiv

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arXiv 2022年

作者： Yao, W. Higginson, A. Marquès, J.-R. Antici, P. Béard, J. Burdonov, K. Borghesi, M. Castan, A. Ciardi, A. Coleman, B. Chen, S.N. D'Humières, E. Gangolf, T. Gremillet, L. Khiar, B. Lancia, L. Loiseau, P. Ribeyre, X. Soloviev, A. Starodubtsev, M. Wang, Q. Fuchs, J. Luli Cnrs Cea Upmc Univ Paris 06 : Sorbonne Université Ecole Polytechnique Institut Polytechnique de Paris PalaiseauF-91128 cedex France Sorbonne Université Observatoire de Paris Université Psl CNRS Lerma ParisF-75005 France Center for Energy Research University of California San Diego 9500 Gilman Drive La Jolla CA92093-0417 United States INRS-EMT 1650 boul Lionel-Boulet VarennesQCJ3X 1S2 Canada Cnrs Lncmi Univ Toulouse 3 Insa Toulouse Univ Grenoble Alpes Emfl Toulouse31400 France Jiht Russian Academy of Sciences Moscow125412 Russia School of Mathematics and Physics The Queen's University Belfast Belfast United Kingdom Cea Dam Dif F-91297 France 'Horia Hulubei' National Institute for Physics and Nuclear Engineering Bucharest-MagureleRO-077125 Romania University of Bordeaux Celia Cnrs Cea Umr 5107 TalenceF-33405 France Université Paris-Saclay Cea Lmce Bruyères-le-Châtel91680 France Palaiseau91123 France IAP-RAS Nizhny Novgorod Russia Institute of Applied Physics and Computational Mathematics Beijing100094 China Department of Electrical and Computer Engineering University of Alberta 9211 116 St. NW EdmontonABT6G 1H9 Canada

The propagation and energy coupling of intense laser beams in plasmas are critical issues in laser-driven inertial confinement fusion. Applying magnetic fields to such a setup has been evoked to enhance fuel confinement and heating, and mitigate laser energy losses. Here we report on experimental measurements demonstrating improved transmission and increased smoothing of a high-power laser beam propagating in an underdense magnetized plasma. We also measure enhanced backscattering, which our simulations show is due to hot electrons confinement, thus leading to reduced target preheating. © 2022, CC BY-NC-SA.

关键词： Hot electrons

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EMPRESS. X. Spatially resolved mass-metallicity relation in extremely metal-poor galaxies: Evidence of episodic star-formation fueled by a metal-poor gas infall

arXiv

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arXiv 2024年

作者： Nakajima, Kimihiko Ouchi, Masami Isobe, Yuki Xu, Yi Ozaki, Shinobu Nagao, Tohru Inoue, Akio K. Rauch, Michael Kusakabe, Haruka Onodera, Masato Nishigaki, Moka Ono, Yoshiaki Sugahara, Yuma Hattori, Takashi Hirai, Yutaka Hashimoto, Takuya Kim, Ji Hoon Moriya, Takashi J. Yanagisawa, Hiroto Aoyama, Shohei Fujimoto, Seiji Fukushima, Hajime Fukushima, Keita Harikane, Yuichi Hatano, Shun Hayashi, Kohei Ishigaki, Tsuyoshi Kawasaki, Masahiro Kojima, Takashi Komiyama, Yutaka Koyama, Shuhei Koyama, Yusei Lee, Chien-Hsiu Matsumoto, Akinori Mawatari, Ken Motohara, Kentaro Murai, Kai Nagamine, Kentaro Nakane, Minami Saito, Tomoki Sasaki, Rin Shibuya, Takatoshi Suzuki, Akihiro Takeuchi, Tsutomu T. Umeda, Hiroya Umemura, Masayuki Watanabe, Kuria Yabe, Kiyoto Yajima, Hidenobu Zhang, Yechi National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Institute for Cosmic Ray Research The University of Tokyo 5-1-5 Kashiwanoha Chiba Kashiwa277-8582 Japan Osawa 2-21-1 Mitaka Tokyo181-8588 Japan University of Tokyo Chiba Kashiwa277-8583 Japan Kavli Institute for Cosmology University of Cambridge Madingley Road CambridgeCB3 0HA United Kingdom Cavendish Laboratory University of Cambridge 19 JJ Thomson Avenue CambridgeCB3 0HE United Kingdom Waseda Research Institute for Science and Engineering Faculty of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku Tokyo169-8555 Japan Department of Physics Graduate School of Science The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan Department of Astronomy Graduate School of Science The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan Research Center for Space and Cosmic Evolution Ehime University Bunkyo-cho 2-5 Ehime Matsuyama790-8577 Japan Department of Physics School of Advanced Science and Engineering Faculty of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku Tokyo169-8555 Japan Observatories of the Carnegie Institution for Science 813 Santa Barbara St. PasadenaCA91101 United States Observatoire de Genève Université de Genève 51 Chemin de Pégase Versoix1290 Switzerland 650 North Aohoku Place HiloHI96720 United States Department of Physics and Astronomy University of Notre Dame 225 Nieuwland Science Hall Notre DameIN46556 United States Astronomical Institute Tohoku University 6-3 Aoba Aramaki Aoba-ku Miyagi Sendai980-8578 Japan Division of Physics Faculty of Pure and Applied Sciences University of Tsukuba Ibaraki Tsukuba305-8571 Japan Faculty of Pure and Applied Sciences University of Tsukuba Ibaraki Tsukuba305-8571 Japan Astronomy Program Department of Physics and Astronomy Seoul National University 1 Gwanak-ro Gwanak-gu Seoul08826 Korea Republic of SNU Astronomy Research Cent

Using the Subaru/FOCAS IFU capability, we examine the spatially resolved relationships between gas-phase metallicity, stellar mass, and star-formation rate surface densities (Σ★ and ΣSFR, respectively) in extremely metal-poor galaxies (EMPGs) in the local universe. Our analysis includes 24 EMPGs, comprising 9,177 spaxels, which span a unique parameter space of local metallicity (12 + log(O/H) 6.9 to 7.9) and stellar mass surface density (Σ★ ∼ 105 to 107 Mo kpc−2), extending beyond the range of existing large integral-field spectroscopic surveys. Through spatially resolved emission line diagnostics based on the [N ii] BPT-diagram, we verify the absence of evolved active galactic nuclei in these EMPGs. Our findings reveal that, while the resolved mass-metallicity relation exhibits significant scatter in the low-mass regime, this scatter is closely correlated with local star-formation surface density. Specifically, metallicity decreases as ΣSFR increases for a given Σ★. Notably, half of the EMPGs show a distinct metal-poor horizontal branch on the resolved mass-metallicity relation. This feature typically appears at the peak clump with the highest Σ★ and ΣSFR and is surrounded by a relatively metal-enriched ambient region. These findings support a scenario in which metal-poor gas infall fuels episodic star formation in EMPGs, consistent with the kinematic properties observed in these systems. In addition, we identify four EMPGs with exceptionally low central metallicities (12 + log(O/H) 7.2), which display only a metal-poor clump without a surrounding metal-rich region. This suggests that such ultra-low metallicity EMPGs, at less than a few percent of the solar metallicity, may serve as valuable analogs for galaxies in the early stages of galaxy evolution. Copyright © 2024, The Authors. All rights reserved.

关键词： Spectroscopic analysis

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Snowmass2021 CMB-HD White Paper

arXiv

引用

arXiv 2022年

作者： Aiola, Simone Akrami, Yashar Basu, Kaustuv Boylan-Kolchin, Michael Brinckmann, Thejs Bryan, Sean Casey, Caitlin M. Chluba, Jens Clesse, Sébastien Cyr-Racine, Francis-Yan Di Mascolo, Luca Dicker, Simon Essinger-Hileman, Thomas Farren, Gerrit S. Fedderke, Michael A. Ferraro, Simone Fuller, George M. Galitzki, Nicholas Gluscevic, Vera Grin, Daniel Han, Dongwon Hasselfield, Matthew Hložek, Renée Holder, Gil Hotinli, Selim C. Jain, Bhuvnesh Johnson, Bradley Johnson, Matthew Klaassen, Pamela MacInnis, Amanda Madhavacheril, Mathew Mandal, Sayan Mauskopf, Philip Meerburg, Daan Meyers, Joel Miranda, Vivian Mroczkowski, Tony Mukherjee, Suvodip Münchmeyer, Moritz Munoz, Julian Naess, Sigurd Nagai, Daisuke Namikawa, Toshiya Newburgh, Laura Nguyên, Hô Nam Niemack, Michael Oppenheimer, Benjamin D. Pierpaoli, Elena Raghunathan, Srinivasan Schaan, Emmanuel Sehgal, Neelima Sherwin, Blake Simon, Sara M. Slosar, Anže Smith, Kendrick Spergel, David Switzer, Eric R. Trivedi, Pranjal Tsai, Yu-Dai van Engelen, Alexander Wandelt, Benjamin D. Wollack, Edward J. Wu, Kimmy Center for Computational Astrophysics Flatiron Institute 162 5th Avenue New YorkNY10010 United States CERCA ISO Department of Physics Case Western Reserve University 10900 Euclid Avenue ClevelandOH44106 United States Department of Physics Imperial College London Blackett Laboratory Prince Consort Road LondonSW7 2AZ United Kingdom Laboratoire de Physique de l’École Normale Supérieure ENS Université PSL CNRS Sorbonne Université ParisF-75005 France Observatoire de Paris Université PSL Sorbonne Université LERMA Paris750 France Argelander Institute for Astronomy University of Bonn Auf dem Hügel 71 BonnD-53121 Germany Department of Astronomy The University of Texas at Austin 2515 Speedway Stop C1400 AustinTX78712 United States Dipartimento di Fisica e Scienze della Terra Universitá degli Studi di Ferrara via Giuseppe Saragat 1 Ferrara44122 Italy Sezione di Ferrara Via Giuseppe Saragat 1 Ferrara44122 Italy School of Earth and Space Exploration Arizona State University 781 Terrace Mall TempeAZ85287 United States Jodrell Bank Centre for Astrophysics Alan Turing Building University of Manchester ManchesterM13 9PL United Kingdom Université Libre de Bruxelles Boulevard du Triomphe Brussels1050 Belgium Department of Physics and Astronomy University of New Mexico 210 Yale Blvd NE AlbuquerqueNM87106 United States Astronomy Unit Department of Physics University of Trieste via Tiepolo 11 Trieste34131 Italy INAF Osservatorio Astronomico di Trieste via Tiepolo 11 Trieste34131 Italy IFPU - Institute for Fundamental Physics of the Universe Via Beirut 2 Trieste340 Italy Department of Physics and Astronomy University of Pennsylvania 209 South 33rd Street PhiladelphiaPA19104 United States NASA/Goddard Space Flight Center GreenbeltMD20771 United States Department of Applied Mathematics and Theoretical Physics University of Cambridge CambridgeCB3 0WA United Kingdom Department of Physics and Astronomy Haverford College 370 Lancaste

CMB-HD is a proposed millimeter-wave survey over half the sky that would be ultra-deep (0.5 µK-arcmin) and have unprecedented resolution (15 arcseconds at 150 GHz). Such a survey would answer many outstanding questions about the fundamental physics of the Universe. Major advances would be 1.) the use of gravitational lensing of the primordial microwave background to map the distribution of matter on small scales (k ∼ 10 hMpc-1), which probes dark matter particle properties. It will also allow 2.) measurements of the thermal and kinetic Sunyaev-Zel’dovich effects on small scales to map the gas density and velocity, another probe of cosmic structure. In addition, CMB-HD would allow us to cross critical thresholds: 3.) ruling out or detecting any new, light ( © 2022, CC BY.

关键词： Telescopes

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