The MUSE Hubble Ultra Deep Field Survey XIV. The evolution of the Lya emitter fraction from z=3 to z=6
Haruka Kusakabe, Jeremy Blaizot, Thibault Garel, Anne Verhamme, Roland Bacon, Johan Richard, Takuya Hashimoto, Hanae Inami, Simon Conseil, Bruno Guiderdoni, Aly… 展开作者
Haruka Kusakabe, Jeremy Blaizot, Thibault Garel, Anne Verhamme, Roland Bacon, Johan Richard, Takuya Hashimoto, Hanae Inami, Simon Conseil, Bruno Guiderdoni, Alyssa B. Drake, Edmund Christian Herenz, Joop Schaye, Pascal Oesch, Jorryt Matthee, Raffaella Anna Marino, Kasper Borello Schmidt, Roser Pello, Michael Maseda, Floriane Leclercq, Josephine Kerutt, Guillaume Mahler
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25 pages, 17 figures, 5 tables, accepted for publication in A&A
The Lya emitter (LAE) fraction, X_LAE, is a potentially powerful probe of the evolution of the intergalactic neutral hydrogen gas fraction. However, uncertainties in the measurement of X_LAE are still debated. Thanks to deep data obtained with MUSE, we can measure the evolution of X_LAE homogeneously over a wide redshift range of z~3-6 for UV-faint galaxies (down to M_1500~-17.75). This is significantly fainter than in former studies, and allows us to probe the bulk of the population of high-z star-forming galaxies. We construct a UV-complete photo-redshift sample following UV luminosity functions and measure the Lya emission with MUSE using the second data release from the MUSE HUDF Survey. We derive the redshift evolution of X_LAE for M_1500 in [-21.75;-17.75] for the first time with a equivalent width range EW(Lya)>=65 A and find low values of X_ LAE<~30% at z<~6. For M_1500 in [-20.25;-18.75] and EW(Lya)<~25 A, our X_LAE values are consistent with those in the literature within 1sigma at z<~5, but our median values are systematically lower than reported values over the whole redshift range. In addition, we do not find a significant dependence of X_LAE on M_1500 for EW(Lya)>~50 A at z~3-4, in contrast with previous work. The differences in X_LAE mainly arise from selection biases for Lyman Break Galaxies (LBGs) in the literature: UV-faint LBGs are more easily selected if they have strong Lya emission, hence X_LAE is biased towards higher values. Our results suggest either a lower increase of X_LAE towards z~6 than previously suggested, or even a turnover of X_LAE at z~5.5, which may be the signature of a late or patchy reionization process. We compared our results with predictions from a cosmological galaxy evolution model. We find that a model with a bursty star formation (SF) can reproduce our observed X_LAE much better than models where SF is a smooth function of time.
MUSE-ALMA Haloes XIV: The ALMA Large Programme Data Release
European Southern Observatory（欧洲南方天文台）；Max-Planck-Institut für Extraterrestrische Physik (MPE)（马克斯·普朗克地外物理研究所（MPE））；Swinburne University of Technology（斯威本科技大学）；CSIRO Space and Astronomy（CSIRO空间与天文学部）；Aix Marseille Univ.（艾克斯-马赛大学）；CNRS（法国国家科学研究中心）；Laboratoire d’Astrophysique de Marseille（马赛天体物理实验室）；Leibniz-Institut für Astrophysik Potsdam (AIP)（莱布尼茨波茨坦天体物理研究所（AIP））；Max-Planck-Institut für Astrophysik (MPA)（马克斯·普朗克天体物理研究所（MPA））；Observatoire Astronomique de Strasbourg（斯特拉斯堡天文台）
MusE GAs FLOw and Wind (MEGAFLOW) XIV: Background-Galaxy Absorption Reveals Kiloparsec-Scale Structure in the Cool Circumgalactic Medium
Arizona State University（亚利桑那州立大学）；Univ Lyon, Univ Lyon1, Ens de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon UMR5574（里昂大学、里昂第一大学、巴黎高等师范学校里昂分校、法国国家科学研究中心、里昂天体物理研究中心）；Universität Potsdam（波茨坦大学）；Johns Hopkins University（约翰斯·霍普金斯大学）；Leiden University（莱顿大学）；Inter-University Centre for Astronomy & Astrophysics（大学间天文与天体物理中心）；Leibniz-Institut für Astrophysik Potsdam (AIP)（波茨坦阿基米德天体物理研究所）
Ejecta clumps revealed by study of reverse-shocked ejecta through MUSE integral field spectroscopy of SNR 0509-67.5
The University of New South Wales（新南威尔士大学）；Australian National University（澳大利亚国立大学）；Naval Research Laboratory（海军研究实验室）；The University of Manitoba（曼尼托巴大学）；RIKEN Center for Interdisciplinary Theoretical and Mathematical Sciences (iTHEMS)（理化学研究所跨学科理论与数学科学中心（iTHEMS））
SILVERRUSH. XIV. Lya Luminosity Functions and Angular Correlation Functions from ~20,000 Lya Emitters at z~2.2-7.3 from upto 24 ${\rm deg}^2$ HSC-SSP and CHORUS Surveys: Linking the Post-Reionization Epoch to the Heart of Reionization
MUSE Integral Field Observations of the Oxygen-rich SNR 1E 0102.2-7219
我们在赛丁泉天文台用积分场光谱仪WiFeS对富氧SNR 1 E 0102.2-7219进行了观测，首次发现了富硫喷出物。后续的深DDT观测与MUSE对VLT（源上的8100 s）导致了快速移动的氢以及富氩和富氯物质的额外发现。快速移动的氢结的探测挑战了1 E 0102的祖先是沃尔夫-拉叶星的致密核心的解释，该恒星已经摆脱了整个外壳。除了探测到氢和氧燃烧的产物之外，这张前所未有的清晰（0.2”的光谱尺寸，约0.7”的视宁度）和麦哲伦云中富含氧的SNR的深MUSE视图揭示了进一步令人兴奋的发现，包括[Fe xiv]λ5303和[Fe xi]λ7892发射，我们将其与前向冲击波联系起来。我们提出了这个令人兴奋的数据集，并讨论了它的爆炸机制和相关的超新星核合成的一些影响。
MUSEQuBES: The Column Density, Covering Fraction, Mass, and Environmental Dependence of Cool HI Gas Around Low-Redshift Galaxies
Inter-University Centre for Astronomy & Astrophysics（星际大学天文学与天体物理中心）；Leiden Observatory（莱顿天文台）；Department of Astronomy, University of Michigan（密歇根大学天文学系）；Centre de Recherche Astrophysique de Lyon (CRAL) UMR5574, Univ Lyon1, Ens de Lyon, CNRS（里昂天体物理学研究中心（CRAL）UMR5574，里昂第一大学，里昂高等师范学校，法国国家科学研究中心）；Leibniz-Institut für Astrophysik Potsdam (AIP)（波茨坦阿斯特拉物理学会（莱布尼兹研究所））；Department of Physics, University of Milan Bicocca（米兰比可卡大学物理系）；Department of Astronomy and Astrophysics, The University of Chicago（芝加哥大学天文学与天体物理学系）；Institut für Physik und Astronomie, Universität Potsdam（波茨坦大学物理与天文学研究所）
Disentangling the galactic and intergalactic components in 313 observed Lyman-alpha line profiles between redshift 0 and 5
Observatori Astronòmic de la Universitat de València（瓦伦西亚大学天文台）；Departament d’Astronomia i Astrofísica, Universitat de València（瓦伦西亚大学天文学与天体物理学系）；Universität Heidelberg（海德堡大学）；Max Planck Institute for Astrophysics（马克斯·普朗克天体物理学研究所）；Tsinghua University（清华大学）；IFCA-CSIC/Universitat de València（坎塔布里亚物理研究所CSIC-瓦伦西亚大学联合单位）；Instituto de Física de Cantabria (CSIC-UC)（坎塔布里亚物理研究所）
SILVERRUSH. IX. Lya Intensity Mapping with Star-Forming Galaxies at z=5.7 and 6.6: A Possible Detection of Extended Lya Emission at $\gtrsim$100 comoving kpc around and beyond the Virial-Radius Scale of Galaxy Dark Matter Halos
GA-NIFS: AGN activity in a Lyα emitter within a triple-AGN system anchored by a passive galaxy at z=3
Centro de Astrobiología (CAB), CSIC–INTA（天体生物学中心（CAB），西班牙国家航空航天技术研究所与西班牙国家科学研究委员会联合）；Kavli Institute for Cosmology, University of Cambridge（剑桥大学卡弗里宇宙学研究所）；Cavendish Laboratory - Astrophysics Group, University of Cambridge（剑桥大学卡文迪许实验室天体物理组）；Department of Physics, University of Oxford（牛津大学物理系）；Scuola Normale Superiore（比萨高等师范学院）；Sorbonne Université, CNRS, UMR 7095, Institut d’Astrophysique de Paris（索邦大学，法国国家科学研究中心，UMR 7095，巴黎天体物理研究所）；Department of Physics and Astronomy, University College London（伦敦大学学院物理与天文系）
A Lyman continuum analysis for $\sim 100$ galaxies at $z_{\text{spec}} \sim 3$ in the Abell 2744 Cluster Field
INAF – Osservatorio Astronomico di Roma（意大利国家天体物理研究所罗马天文台）；Department of Astronomy, School of Physics, Peking University（北京大学物理学院天文学系）；Kavli Institute for Astronomy and Astrophysics, Peking University（北京大学科维理天文与天体物理研究所）；Institute of Science and Technology Austria (ISTA)（奥地利科学技术研究所）；INAF – Osservatorio Astronomico di Padova（意大利国家天体物理研究所帕多瓦天文台）；IPAC, California Institute of Technology（加州理工学院IPAC）；Dipartimento di Fisica, Università degli Studi di Milano（米兰大学物理系）；University of Ljubljana, Faculty of Mathematics and Physics（卢布尔雅那大学数学与物理学院）；Department of Physics and Astronomy, University of California Davis（加州大学戴维斯分校物理与天文学系）；Centre for Astrophysics and Supercomputing, Swinburne University of Technology（斯威本科技大学天体物理学与超级计算中心）；Space Telescope Science Institute（太空望远镜科学研究所）
