JADES: Differing assembly histories of galaxies -- Observational evidence for bursty SFHs and (mini-)quenching in the first billion years of the Universe
Tobias J. Looser, Francesco D'Eugenio, Roberto Maiolino, Sandro Tacchella, Mirko Curti, Santiago Arribas, William M. Baker, Stefi Baum, Nina Bonaventura, Krista… 展开作者
Tobias J. Looser, Francesco D'Eugenio, Roberto Maiolino, Sandro Tacchella, Mirko Curti, Santiago Arribas, William M. Baker, Stefi Baum, Nina Bonaventura, Kristan Boyett, Andrew J. Bunker, Stefano Carniani, Stephane Charlot, Jacopo Chevallard, Emma Curtis-Lake, A. Lola Danhaive, Daniel J. Eisenstein, Anna de Graaff, Kevin Hainline, Zhiyuan Ji, Benjamin D. Johnson, Nimisha Kumari, Erica Nelson, Eleonora Parlanti, Hans-Walter Rix, Brant Robertson, Bruno Rodríguez Del Pino, Lester Sandles, Jan Scholtz, Renske Smit, Daniel P. Stark, Hannah Übler, Christina C. Williams, Chris Willott, Joris Witstok
We use deep NIRSpec spectroscopic data from the JADES survey to derive the star formation histories (SFHs) of a sample of 200 galaxies at 0.6$<$z$<$11 and spanning stellar masses from $\rm 10^6$ to $\rm 10^{9.5}~M_\odot$. We find that galaxies at high-redshift, galaxies above the Main Sequence (MS) and low-mass galaxies tend to host younger stellar populations than their low-redshift, massive, and below the MS counterparts. Interestingly, the correlation between age, M$_*$ and SFR existed even earlier than Cosmic Noon, out to the earliest cosmic epochs. However, these trends have a large scatter. Indeed, there are examples of young stellar populations also below the MS, indicating recent (bursty) star formation in evolved systems. We explore further the burstiness of the SFHs by using the ratio between SFR averaged over the last 10 Myr and averaged between 10 Myr and 100 Myr before the epoch of observation ($\mathrm{SFR_{cont, 10}/SFR_{cont, 90}}$). We find that high-redshift and low-mass galaxies have particularly bursty SFHs, while more massive and lower-redshift systems evolve more steadily. We also present the discovery of another (mini-)quenched galaxy at z = 4.4 (in addition to the one at z=7.3 reported by Looser et al. 2023), which might be only temporarily quiescent as a consequence of the extremely bursty evolution. Finally, we also find a steady decline of dust reddening of the stellar population approaching the earliest cosmic epochs, although some dust reddening is still observed in some of the highest redshift and most star forming systems.
Understanding the rate at which stars form is central to studies of galaxy formation. Observationally, the star formation rates (SFRs) of galaxies are measured using the luminosity in different frequency bands, often under the assumption of a time-steady SFR in the recent past. We use star formation histories (SFHs) extracted from cosmological simulations of star-forming galaxies from the FIRE project to analyze the time-scales to which the H$α$ and far-ultraviolet (FUV) continuum SFR indicators are sensitive. In these simulations, the SFRs are highly time variable for all galaxies at high red…
We present a new derivation of the star formation history (SFH) of the dSph galaxy Fornax in two central regions, characterised by unprecedented precision and age resolution. It reveals that star formation has proceeded in sharp bursts separated by periods of low-level or quiescent activity. The SFH was derived through colour-magnitude diagram (CMD) fitting of two extremely deep Hubble Space Telescope CMDs, sampling the centre and one core radius. The attained age resolution allowed us to single out a major star formation episode at early times, a second strong burst $4.6\pm0.4$ Gyr ago and re…
The Star-forming Main Sequence and Bursty Star-formation Histories at $z>1.4$ in JADES and AURORA
University of California, Los Angeles（加州大学洛杉矶分校）；Steward Observatory, University of Arizona（亚利桑那大学斯图尔德天文台）；Cosmic Dawn Center (DAWN)（宇宙黎明中心）；Niels Bohr Institute, University of Copenhagen（哥本哈根大学尼尔斯玻尔研究所）；University of Kentucky（肯塔基大学）；Department of Physics & Astronomy, University of California, Riverside（加州大学河滨分校物理与天文学系）
Stochastic star formation activity of galaxies within the first billion years probed by JWST
Aix Marseille Univ, CNRS, CNES, LAM（艾克斯-马赛大学）；Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange（蔚蓝海岸大学，蔚蓝海岸天文台）；Institut d’Astrophysique de Paris, UMR 7095, CNRS, Sorbonne Université（巴黎天体物理研究所，索邦大学）；Cosmic Dawn Center (DAWN)（宇宙黎明中心）；Niels Bohr Institute, University of Copenhagen（哥本哈根大学尼尔斯·玻尔研究所）；Department of Astronomy, University of Geneva（日内瓦大学天文学系）
UNCOVER/MegaScience Finds Uniform and Highly Bursty Star Formation at 3 < z < 9, consistent with the High-Redshift UV Luminosity Function
University of Colorado, Boulder（科罗拉多大学博尔德分校）；The Pennsylvania State University（宾夕法尼亚州立大学）；University of Pittsburgh（匹兹堡大学）；Princeton University（普林斯顿大学）；University of Washington（华盛顿大学）；Swinburne University of Technology（斯威本科技大学）；Space Telescope Science Institute (STScI)（太空望远镜科学研究所）；MIT Kavli Institute for Astrophysics and Space Research（麻省理工学院卡弗里天体物理与空间研究所）；Kapteyn Astronomical Institute, University of Groningen（格罗宁根大学卡普坦天文研究所）；University of Toronto（多伦多大学）；University of Zurich（苏黎世大学）；The University of Texas at Austin（德克萨斯大学奥斯汀分校）；Ben-Gurion University of the Negev（内盖夫本-古里安大学）；University of California, Berkeley（加州大学伯克利分校）；Cosmic Dawn Center (DAWN), Niels Bohr Institute, University of Copenhagen（哥本哈根大学尼尔斯·玻尔研究所宇宙黎明中心（DAWN））；University of Massachusetts, Amherst（马萨诸塞大学阿默斯特分校）；Tufts University（塔夫茨大学）
UNCOVER/MegaScience 发现 3 < z < 9 范围内恒星形成具有均匀且高度爆发性，与高红移紫外光度函数一致。
It's More Complicated Than You Think: A Forward Model to Infer the Recent Star Formation History, Bursty or Not, of Galaxy Populations
The Pennsylvania State University（宾夕法尼亚州立大学）；Princeton University（普林斯顿大学）；Wesleyan University（卫斯理安大学）；Columbia University（哥伦比亚大学）；Flatiron Institute（平井研究所）
Simulation-based inference of galaxy properties from JWST pixels
Instituto de Astrofísica de Canarias（加那利天体物理研究所）；Universidad de La Laguna（拉古纳大学）；Observatoire de Paris, LERMA, PSL University（巴黎天文台，PSL大学）；Université Paris-Cité（巴黎西岱大学）；Centro de Astrobiología (CAB), CSIC-INTA（天体生物学中心（CSIC-INTA））；University of Arizona（亚利桑那大学）；Space Telescope Science Institute（太空望远镜科学研究所）；The University of Texas at Austin（德克萨斯大学奥斯汀分校）
IRAC data have long implied that early ($z\gtrsim6$) galaxies often have very high specific star formation rates (sSFR$\gtrsim$30 Gyr$^{-1}$), but JWST data have shown that at least some early galaxies are forming stars far less vigorously. Here, we systematically analyze the recent star formation histories (SFHs) of a large ($N=368$) sample of $z\sim6$ Lyman-break galaxies (LBGs) spanning $-22\lesssim M_\mathrm{UV}\lesssim-16$ assembled from ACS+NIRCam imaging in the GOODS and Abell 2744 fields. We find that very low H$α$-to-UV luminosity ratios ($L_\mathrm{Hα}/L_\mathrm{UV}$) and strong rece…
The JADES Mass-Metallicity and Fundamental Metallicity Relations at $z\gtrsim2$ Using New High-Redshift Metallicity Calibrations
University of California, Los Angeles（加州大学洛杉矶分校）；University of Kentucky（肯塔基大学）；Steward Observatory, University of Arizona（亚利桑那大学斯图尔德天文台）；Cosmic Dawn Center (DAWN)（宇宙黎明中心（DAWN））；Niels Bohr Institute, University of Copenhagen（哥本哈根大学尼尔斯·玻尔研究所）；Department of Physics & Astronomy, University of California, Riverside（加州大学河滨分校物理与天文学系）
REBELS-IFU: Steeply rising star formation histories and the importance of dust obscuration in massive $z \simeq7$ galaxies revealed by multi-wavelength observations
Measuring the delay time distribution of binary neutron stars. III. Using the individual star formation histories of gravitational wave event host galaxies in the local universe
在论文I（Safarzadeh & Berger 2019）中，我们研究了通过晕/恒星质量与本地宇宙中承载引力波（GW）事件的星系的恒星形成历史（SFH）之间的标度关系来确定双星中子星（BNS）的延迟时间分布（DTD）。在这里，我们将探讨如何详细重建的BNS合并宿主星系的单个SFH可以提高使用的标度关系。我们使用星系和质量大会（GAMA）调查，这是质量完整的$M_*>10^9$ M $_\odot$在红移范围$0.05<z<0.08$的星系。我们使用重建的SFH来自探矿者代码，为两个不同的先验集合（有利于连续和突发SFH），卷积那些与幂律DTDs的特征在于一个指数$Γ$和最小延迟时间$t_{\rm min}$。我们发现，这种方法的$\mathcal{O}(100)-\mathcal{O}(300)$主机星系需要约束的DTD参数，与数量取决于选择的SFH前和真正的DTD的参数。我们进一步表明，只使用BNS合并的宿主星系，而不是在相关的宇宙体积的潜在的宿主星系的全部人口，导致在恢复的DTD参数的微小偏差。相对于使用标度关系的方法，所需的宿主星系样本大小几乎要小一个数量级，我们预计在第三代GW探测器出现之前，在十年或二十年内收集到这样的宿主星系样本。
Caught Napping by JWST UNCOVER+MegaScience: Constraining bursty star formation histories and number densities of mini-quenched galaxies at redshifts 4-7
University of Washington（华盛顿大学）；University of Pittsburgh（匹兹堡大学）；University of Colorado, Boulder（科罗拉多大学博尔德分校）；University of California, Santa Cruz（加州大学圣克鲁兹分校）；Princeton University（普林斯顿大学）
Probing the Star Formation Main Sequence down to 10$^{7} M_\odot$ at $1 < z < 9$
Saint Mary’s University（圣玛丽大学）；Columbia University（哥伦比亚大学）；Space Telescope Science Institute（太空望远镜科学研究所）；National Research Council of Canada, Herzberg Astronomy & Astrophysics Research Centre（加拿大国家研究委员会赫茨伯格天文学与天体物理学研究中心）；University of California Davis（加州大学戴维斯分校）；University of Groningen（格罗宁根大学）；York University（约克大学）
本研究通过结合多源数据，探测1 < z < 9范围内10^7 M_太阳的恒星形成主序列，揭示了不同质量范围内的恒星形成历史及演化特征。
MUSE-DARK IV. Comparing Dark Matter Densities to Star Formation Histories in 375 intermediate-z galaxies
Université Lyon 1, ENS de Lyon, CNRS, CRAL（里昂第一大学，巴黎高等师范学院里昂分校，法国国家科学研究中心，里昂银河系与天体物理实验室）；Leibniz-Institut für Astrophysik Potsdam (AIP)（波茨坦莱布尼茨天体物理研究所）；Univ. de Strasbourg, CNRS, Observatoire astronomique de Strasbourg（斯特拉斯堡大学，法国国家科学研究中心，斯特拉斯堡天文台）；Institute of Cosmology & Gravitation, University of Portsmouth（朴茨茅斯大学宇宙学与引力研究所）
Mergers lighting the early Universe: modest star formation enhancement without evidence for AGN or Ly$α$ triggering
University of Cambridge（剑桥大学）；Kavli Institute for Cosmology（卡弗里宇宙学研究所）；Universidad de Chile（智利大学）；Niels Bohr Institute, University of Copenhagen（哥本哈根大学尼尔斯·玻尔研究所）
The evolution of [OIII]$+\rm{H}β$ equivalent width from $\mathbf{z\simeq3-8}$: implications for the production and escape of ionizing photons during reionization
