观测到的低红移星系的恒星形成率(SFR)和它们的射电连续发光度之间的经验关系提供了一种潜在的方法来测量高红移星系的SFR,不受尘埃遮蔽的影响。在这项研究中,我们首次使用尘埃校正的H $α$ SFR在高红移下对SFR-射电连续谱关系中的红移演化进行了测试。我们的样本由来自$1.4 < z < 2.6$的MOSFIRE深演化场(MOSDEF)巡天的178个星系组成,这些星系具有静止标架光谱学和来自Karl G. Jansky甚大阵列(VLA)货物北场。使用叠加分析,我们比较观测到的无线电连续发光与预测的灰尘校正H $α$ SFR假设范围内的$z\sim0$关系。我们没有发现一个系统的演化与红移的证据时,堆积的无线电连续作为一个功能的尘埃校正H $α$ SFR和堆积时,光谱和无线电连续作为恒星质量的函数。我们的结论是,本地校准的SFR和无线电连续发光度之间的关系仍然有效的$z\sim 2$。
英文摘要:
The observed empirical relation between the star-formation rates (SFR) of low-redshift galaxies and their radio continuum luminosity offers a potential means of measuring SFR in high redshift galaxies that is unaffected by dust obscuration. In this study, we make the first test for redshift evolution in the SFR-radio continuum relation at high redshift using dust-corrected H$α$ SFR. Our sample consists of 178 galaxies from the MOSFIRE Deep Evolution Field (MOSDEF) Survey at $1.4 < z < 2.6$ with rest-frame optical spectroscopy and deep 1.5 GHz radio continuum observations from the Karl G. Jansky Very Large Array (VLA) GOODS North field. Using a stacking analysis we compare the observed radio continuum luminosities with those predicted from the dust-corrected H$α$ SFR assuming a range of $z\sim0$ relations. We find no evidence for a systematic evolution with redshift, when stacking the radio continuum as a function of dust-corrected H$α$ SFR and when stacking both optical spectroscopy and radio continuum as a function of stellar mass. We conclude that locally calibrated relations between SFR and radio continuum luminosity remain valid out to $z\sim 2$.
FRESCO: Constraining Dust Attenuation and Star-Formation Rates of $z\sim 2$ Star-Forming Galaxies with JWST Paschen and Ground-Based Balmer Emission Line Observations
University of California, Riverside(加州大学河滨分校);University of Geneva(日内瓦大学);Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯·玻尔研究所);Institute of Science and Technology Austria (ISTA)(奥地利科学技术研究院);Yale University(耶鲁大学);Centro de Astrobiología (CAB), CSIC-INTA(天体生物学中心(CSIC-INTA));University of California, Los Angeles(加州大学洛杉矶分校)
Tracing cosmic star formation history through radio continuum spectral energy distribution and non-thermal emission
Yunnan Observatories, Chinese Academy of Sciences(中国科学院云南天文台);Institute for Research in Fundamental Sciences (IPM)(伊朗基础科学研究所);University of Cologne(科隆大学);International Centre for Radio Astronomy Research, Curtin University(西澳大学国际射电天文研究中心);Hunan Normal University(湖南师范大学);Nanjing University(南京大学);National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台);Academia Sinica(中央研究院);University of Hertfordshire(赫特福德大学);University of the Western Cape(西开普大学)
The AURORA Survey: Multiple Balmer and Paschen Emission Lines for Individual Star-forming Galaxies at z=1.5-4.4. II. Implications for Nebular Dust Corrections, Nebular SFRs, and Differential Reddening
University of California, Riverside(加州大学河滨分校);University of California, Los Angeles(加州大学洛杉矶分校);University of California, Davis(加州大学戴维斯分校);University of Arizona(亚利桑那大学);Max-Planck-Institut für extraterrestrische Physik(马克斯·普朗克地外物理学研究所);California Institute of Technology(加州理工学院);University College London(伦敦大学学院)
Vz-GAL Dusty Star-Forming Galaxies: Revisiting the CO-H2 Conversion Factor Tension
International Max Planck Research School (IMPRS) for Astronomy & Astrophysics(国际天文学与天体物理学马克斯·普朗克高等研究所);Institute for Astrophysics, University of Cologne(科隆大学天体物理研究所);Max Planck Institute for Radio Astronomy (MPIfR)(马克斯·普朗克射电天文研究所);Departement of Space, Earth & Environment, Chalmers University of Technology(查尔姆斯理工大学空间、地球与环境系);Leiden Observatory, Leiden University(莱顿大学莱顿天文台);Université 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);Sorbonne Université, Université Paris 6 and CNRS, Institut d’Astrophysique de Paris(索邦大学,巴黎第六大学及法国国家科学研究中心,巴黎天体物理研究所);Department of Physics and Astronomy, Rutgers University—New Brunswick(罗格斯大学(新不伦瑞克校区)物理与天文学系);Department of Physics and Astronomy, University of the Western Cape(西开普大学物理与天文学系);Institut de Radioastronomie Millimétrique (IRAM)(毫米波射电天文研究所)