A comprehensive study of H$α$ emitters at $z \sim$ 0.62 in the DAWN survey: the need for deep and wide regions
Santosh Harish, Alicia Coughlin, James E. Rhoads, Sangeeta Malhotra, Steven L. Finkelstein, Matthew Stevans, Vithal S. Tilvi, Ali Ahmad Khostovan, Sylvain Veill… 展开作者
Santosh Harish, Alicia Coughlin, James E. Rhoads, Sangeeta Malhotra, Steven L. Finkelstein, Matthew Stevans, Vithal S. Tilvi, Ali Ahmad Khostovan, Sylvain Veilleux, Junxian Wang, Pascale Hibon, Johnnes Zabl, Bhavin Joshi, John Pharo, Isak Wold, Lucia A. Perez, Zhen-Ya Zheng, Ronald Probst, Rob Swaters, Bahram Mobasher, Tianxing Jiang, Huan Yang
备注:
16 pages, 8 figures, Accepted for publication in ApJ
我们提出了新的估计的光度函数(LF)和恒星形成率密度(SFRD)的H $α$选择的样品在$z\sim0.62$从深宽窄波段(DAWN)调查。我们的结果基于扩展COSMOS区域中的新H $α$样本(与Coughlin等人2018年相比),包含侧翼字段,导致$\sim$ 1.5 deg $^2$的总面积覆盖。共有241 H $α$发射器选择了强大的选择标准的基础上,使用分光光度红移和宽带颜色颜色分类。我们探索不同的尘埃修正处方的影响,通过计算LF和SFRD使用恒定的尘埃消光校正,A{ $_{\textrm{H}α}=1$ } mag,亮度相关的校正,和恒星质量相关的校正。由此产生的H $α$ LF很好地拟合使用Schechter函数与最佳拟合参数:L $^*=10^{42.24}$ erg s $^{-1}$,$ϕ^*=10^{-2.85}$ Mpc $^{-3}$,$α= -1.62$为常数尘埃校正,L $^*=10^{42.31}$ erg s $^{-1}$,$ϕ^*=10^{-2.8}$ Mpc $^{-3}$,$α=-1.39$为光度依赖的尘埃校正,和L $^*=10^{42.36}$ erg s $^{-1}$,$ϕ^*=10^{-2.91}$ Mpc $^{-3}$,$α= -1.48$,恒星质量依赖的尘埃校正。DAWN巡天的深度和广度可以有效地对H $α$发射体在很宽的光度范围内进行采样,从而对LF的暗端和亮端提供更好的约束。此外,SFRD估算的$ρ_{\textrm{SFR}}=10^{-1.39}$ M $_{\odot}$ yr $^{-1}$ Mpc $^{-3}$(常数尘埃修正)、$ρ_{\textrm{SFR}}=10^{-1.47}$ M $_{\odot}$ yr $^{-1}$ Mpc $^{-3}$(光度相关尘埃修正)和$ρ_{\textrm{SFR}}=10^{-1.49}$ M $_{\odot}$ yr $^{-1}$ Mpc $^{-3}$(恒星质量相关尘埃修正)与从以前的H $α$巡天中看到的SFRD随红移的演化($0 < z < 2$)非常一致。
英文摘要:
We present new estimates of the luminosity function (LF) and star formation rate density (SFRD) for an H$α$ selected sample at $z\sim0.62$ from the Deep And Wide Narrow-band (DAWN) survey. Our results are based on a new H$α$ sample in the extended COSMOS region (compared to Coughlin et al. 2018) with the inclusion of flanking fields, resulting in a total area coverage of $\sim$1.5 deg$^2$. A total of 241 H$α$ emitters were selected based on robust selection criteria using spectro-photometric redshifts and broadband color-color classification. We explore the effect of different dust correction prescriptions by calculating the LF and SFRD using a constant dust extinction correction, A{$_{\textrm{H}α}=1$} mag, a luminosity-dependent correction, and a stellar-mass dependent correction. The resulting H$α$ LFs are well fitted using Schechter functions with best-fit parameters: L$^*=10^{42.24}$ erg s$^{-1}$, $ϕ^*=10^{-2.85}$ Mpc$^{-3}$, $α= -1.62$ for constant dust correction, L$^*=10^{42.31}$ erg s$^{-1}$, $ϕ^*=10^{-2.8}$ Mpc$^{-3}$, $α=-1.39$ for luminosity-dependent dust correction, and L$^*=10^{42.36}$ erg s$^{-1}$, $ϕ^*=10^{-2.91}$ Mpc$^{-3}$, $α= -1.48$, for stellar mass-dependent dust correction. The deep and wide nature of the DAWN survey effectively samples H$α$ emitters over a wide range of luminosities, thereby providing better constraints on both the faint and bright end of the LF. Also, the SFRD estimates $ρ_{\textrm{SFR}}=10^{-1.39}$ M$_{\odot}$yr$^{-1}$Mpc$^{-3}$ (constant dust correction), $ρ_{\textrm{SFR}}=10^{-1.47}$ M$_{\odot}$yr$^{-1}$Mpc$^{-3}$ (luminosity-dependent dust correction), and $ρ_{\textrm{SFR}}=10^{-1.49}$ M$_{\odot}$yr$^{-1}$Mpc$^{-3}$ (stellar mass-dependent dust correction) are in good agreement with the evolution of SFRD across redshifts ($0 < z < 2$) seen from previous H$α$ surveys.
Extreme Enrichment at Cosmic Dawn: Three FeII-Strong Quasars at z > 6 from the JWST Aether survey
NSF NOIRLab, Gemini Observatory(美国国家光学红外天文实验室,双子座天文台);International Gemini Observatory/NSF NOIRLab(国际双子座天文台/美国国家光学红外天文实验室);INAF – Osservatorio di Astrofisica e Scienza dello Spazio di Bologna(意大利国家天体物理研究所博洛尼亚天文与空间科学观测站);Institute for Theoretical Physics, Heidelberg University(海德堡大学理论物理研究所);Max-Planck-Institut für Astrophysik(马克斯·普朗克天体物理学研究所);Max-Planck-Institut für Astronomie(马克斯·普朗克天文学研究所);INAF-Osservatorio di Astrofisica e Scienza dello Spazio(意大利国家天体物理研究所天文与空间科学观测站);Dipartimento di Fisica Enrico Fermi, Università di Pisa(比萨大学恩里科·费米物理系)
Ultraviolet photon production rates of the first stars: Impact on the He II $λ$ 1640 Å emission line from primordial star clusters and the 21-cm signal from cosmic dawn
Uppsala University(乌普萨拉大学);University of Cambridge(剑桥大学);Indian Institute of Technology Indore(印度理工学院印多尔分校)
研究第一颗恒星的紫外光子产率及其对He II 1640 Å发射线和宇宙黎明时期21厘米信号的影响,探讨初始质量和旋转对光子产率的影响。
Accelerated evolution of galaxy host halo masses during Cosmic Dawn from deep JWST clustering
University of Melbourne(墨尔本大学);ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)(三维全天空天体物理学ARC卓越中心);National Astronomical Research Institute of Thailand (NARIT)(泰国国家天文研究所)
Instituto de Astronomía y Física del Espacio, CONICET–UBA(空间物理与天文学研究所,阿根廷国家科学和技术研究委员会-布宜诺斯艾利斯大学);Departamento de Fisica Teorica, Universidad Autonoma de Madrid(马德里自治大学理论物理系);CIAFF, Facultad de Ciencias, Universidad Autonoma de Madrid(马德里自治大学理学院CIAFF)
Lyman-alpha Radiation Pressure in Dense Star Clusters: Implications for Star Formation and Winds at Cosmic Dawn
Center for Computational Astrophysics, Flatiron Institute(平顿研究所计算天体物理中心);Department of Physics and Astronomy, Rutgers University(罗格斯大学物理与天文系);Department of Physics, The University of Texas at Dallas(德克萨斯大学达拉斯分校物理系)
Galaxy Zoo: Cosmic Dawn -- morphological classifications for over 41,000 galaxies in the Euclid Deep Field North from the Hawaii Two-0 Cosmic Dawn survey
The Open University(开放大学);University of Toronto(多伦多大学);University of Minnesota(明尼苏达大学);European Space Agency (ESA)(欧洲航天局);Haverford College(哈弗福德学院);Lancaster University(兰卡斯特大学);University of Oxford(牛津大学)
No evolution in the number density of little red dots from cosmic dawn to cosmic noon
INAF – Osservatorio di Astrofisica e Scienza dello Spazio di Bologna(意大利国家天体物理研究所博洛尼亚天文与空间科学观测站);Dipartimento di Fisica e Astronomia, Università di Bologna(博洛尼亚大学物理与天文系);Space Telescope Science Institute for the European Space Agency (ESA), ESA Office(欧洲空间局太空望远镜科学研究所);The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University(约翰斯·霍普金斯大学威廉·H·米勒三世物理与天文系);INAF – Arcetri Astrophysical Observatory(意大利国家天体物理研究所阿切尔奇天文台)
Reaching the Metallicity Floor at $z\sim 10$: Lensed Star Clusters at Cosmic Dawn and Cosmic Noon
ICC, University of Barcelona(巴塞罗那大学天体物理学与气候研究所);ICREA(加泰罗尼亚高级研究院);Dipartimento di Fisica e Astronomia “Augusto Righi”–Università di Bologna(博洛尼大学物理与天文系);INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna(意大利国家天体物理研究所博洛尼亚空间天体物理与天文观测站)