On the faint-end of the high-z galaxy luminosity function
文献类型：期刊论文
| 作者 | Yue, Bin1; Ferrara, Andrea1,2; Xu, Yidong3
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2016-12-01 |
| 卷号 | 463期号:2页码:1968-1979 |
| 关键词 | galaxies: high-redshift cosmology: observations cosmology: theory dark ages, reionization, first stars |
| 英文摘要 | Recent measurements of the luminosity function (LF) of galaxies in the Epoch of Reionization (EoR, z greater than or similar to 6) indicate a very steep increase of the number density of low-mass galaxies populating the LF faint-end. However, as star formation in low-mass haloes can be easily depressed or even quenched by ionizing radiation, a turnover is expected at some faint UV magnitudes. Using a physically motivated analytical model, we quantify reionization feedback effects on the LF faint-end shape. We find that if reionization feedback is neglected, the power-law Schechter parametrization characterizing the LF faint-end remains valid up to absolute UV magnitude similar to-9. If instead radiative feedback is strong enough that quenches star formation in haloes with circular velocity smaller than 50 km s(-1), the LF starts to drop at absolute UV magnitude similar to-15, i.e. slightly below the detection limits of current (unlensed) surveys at z similar to 5. The LFs may rise again at higher absolute UV magnitude, where, as a result of interplay between reionization process and galaxy formation, most of the galaxy light is from relic stars formed before the EoR. We suggest that the galaxy number counts data, particularly in lensed fields, can put strong constraints on reionization feedback. In models with stronger reionization feedback, stars in galaxies with absolute UV magnitude higher than similar to-13 and smaller than similar to-8 are typically older. Hence, the stellar age-UV magnitude relation can be used as an alternative feedback probe. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | STAR-FORMATION RATE ; HIGH-REDSHIFT GALAXIES ; SIMILAR-TO 4 ; HUBBLE FRONTIER FIELDS ; POPULATION-III STARS ; LYMAN-BREAK GALAXIES ; DARK-MATTER HALOES ; LOW-MASS GALAXIES ; COSMIC REIONIZATION ; ULTRAVIOLET LUMINOSITY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000388122400065 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6848]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Scuola Normale Super Pisa, Piazza Cavalieri 7, I-56126 Pisa, Italy 2.Univ Tokyo, Todai Inst Adv Study, Kavli IPMU WPI, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan 3.Chinese Acad Sci, Key Lab Computat Astrophys, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yue, Bin,Ferrara, Andrea,Xu, Yidong. On the faint-end of the high-z galaxy luminosity function[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,463(2):1968-1979. |
| APA | Yue, Bin,Ferrara, Andrea,&Xu, Yidong.(2016).On the faint-end of the high-z galaxy luminosity function.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,463(2),1968-1979. |
| MLA | Yue, Bin,et al."On the faint-end of the high-z galaxy luminosity function".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 463.2(2016):1968-1979. |
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