Upper limits on the mass and luminosity of Population III-dominated galaxies
Upper limits on the mass and luminosity of Population III-dominated galaxies
复制标题
III族星系的质量和光度上限
DOI:
10.1093/mnrasl/slw249
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Sadegh Khochfar
中科院分区:
文献类型:
--
作者:
Hidenobu Yajima;Sadegh Khochfar
We here derive upper limits on the mass and luminosity of Population III (POPIII) dominated proto-galaxies based on the collapse of primordial gas under the effect of angular momentum loss via Lyα radiation drag and the gas accretion on to a galactic centre. Our model predicts that POPIII-dominated galaxies atz∼ 7 are hosted by haloes withMh∼ 1.5 × 108–1.1 × 109M⊙, that they have Lyα luminosities ofLLyα∼ 3.0 × 1042–2.1 × 1043erg s− 1, stellar mass ofMstar∼ 0.8 × 105–2.5 × 106M⊙and outflowing gas with velocitiesVout∼ 40 km s− 1due to Lyα radiation pressure. We show that the POPIII galaxy candidate CR7 violates the derived limits on stellar mass and Lyα luminosity and thus is unlikely to be a POPIII galaxy. POPIII-dominated galaxies atz∼ 7 have Heiiline emission that is ∼1–3 orders of magnitude lower than that of Lyα, they have high Lyα equivalent width of ≳ 300 Å and should be found close to bright star-forming galaxies. The Heii1640 Å line is in comfortable reach of next generation telescopes, like theJames Webb Space Telescope (JWST)or Thirty Meter Telescope (TMT).
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DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
H. Yajima;Yue;Qirong Zhu;Tom Abel
通讯作者:
Tom Abel
影响因子:
4.8
作者:
E. Visbal;Z. Haiman;G. Bryan
通讯作者:
G. Bryan
DOI:
10.1088/0004-637x/800/2/97
发表时间:
2015
期刊:
The Astrophysical Journal
影响因子:
--
作者:
M. Topping;J. Michael Shull
通讯作者:
J. Michael Shull
影响因子:
4.8
作者:
J. Wise;V. Demchenko;M. Halicek;M. Norman;M. Turk;Tom Abel;Britton D. Smith
通讯作者:
J. Wise;V. Demchenko;M. Halicek;M. Norman;M. Turk;Tom Abel;Britton D. Smith
影响因子:
56.9
作者:
N. Yoshida;K. Omukai;L. Hernquist
通讯作者:
N. Yoshida;K. Omukai;L. Hernquist