Fluorescent rings in star-free dark matter haloes
Fluorescent rings in star-free dark matter haloes
复制标题
无恒星暗物质晕中的荧光环
DOI:
10.1093/mnras/stz1234
复制
发表时间:
2019
影响因子:
4.8
通讯作者:
Sykes C
中科院分区:
文献类型:
--
作者:
Sykes C
Photoheating of the gas in low-mass dark matter (DM) haloes prevents baryons from cooling, leaving the haloes free of stars. Gas in these ‘dark’ haloes remains exposed to the ultraviolet background (UVB), and so is expected to emit via fluorescent recombination lines. We present a set of radiative transfer simulations, which model dark haloes as spherical gas clouds in hydrostatic equilibrium with a DM halo potential, and in thermal equilibrium with the UVB at redshiftz= 0. We use these simulations to predict surface brightnesses in ${\mathchoice{{\text{H}}\, {\alpha }}{{\text{H}}\, {\alpha }}{{\text{H}}{\alpha }}{{\text{H}}{\alpha }}}$, which we show to have a characteristic ring-shaped morphology for haloes in a narrow mass range between ≃109.5and. We explore how this emission depends on physical parameters such as the DM density profile and the UVB spectrum. We predict the abundance of fluorescent haloes on the sky, and discuss possible strategies for their detection. We demonstrate how detailed observations of fluorescent rings can be used to infer the properties of the haloes which host them, such as their density profiles and the mass–concentration relation, as well as to directly measure the UVB amplitude.
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DOI:
10.1086/177707
发表时间:
1996
期刊:
The Astrophysical Journal
影响因子:
--
作者:
A. Gould;D. Weinberg
通讯作者:
D. Weinberg
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
R. Cooke;M. Pettini;U. California;Santa Cruz;I. O. Astronomy;U. Cambridge
通讯作者:
U. Cambridge
影响因子:
4.8
作者:
N. Crighton;J. Hennawi;R. Simcoe;K. Cooksey;M. Murphy;Michele Fumagalli;Michele Fumagalli;J. Prochaska;T. Shanks
通讯作者:
T. Shanks
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
A. Gould;D. Weinberg
通讯作者:
D. Weinberg
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
Alejandro Ben'itez;J. Navarro;C. Frenk;Till Sawala;K. Oman;Azadeh Fattahi;M. Schaller;J. Schaye;R. Crain;T. Theuns
通讯作者:
T. Theuns