Emission from the circumgalactic medium: from cosmological zoom-in simulations to multiwavelength observables
Emission from the circumgalactic medium: from cosmological zoom-in simulations to multiwavelength observables
复制标题
环绕银河系介质的发射:从宇宙学放大模拟到多波长可观测值
DOI:
10.1093/mnras/stz2238
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发表时间:
2019
影响因子:
4.8
通讯作者:
Augustin R
中科院分区:
文献类型:
--
作者:
Augustin R
We simulate the flux emitted from galaxy haloes in order to quantify the brightness of the circumgalactic medium (CGM). We use dedicated zoom-in cosmological simulations with the hydrodynamical adaptive mesh refinement coderamses, which are evolved down toz= 0 and reach a maximum spatial resolution of 380h−1pc and a gas mass resolution up toin the densest regions. We compute the expected emission from the gas in the CGM usingcloudyemissivity models for different lines (e.g. Lyα, Civ, Ovi, Cvi, Oviii) considering UV background fluorescence, gravitational cooling and continuum emission. In the case of Lyα, we additionally consider the scattering of continuum photons. We compare our predictions to current observations and find them to be in good agreement at any redshift after adjusting the Lyα escape fraction. We combine our mock observations with instrument models for Faint Intergalactic Redshifted Emission Balloon-2 (FIREBall-2; UV balloon spectrograph) and HARMONI (visible and NIR IFU on the ELT) to predict CGM observations with either instrument and optimize target selections and observing strategies. Our results show that Lyα emission from the CGM at a redshift of 0.7 will be observable with FIREBall-2 for bright galaxies (NUV∼18 mag), while metal lines like Oviand Civwill remain challenging to detect. HARMONI is found to be well suited to study the CGM at different redshifts with various tracers.
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DOI:
10.1086/309900
发表时间:
1995-09
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
N. Katz;D. Weinberg;L. Hernquist;J. Miralda-Escudé
通讯作者:
N. Katz;D. Weinberg;L. Hernquist;J. Miralda-Escudé
影响因子:
4.8
作者:
J. Krogager;P. Møller;J. Fynbo;P. Noterdaeme
通讯作者:
J. Krogager;P. Møller;J. Fynbo;P. Noterdaeme
影响因子:
4.8
作者:
Marta B. Silva;R. Kooistra;S. Zaroubi
通讯作者:
S. Zaroubi
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
A. Fox;R. Davé
通讯作者:
R. Davé
DOI:
10.1088/0004-637x/809/2/163
发表时间:
2015-04
期刊:
The Astrophysical Journal
影响因子:
--
作者:
F. A. Battaia;J. Hennawi;J. Prochaska;S. C. M. F. Astronomie;UCOLick Observatory;U. Cruz;Eth
通讯作者:
F. A. Battaia;J. Hennawi;J. Prochaska;S. C. M. F. Astronomie;UCOLick Observatory;U. Cruz;Eth