Beamed Lyα emission through outflow-driven cavities
Beamed Lyα emission through outflow-driven cavities
复制标题
通过流出驱动腔进行光束 Lyα 发射
DOI:
10.1051/0004-6361/201322949
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发表时间:
--
影响因子:
6.5
通讯作者:
Niemeyer
中科院分区:
文献类型:
--
作者:
Behrens;Dijkstra;Niemeyer
We investigate the radiative transfer of Lyαphotons through simplified anisotropic gas distributions, which represent physically motivated extensions of the popular shell models. Our study is motivated by the notion that (i) shell models do not always reproduce observed Lyαspectral line profiles; (ii) (typical) shell models do not allow for the escape of ionizing photons; and (iii) the observation and expectation that winds are more complex, anisotropic phenomena. We examine the influence of inclination on the Lyαspectra, relative fluxes and escape fractions. We find the flux to be enhanced/suppressed by factors up to a few depending on the parameter range of the models, corresponding to a boost in equivalent width of the same amplitude if we neglect dust. In general, lower mean optical depths tend to reduce the impact of anisotropies as is expected. We find a correlation between an observed peak in the – occasionally triple-peaked – spectrum at the systemic velocity and the existence of a low optical depth cavity along the line of sight. This can be of importance in the search for ionizing photons leaking from high- redshift galaxies since these photons will also be able to escape through the cavity.
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影响因子:
6.5
作者:
E. Vanzella;A. Grazian;M. Hayes;L. Pentericci;D. Schaerer;D. Schaerer;M. Dickinson;S. Cristiani;M. Giavalisco;A. Verhamme;M. Nonino;P. Rosati
通讯作者:
P. Rosati
DOI:
10.1088/0004-637x/766/2/91
发表时间:
2013
期刊:
The Astrophysical Journal
影响因子:
--
作者:
A. Jaskot;M. Oey
通讯作者:
M. Oey
DOI:
10.1088/0004-637x/730/1/5
发表时间:
2011-01
期刊:
The Astrophysical Journal
影响因子:
--
作者:
T. Heckman;S. Borthakur;R. Overzier;G. Kauffmann;A. Basu-Zych;C. Leitherer;K. Sembach;D. Martin;R. Rich;D. Schiminovich;M. Seibert
通讯作者:
T. Heckman;S. Borthakur;R. Overzier;G. Kauffmann;A. Basu-Zych;C. Leitherer;K. Sembach;D. Martin;R. Rich;D. Schiminovich;M. Seibert
DOI:
10.1088/0004-637x/794/2/116
发表时间:
2013
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Zheng Zheng;J. Wallace
通讯作者:
J. Wallace
DOI:
10.1086/513191
发表时间:
2006
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
P. Laursen;J. Sommer
通讯作者:
J. Sommer