期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 413, 期 1, 页码 L86-L90出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1745-3933.2011.01039.x
关键词
galaxies: active; galaxies: high-redshift; galaxies: individual: MG J0414+0534; galaxies: ISM; quasars: absorption lines; radio lines: galaxies
资金
- National Aeronautics and Space Administration (NASA)
- Associated Universities, Inc.
We report the detection of the third H I 21-cm absorber in the sight-line towards the z = 2.64 quasar MG J0414+0534 (4C+05.19). In addition to the absorption at the host redshift and in the z = 0.96 gravitational lens, we find, through a decimetre-wave spectral scan towards this source, strong absorption at z = 0.38. We believe this may be associated with 'Object X', an additional feature apparent in the field of the lensing galaxy and lensed images, on the basis of its close proximity to the quasar images and the possible detection of the [O III] doublet in a published optical spectrum. If real, the strength of the [O III] emission would suggest the presence of an active galactic nucleus, or a gas-rich galaxy undergoing rapid star formation, either of which is consistent with the strong outflows apparent in the 21-cm spectrum. Although this is the strongest intervening 21-cm absorber found to date (a column density of N-H I greater than or similar to 10(22) cm(-2), for a modest T-s/f greater than or similar to 300 K), simultaneous observations failed to detect any of the 18-cm OH lines at the 21-cm redshift. This suggests that, as for the lensing galaxy, this is not the primary location of the intervening material responsible for the very red colour of MG J0414+0534.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据