An Extremely Red Nucleus in an Absorbed QSO at z=0.65
Abstract
The results of K-band-imaging observations of a candidate of an absorbed QSO at z=0.653, AX J131831+3341, are presented. The B-K color of the object is 4.85 mag, which is much redder than optically-selected QSOs. The K-band image shows nuclear and extended components, the same as in the optical V-, R-, and I-band images. The nuclear component (I-K = 4.29 mag) is much redder than the power-law models with energy indices of 0 to -1.0, which well reproduce the V-R and R-I optical colors of the nuclear component. A heavily absorbed (A_V = 3 mag) nucleus may emerge in the K-band, while optical light may originate from scattered nuclear light. The I-K color of the extended component is 2.2 mag, which is consistent with the post-starburst nature of the host galaxy, which is also suggested from the V-R and R-I colors of the extended component.
Cite
@article{arxiv.astro-ph/0012502,
title = {An Extremely Red Nucleus in an Absorbed QSO at z=0.65},
author = {Masayuki Akiyama and Kouji Ohta},
journal= {arXiv preprint arXiv:astro-ph/0012502},
year = {2015}
}
Comments
14 pages with 3 figures, accepted for publication for PASJ