Relativistic outflow in CXO CDFS J033260.0-274748
Abstract
In this letter we report the detection of a strong and extremely blueshifted X-ray absorption feature in the 1 Ms Chandra spectrum of CXO CDFS J033260.0-274748, a quasar at z = 2.579 with L_2-10keV ~ 4x10^44 ergs/s. The broad absorption feature at ~ 6.3 keV in the observed frame can be fitted either as an absorption edge at 20.9 keV or as a broad absorption line at 22.2 keV rest frame. The absorber has to be extremely ionized with an ionization parameter \xi ~ 10^4, and a high column density N_H >5x10^23 cm^-2. We reject the possibility of a statistical or instrumental artifact. The most likely interpretation is an extremely blueshifted broad absorption line or absorption edge, due to H or He--like iron in a relativistic jet-like outflow with bulk velocity of ~ 0.7-0.8 c. Similar relativistic outflows have been reported in the X-ray spectra of several other AGNs in the past few years.
Keywords
Cite
@article{arxiv.astro-ph/0508225,
title = {Relativistic outflow in CXO CDFS J033260.0-274748},
author = {J. X. Wang and T. G. Wang and P. Tozzi and R. Giacconi and G. Hasinger and L. Kewley and V. Mainieri and M. Nonino and C. Norman and A. Streblyanska and G. Szokoly and T. Yaqoob and A. Zirm},
journal= {arXiv preprint arXiv:astro-ph/0508225},
year = {2009}
}
Comments
ApJ letter accepted