Finding Goodies in the COSMOS survey

Details Finding Goodies in the COSMOS survey Finding Goodies in the COSMOS survey

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cfdd.confe..78c&link_type=abstract

Chandra's First Decade of Discovery, Proceedings of the conference held 22-25 September, 2009 in Boston, MA. Edited by Scott Wo

Physics

Agn Evolution

Scientific paper

We present the discovery in the Chandra COSMOS survey of the only clear double nucleus detected at substantial redshift (z=0.359) and the only one (out of ˜2600 X-ray sources) to have an unprecedented broad redshifted absorption and emission iron lines, drawing a kind of inverted P-Cygni profile in its X-ray spectrum. That these two unique features occur in the same source is unlikely to be a co-incidence. The two nuclei, 2.5 kpc apart, are likely to be a Type 1 and a Type 2 AGN from X-ray (Chandra and XMM-Newton) and optical(HST/ACS and VLT/Vimos) imaging and spectroscopic analysis. The broadening of the redshifted absorption iron line is the result of the superimposition of narrow lines redshifted by different velocities in 5 years of XMM and Chandra observations. This z=0.359 merger may broadening our view on the AGN-mergers connection. An intriguing explanation of the system, a ``Backlit wind'', is that we are looking through a BAL-like outflow from the nearer nucleus (the type 2) at the rear nucleus(the Type 1), giving us a truly ``new angle'' on AGN outflows and so on ``feedback''.

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