Physical and kinematical properties of the X-ray absorber in the broad absorption line quasar APM 08279+5255
arXiv:0807.2372 · doi:10.1051/0004-6361:200810264
Abstract
We have re-analyzed the X-ray spectra of the gravitational lensed high-redshift BAL QSO APM 08279+5255, observed with the XMM-Newton and Chandra observatories. Previous studies (Hasinger et al. 2002; Chartas et al. 2002) detected unusual, highly-ionized iron absorption features, but differed in their interpretation of these features, regarding the kinematical and ionization structure. We seek one physical model that can be successfully applied to both observations. For the first time we have performed detailed photoionization modeling on the X-ray spectrum of APM 08279+5255. The absorbing gas in APM 08279+5255 can be represented by a two-absorbers model with column densities N_H(1)~7x10^{22} cm^-2, N_H(2)~6x10^{22} cm^-2, and ionization parameters logxi(1)~1.5 and logxi(2)~3, with one of them (the high-ionization component) outflowing at v~0.18(\pm 0.01)c, carrying large amount of gas out of the system. We find that the Chandra spectrum of APM 08279+5255 requires the same Fe/O ratio overabundance (previously) indicated by the XMM-Newton observation, showing that both absorber components underwent similar chemical evolution and/or have similar origin.
12 pages, 7 figures, accepted by A&A at the 13th of June, 2008
References in corpus (4)
- An Exploratory Chandra Survey of a Well-Defined Sample of 35 Large Bright Quasar Survey Broad Absorption Line Quasars
- Confirming the high velocity outflow in PG 1211+143
- Simultaneous Ultraviolet and X-ray Observations of the Seyfert Galaxy NGC 4151. II. Physical Conditions in the UV Absorbers
- A Photoionization Model For The Soft X-Ray Spectrum Of NGC 4151