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Relativistic outflow in CXO CDFS J033260.0-274748

J. X. Wang·T. G. Wang·P. Tozzi·R. Giacconi·G. Hasinger·L. Kewley·V. Mainieri·M. Nonino·C. Norman·A. Streblyanska·G. Szokoly·T. Yaqoob·A. Zirm
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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 ξ~ 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.

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J. X. Wang, T. G. Wang, P. Tozzi, R. Giacconi, G. Hasinger, L. Kewley, V. Mainieri, M. Nonino, C. Norman, A. Streblyanska, G. Szokoly, T. Yaqoob, A. Zirm. 2005-08-10. Relativistic outflow in CXO CDFS J033260.0-274748. https://doi.org/10.1086/496970

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