HEAD Division Meeting 1999, April 1999
Session 2. AGN
Poster, Monday, April 12, 1999, 8:30am-6:10pm, Gold Room

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[2.12] Doppler-shifted X-ray Emission Lines in High Redshift Quasars

T. Yaqoob, S. Zobair, I. M. George, T. J. Turner, K. Nandra, P. J. Serlemitsos (LHEA, NASA/GSFC)

X-ray emission lines in high luminosity quasars are uncommon. We report the discovery of unusual emission lines in the X-ray spectra of the high-redshift quasars PKS 0637-752 and PKS 2149-306 (at 1.6 keV and 17 keV in the quasar frame respectively). The lines do not have any immediate identification but if they are due to OVIII in PKS 0637-752 and Fe-K in PKS 2149 then the Doppler factors for both quasars are similar, implying relativistic bulk motion of the order of 0.75c.


If the author provided an email address or URL for general inquiries, it is as follows:

yaqoob@lheavx.gsfc.nasa.gov


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