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X-Ray Properties of High-Z Radio-Quiet Quasars: ASCA Observations

  • M. Cappi (a1) (a2), M. Matsuoka (a1), C. Vignali (a3), A. Comastri (a4), T. Mihara (a1), C. Otani (a1), G.G.C. Palumbo (a2) (a3) and S.J. Xue (a1)...

Abstract

The first-ever high energy (~ 1-30 keV) X-ray spectra of three z ~ 2 radio-quiet quasars (RQQs) are presented. If confirmed, the most interesting result is the marginal, but consistent, evidence for FeKα emission lines in at least two of the sources. Further ASCA observations of high-z RQQs are needed for firm conclusions.

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References

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Bechtold, J., et al., 1994, AJ, 108, 374
Cappi, M., 1998, , submitted
Cappi, M., et al., 1997, ApJ, 478, 492
Dickey, J.M. & Lockman, F.J., 1990, ARA&A, 28, 215
Fiore, F., et al., 1997, ApJ, in press (astroph/9708050)

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