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IR Spectroscopy of High-Redshift Quasars

Published online by Cambridge University Press:  12 April 2016

Jill Bechtold
Affiliation:
Steward Observatory, University of Arizona, Tucson, AZ 85721, USA
Joseph Shields
Affiliation:
Steward Observatory, University of Arizona, Tucson, AZ 85721, USA
Marcia Rieke
Affiliation:
Steward Observatory, University of Arizona, Tucson, AZ 85721, USA
Peiwen Ji
Affiliation:
Steward Observatory, University of Arizona, Tucson, AZ 85721, USA
Jennifer Scott
Affiliation:
Steward Observatory, University of Arizona, Tucson, AZ 85721, USA
Olga Kuhn
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA
Martin Elvis
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA
Richard Elston
Affiliation:
Cerro Tololo Inter-American Observatory, La Serena, Chile

Abstract

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We have obtained near-IR, optical, and soft X-ray spectrophotometry for a number of bright quasars with 2 ≲ z ≲ 4. The observed ratios of Lyα/Hβ in this sample are smaller than Case B, and span a similar range to those seen at lower redshift. A correlation between the line width of Hβ and X-ray spectral index found for low-redshift PG quasars is also seen for the high-redshift objects.

Type
II. Broad Emission Lines
Copyright
Copyright © Astronomical Society of the Pacific 1997

References

Baldwin, J.A. 1977, MNRAS, 178, 67p.CrossRefGoogle Scholar
Bechtold, J., Elvis, M., Fiore, F., Kuhn, O., Cutri, R.M., McDowell, J.C., Rieke, M., Siemiginowska, A., Wilkes, B.J. 1994a, AJ, 108, 374.Google Scholar
Bechtold, J., Elvis, M., Fiore, F., Kuhn, O., Cutri, R.M., McDowell, J.C., Rieke, M., Siemiginowska, A., Wilkes, B.J. 1994b, AJ, 108, 759.Google Scholar
Bechtold, J., et al. 1996, in preparation.Google Scholar
Davidson, K., and Netzer, H. 1979, Rev. Mod. Phys., 51, 715.CrossRefGoogle Scholar
Elvis, M., Matsuoka, M., Siemiginowska, A., Fiore, F., Mihara, T., Brinkmann, W. 1994, ApJ, 436, L55.Google Scholar
Kuhn, O. 1996, Ph.D. thesis, Harvard University.Google Scholar
Kuhn, O., Bechtold, J., Cutri, R., Elvis, M., Rieke, M. 1995, ApJ, 438, 643.Google Scholar
Laor, A., Fiore, F., Elvis, M., Wilkes, B.J., McDowell, J.C. 1994, ApJ, 435, 611.Google Scholar
Laor, A., Fiore, F., Elvis, M., Wilkes, B.J., McDowell, J.C., 1996, preprint.Google Scholar
Netzer, H., Brotherton, M.S., Wills, B.J., Han, M., Wills, D., Baldwin, J.A., Ferland, G.J., Browne, I.W.A. 1995, ApJ, 448, 27.Google Scholar
Serlemitsos, P., Yaqoob, T., Ricker, G., Woo, J., Kunieda, H., Terashima, Y., Iwasawa, K. 1994, PASJ, 46, L43.Google Scholar
Wills, B.J., Thompson, K.L., Han, M., Netzer, H., Wills, D., Baldwin, J.A., Ferland, G.J., Browne, I.W.A., Brotherton, M.S. 1995, ApJ, 447, 139.Google Scholar