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The Optical Spectral Slope Variability for 17 Palomar-Green QSOs

Published online by Cambridge University Press:  01 August 2006

X. Pu ,
W. Bian  and
K. Huang
X. Pu
Affiliation:
Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210097, China email: [email protected]
W. Bian
Affiliation:
Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210097, China email: [email protected]
K. Huang
Affiliation:
Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210097, China email: [email protected]
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Variability phenomenon in active galactic nuclei (AGNs) provides a powerful constrain on their central engine. For a long time the long-term multi-wavelength photometric monitoring plays an important role in obtaining the optical variability of QSOs. However, it just monitors the flux variability in a few points in the wavelength which usually consists of many components including continuum and strong emission line (although the photometric data are accurate). So it is necessary to study the optical spectral variability using spectroscopic monitoring data.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 78
Copyright
Copyright © International Astronomical Union 2007

References

Pu, X., Bian, W., & Huang, K. 2006, MNRAS, in press.Google Scholar
Kaspi, S., Smith, P. S., Netzer, H. 2000, ApJ 533, 631.CrossRefGoogle Scholar