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Čerenkov Line Radiation: An Important Line Mechanism in the Broad-Line Region1

Published online by Cambridge University Press:  12 April 2016

Jian-rong Shi ,
Hao Wu  and
Jun-han you
Jian-rong Shi
Affiliation:
Institute for Space and Astrophysics, Department of Applied Physics, Shanghai Jiaotong University, Shanghai 200030, China
Hao Wu
Affiliation:
Institute for Space and Astrophysics, Department of Applied Physics, Shanghai Jiaotong University, Shanghai 200030, China
Jun-han you
Affiliation:
Institute for Space and Astrophysics, Department of Applied Physics, Shanghai Jiaotong University, Shanghai 200030, China

Extract

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Observations (Espey et al. 1989, Carswell et al. 1991, Marziani et al. 1996) at high resolution have shown relative shifts between the Balmer lines and the C iv line in a number of QSOs. In this paper, we suggest that in the BLR there are many cloudlets with dense gas that is optically thick, and the BLR is not only illuminated by UV-X radiation, but also by relativistic electrons. Therefore the Čerenkov line radiation has to be taken into consideration, and we calculate the Čerenkov line redshifts and the profiles.

Type
IV. Physics of the Broad-Line Region
Information
International Astronomical Union Colloquium , Volume 159: Emission Lines in Active Galaxies: New Methods and Techniques , 1997 , pp. 228 - 229
Copyright
Copyright © Astronomical Society of the Pacific 1997

Footnotes

1

This work is supported by National Natural Science Foundation of China.

References

Carswell, R.F., et al. 1991, ApJ, 381, L5.CrossRefGoogle Scholar
Espey, B.R., et al. 1989, ApJ, 342, 666.Google Scholar
Manzini, P., et al. 1996, ApJS, 104, 37.Google Scholar
You, J.H., & Cheng, F.H. 1986, Phys. Rev. A, 34, 3015.Google Scholar