Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..238..123y&link_type=abstract
Black Holes from Stars to Galaxies -- Across the Range of Masses. Edited by V. Karas and G. Matt. Proceedings of IAU Symposium #
Astronomy and Astrophysics
Astronomy
Scientific paper
The Seyfert 1.9 galaxy NGC 2992 has been observed by all X-ray astronomy missions since HEAO-1 for over a quarter of a century, including a one-year RXTE monitoring campaign in 2005/2006 and three Suzaku observations in 2005. The source exhibited over a factor of 20 variability in the hard X-ray luminosity over the ˜25 year period and over an order-of-magnitude variability in the luminosity during the RXTE monitoring period. The luminosity changes are accompanied by spectral variability. In particular there is complex variability in the Fe K emission-line profile which consists of an accretion-disk component and a distant-matter component. The relativistic disk line component shows variability that likely corresponds to changes in the spatial illumination of the disk and the Suzaku data are able to decouple the disk line component from the distant-matter component. In one of the historical BeppoSAX observations an emission-line component from highly ionized Fe was also apparent. In this contribution we illustrate how the unique X-ray properties of NGC 2992 make it one of best supermassive black-hole candidates for testing accretion disk theories since any model must be able to satisfy all of the short and long timescale observational constraints. Future observations need to be planned to exploit the rich behavior to provide even more stringent constraints. NGC 2992 is also a good candidate for constraining AGN unification models.
Murphy Kendrah D.
Terashima Yuichi
Yaqoob Tahir
No associations
LandOfFree
An accretion disk laboratory in the Seyfert 1.9 galaxy NGC 2992 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with An accretion disk laboratory in the Seyfert 1.9 galaxy NGC 2992, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An accretion disk laboratory in the Seyfert 1.9 galaxy NGC 2992 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1082609