A Chandra Observation of the Luminous NLS1 1H 0707-495
Karen M. Leighly, Andrzej A. Zdziarski, Toshihiro Kawaguchi, Chiho Matsumoto
Abstract
We present preliminary results from a long Chandra HETG observation of the luminous Narrow-line Seyfert 1 galaxy 1H 0707-495. We find a complex X-ray spectrum comprised of a two-component continuum with superimposed emission and absorption lines. The short time scale X-ray variability is different than observed in other AGN: the soft X-rays vary markedly less than the hard X-rays. This behavior is similar to that of high-state Galactic black holes. We also investigated the long time scale variability, and discovered an apparent bimodal flux distribution. We postulate that the bimodality is the signature of the radiation pressure instability, and note that this instability may be expected in luminous NLS1s.
Create a lesson
Related papers
On binary pulsars and the force of gravity
Davor Palle
Tidal torques. A critical review of some techniques
Michael Efroimsky, James G. Williams
Dynamics of a Spherical Accretion Shock with Neutrino Heating and Alpha-Particle Recombination
Rodrigo Fernández, Christopher Thompson
Asymptotically FRW black holes
J. T. Firouzjaee, Reza Mansouri
Reaction of Accretion Disks to Abrupt Mass Loss During Binary Black Hole Merger
Sean M. O'Neill, M. Coleman Miller, Tamara Bogdanovic et al.
A Gamma-Ray Burst/Pulsar for Cosmic-Ray Positrons with a Dark Matter-like Spectrum
Kunihito Ioka