Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/36476
Title: X-RAY TRANSIENTS: HYPER- OR HYPO-LUMINOUS?
Authors: Lasota, J-P.
King, Andrew Robert
Dubus, G.
First Published: 24-Feb-2015
Publisher: IOP Publishing LTD
Citation: Astrophysical Journal Letters, 2015, 801 (1), pp. ?-? (4)
Abstract: The disk instability picture gives a plausible explanation for the behavior of soft X-ray transient systems if self-irradiation of the disk is included. We show that there is a simple relation between the peak luminosity (at the start of an outburst) and the decay timescale. We use this relation to place constraints on systems assumed to undergo disk instabilities. The observable X-ray populations of elliptical galaxies must largely consist of long-lived transients, as deduced on different grounds by Piro & Bildsten (2002). The strongly varying X-ray source HLX-1 in the galaxy ESO 243-49 can be modeled as disk instability of a highly super-Eddington stellar-mass binary similar to SS 433. A fit to the disk instability picture is not possible with an intermediate-mass black hole model for HLX-1. Other recently identified super-Eddington ULXs might be subject to disk instability.
DOI Link: 10.1088/2041-8205/801/1/L4
ISSN: 2041-8205
eISSN: 2041-8213
Links: http://iopscience.iop.org/article/10.1088/2041-8205/801/1/L4
http://hdl.handle.net/2381/36476
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2015. The American Astronomical Society. All rights reserved. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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