Shahbaz, T., Dhillon, V.S. orcid.org/0000-0003-4236-9642, Marsh, T.R. et al. (5 more authors) (2005) ULTRACAM observations of the black hole X-ray transient XTE J1118+480 in quiescence. Monthly Notices of the Royal Astronomical Society, 362 (3). pp. 975-982. ISSN 0035-8711
Abstract
We present high time-resolution multicolour observations of the quiescent soft X-ray transient XTE J1118+480 obtained with ULTRACAM. Superimposed on the double-humped continuum g'- and i'-band light curves are rapid flare events which typically last a few minutes. The power density spectrum of the light curves can be described by a broken power-law model with a break frequency at ∼2 mHz or a power-law model plus a broad quasi-periodic oscillation at ∼2 mHz. In the context of the cellular automaton we estimate the size of the quiescent advection-dominated accretion flow (ADAF) region to be ∼104 Schwarzschild radii, similar to that observed in other quiescent black hole X-ray transients, suggesting the same underlying physics. The similarities between the low/hard and quiescent-state power density spectrum suggest a similar origin for the optical and X-ray variability, most likely from regions at or near the ADAF.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2005 RAS. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | accretion; accretion discs; binaries : close; stars : individual : XTE J1118+480 |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 11 Apr 2019 11:59 |
Last Modified: | 11 Apr 2019 11:59 |
Status: | Published |
Publisher: | Oxford University Press (OUP) |
Refereed: | Yes |
Identification Number: | 10.1111/j.1365-2966.2005.09361.x |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:144860 |