Show simple item record

dc.contributor.authorDinçer, T.
dc.contributor.authorBailyn, C.
dc.contributor.authorMiller-Jones, James
dc.contributor.authorBuxton, M.
dc.contributor.authorMacdonald, R.
dc.date.accessioned2018-01-30T08:04:09Z
dc.date.available2018-01-30T08:04:09Z
dc.date.created2018-01-30T05:59:07Z
dc.date.issued2018
dc.identifier.citationDinçer, T. and Bailyn, C. and Miller-Jones, J. and Buxton, M. and Macdonald, R. 2018. Multiwavength Observations of the Black Hole X-Ray Binary A0620-00 in Quiescence. Astrophysical Journal. 852 (1): Article ID 4.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/61220
dc.identifier.doi10.3847/1538-4357/aa9a46
dc.description.abstract

We present results from simultaneous multiwavelength X-ray, radio, and optical/near-infrared observations of the quiescent black hole X-ray binary A0620-00 performed in 2013 December. We find that the Chandra flux has brightened by a factor of 2 since 2005, and by a factor of 7 since 2000. The spectrum has not changed significantly over this time, being consistent with a power law G = 2.07 ± 0.13 of and a hydrogen column of N H (3.0 ± 0.5) × 10 21 cm -2 . Very Large Array observations of A0620-00 at three frequencies, over the interval of 5.25-22.0 GHz, have provided us with the first broadband radio spectrum of a quiescent stellar mass black hole system at X-ray luminosities as low as 10 -8 times the Eddington luminosity. Compared to previous observations, the source has moved to lower radio and higher X-ray luminosity, shifting it perpendicular to the standard track of the radio/X-ray correlation for X-ray binaries. The radio spectrum is inverted with a spectral index a = 0.74 ± 0.19 (S v ? v a ). This suggests that the peak of the spectral energy distribution is likely to be between 10 12 and 10 14 Hz, and that the near-IR and optical flux contain significant contributions from the star, the accretion flow, and from the outflow. Decomposing these components may be difficult, but holds the promise of revealing the interplay between accretion and jet in low luminosity systems.

dc.publisherInstitute of Physics Publishing
dc.titleMultiwavength Observations of the Black Hole X-Ray Binary A0620-00 in Quiescence
dc.typeJournal Article
dcterms.source.volume852
dcterms.source.number1
dcterms.source.issn0004-637X
dcterms.source.titleAstrophysical Journal
curtin.note

Copyright © 2017 The American Astronomical Society. All rights reserved.

curtin.departmentCurtin Institute of Radio Astronomy (Physics)
curtin.accessStatusOpen access


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record