Is the plateau state in GRS 1915+105 equivalent to canonical hard states?
Van Oers P, Markoff S, Rahoui F, Maitra D, Nowak M, Wilms J, Castro-Tirado AJ, Rodriguez J, Dhawan V, Harlaftis E (2010)
Publication Status: Published
Publication Type: Journal article
Publication year: 2010
Journal
Publisher: WILEY-BLACKWELL
Book Volume: 409
Pages Range: 763-776
Journal Issue: 2
DOI: 10.1111/j.1365-2966.2010.17339.x
Abstract
GRS 1915+105 is a very peculiar black hole binary that exhibits accretion-related states that are not observed in any other stellar-mass black hole system. One of these states, however referred to as the plateau state - may be related to the canonical hard state of black hole X-ray binaries. Both the plateau and hard state are associated with steady, relatively lower X-ray emission and flat/inverted radio emission, that is sometimes resolved into compact, self-absorbed jets. However, while generally black hole binaries quench their jets when the luminosity becomes too high, GRS 1915+105 seems to sustain them despite the fact that it accretes at near- or super-Eddington rates. In order to investigate the relationship between the plateau and the hard state, we fit two multiwavelength observations using a steady-state outflow-dominated model, developed for hard-state black hole binaries. The data sets consist of quasi-simultaneous observations in radio, near- infrared and X-ray bands. Interestingly, we find both significant differences between the two plateau states, as well as between the best-fitting model parameters and those representative of the hard state. We discuss our interpretation of these results, and the possible implications for GRS 1915+105's relationship to canonical black hole candidates.
Authors with CRIS profile
Involved external institutions
Institute of Astrophysics of Andalusia / Instituto de Astrofísica de Andalucía (IAA-CSIC)
Spain (ES)
National Observatory of Athens (NOA)
Greece (GR)
National Radio Astronomy Observatory (NRAO)
United States (USA) (US)
University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot
France (FR)
Massachusetts Institute of Technology (MIT)
United States (USA) (US)
University of Amsterdam
Netherlands (NL)
Spain (ES)
National Observatory of Athens (NOA)
Greece (GR)
National Radio Astronomy Observatory (NRAO)
United States (USA) (US)
University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot
France (FR)
Massachusetts Institute of Technology (MIT)
United States (USA) (US)
University of Amsterdam
Netherlands (NL)
How to cite
APA:
Van Oers, P., Markoff, S., Rahoui, F., Maitra, D., Nowak, M., Wilms, J.,... Harlaftis, E. (2010). Is the plateau state in GRS 1915+105 equivalent to canonical hard states? Monthly Notices of the Royal Astronomical Society, 409(2), 763-776. https://doi.org/10.1111/j.1365-2966.2010.17339.x
MLA:
Van Oers, Pieter, et al. "Is the plateau state in GRS 1915+105 equivalent to canonical hard states?" Monthly Notices of the Royal Astronomical Society 409.2 (2010): 763-776.
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