High Luminosity Jets: Can The GRS 1915+105 Plateau State Be Compared To The Canonical Hard State?

Details High Luminosity Jets: Can The GRS 1915+105 Plateau State Be Compared To The Canonical Hard State? High Luminosity Jets: Can The GRS 1915+105 Plateau State Be Compared To The Canonical Hard State?

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.4232v&link_type=abstract

American Astronomical Society, HEAD meeting #11, #42.32; Bulletin of the American Astronomical Society, Vol. 41, p.730

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Scientific paper

GRS 1915+105 is a very peculiar black hole binary, exhibiting 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 or χ 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. In order to investigate the relationship between the plateau and the hard state, we fit two multi-wavelength 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, infrared and X-ray bands. Interestingly, we find both significant differences between the two plateau states, as well as between the best-fit model parameters and those representative of the hard state. In particular we find that the plateau state jets must be not only extremely luminous, but also extremely magnetically dominated. We discuss our interpretation of these results, and the possible implications for GRS 1915+105's relationship to canonical black hole candidates.

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