SIMBAD references

2001ApJ...563..301K - Astrophys. J., 563, 301-312 (2001/December-2)

Long-term multiwavelength observations of GRS 1758-258 and the advection-dominated accretion flow model.

KECK J.W., CRAIG W.W., HAILEY C.J., HARRISON F., HONG J.S., KAHN S.M., LUBIN P.M., McLEAN R., PIVOVAROFF M.J., SEIFFERT M., WURTZ R. and ZIOCK K.P.

Abstract (from CDS):

We present a long-term multiwavelength light curve of Galactic black hole candidate GRS 1758-258 by combining previously published and archival data from Granat, ROSAT, the Compton Gamma Ray Observatory, the Rossi X-Ray Timing Explorer, BeppoSAX, ASCA, EXOSAT, and the Very Large Array. In addition, we include the first spectral results from the balloon-borne Gamma-Ray Arcminute Telescope Imaging System (GRATIS). In light of divergent analyses of the 1991-1993 ROSAT observations, we have reanalyzed these data; we find that the soft X-rays track the hard X-rays and that the fits require no blackbody component–indicating that GRS 1758-258 did not go to the high state in 1993. We offer an interpretation of these long-baseline data based on the advection-dominated accretion flow (ADAF) model for a system with m{dot}≲m{dot}crit. We find that the 1990-1993 coeval hard and soft X-ray observations support the ADAF predictions. We discuss a new way to constrain black hole mass with spectral data and the ADAF theory and apply this technique to GRS 1758-258 to find M1≳8-9 M at an assumed distance of 8.5 kpc. Further investigations of the ADAF model allow us to evaluate the model critically against the 1996 data and flux-flux diagram of Barret, McClintock, & Grindlay and to understand the limits of the latter's ``X-ray burster box.''

Abstract Copyright:

Journal keyword(s): Accretion, Accretion Disks - Black Hole Physics - Gamma Rays: Observations - Radio Continuum: Stars - Stars: Individual: Alphanumeric: GRS 1758-258 - X-Rays: Stars

Simbad objects: 14

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2020.09.18-10:58:42

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