Infrared and millimeter observations of the galactic superluminal source GRS 1915+105.

Details Infrared and millimeter observations of the galactic superluminal source GRS 1915+105. Infrared and millimeter observations of the galactic superluminal source GRS 1915+105.

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc..129c&link_type=abstract

International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 129 - 130

Astronomy and Astrophysics

Astrophysics

1

X-Ray Transients: Black Holes, X-Ray Transients: Neutron Stars, X-Ray Transients: Superluminal Motions, X-Ray Transients: Mm Radiation, X-Ray Transients: Infrared Radiation, X-Ray Transients: Ejecta

Scientific paper

Millimeter observations of the galactic source of relativistic ejections GRS 1915+105 (Mirabel and Rodríguez 1994) are consistent with this source being at a kinematic distance 12.5±1.5kpc from the Sun, behind the core of a molecular cloud at 9.4±0.2 kpc. At this distance, GRS 1915+105, frequently radiating ≡3×1038erg s-1 in the X-rays, becomes the most luminous X-ray source in the Galaxy. The total hydrogen column density N(H) = 4.7±0.2×1022cm-2 along the line of sight corresponds to a visual absorption Av = 26.5±1 mag. The infrared counterpart of GRS 1915+105 exhibits in the 1.2-2.2 μm band variations of ≡1 mag in a few hours and ≡2 mag over longer intervals of time. In the infrared, GRS 1915+105 is strikingly similar to SS433, and unlike any other known stellar source in the Galaxy. The infrared resemblance in absolute magnitude, color, and time variability, between these two sources of relativistic ejections suggests that GRS 1915+105, like SS433, consists of a collapsed object (neutron star or black hole) with a thick accretion disk in a high-mass-luminous binary system.

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