The 590 days long term periodicity of the microquasar GRS 1915+105

Details The 590 days long term periodicity of the microquasar GRS 1915+105 The 590 days long term periodicity of the microquasar GRS 1915+105

2003-05-07

arxiv.org/abs/astro-ph/0305106v1

Astrophys.J. 590 (2003) L37-L40

Astronomy and Astrophysics

Astrophysics

6 pages, 4 figuers, accepted for publication as ApJ Letter

Scientific paper

10.1086/376683

We report on the discovery of a 590 days long term periodicity in the hard X-ray component of the microquasar \grs found from a comprehensive study of more than four years of {\it RXTE} observations. The periodicity is also observed in the hard X-ray flux observed by BATSE, and in the radio flux as seen with the {\it Green Bank Interferometer} and the {\it Ryle Telescope}. We discuss various possible explanations, including the precession of a radiation induced warped accretion disk.

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