The 590 Day Long-Term Periodicity of the Microquasar GRS 1915+105
Autor: | Jochen Greiner, M. L. McCollough, Arne Rau |
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Rok vydání: | 2003 |
Předmět: | |
Zdroj: | The Astrophysical Journal. 590:L37-L40 |
ISSN: | 1538-4357 0004-637X |
DOI: | 10.1086/376683 |
Popis: | 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. Comment: 6 pages, 4 figuers, accepted for publication as ApJ Letter |
Databáze: | OpenAIRE |
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