“Canonical” Black Hole States in the Superluminal Source GRO J1655−40 | Zendy

Mariano Méndez | Zendy; T. Belloni | Zendy; M. van der Klis | Zendy

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“Canonical” Black Hole States in the Superluminal Source GRO J1655−40

Author(s) -

Mariano Méndez,

T. Belloni,

M. van der Klis

Publication year - 1998

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/311368

Subject(s) - superluminal motion , physics , black hole (networking) , astrophysics , intermediate mass black hole , astronomy , spin flip , accretion (finance) , computer network , routing protocol , routing (electronic design automation) , computer science , link state routing protocol

We analyze RXTE/PCA observations of the black hole candidate and galacticsuperluminal source GRO J1655-40 during its recent outburst. We show thatduring its decay to quiescence, GRO J1655-40 goes through the high,intermediate, and low state (and that at the beginning of its decay it mighthave even shown signatures of a very high state), just like other black holecandidates. This is the first time that such a transition is observed in agalactic superluminal source. We discuss what are the implications of theseresults on the hypothesis that the spin of the black hole in superluminalsources is much higher than in other black hole candidates.Comment: To appear in ApJL. AAS LaTex v4.0 (9 pages, 2 ps-figures

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