Hyper- and Suspended-Accretion States of Rotating Black Holes and the Durations of Gamma-Ray Bursts | Zendy

Maurice H. P. M. van Putten | Zendy; Eve C. Ostriker | Zendy

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Hyper- and Suspended-Accretion States of Rotating Black Holes and the Durations of Gamma-Ray Bursts

Author(s) -

Maurice H. P. M. van Putten,

Eve C. Ostriker

Publication year - 2001

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 - 10.1086/320253

Subject(s) - physics , astrophysics , accretion (finance) , afterglow , black hole (networking) , kinetic energy , accretion disc , inflow , gamma ray burst , spinning , rotational energy , torque , mechanics , atomic physics , classical mechanics , thermodynamics , mechanical engineering , computer network , routing protocol , routing (electronic design automation) , computer science , engineering , link state routing protocol

We analyze the temporal evolution of accretion onto rotating black holessubject to large-scale magnetic torques. Wind torques alone drive a disktowards collapse in a finite time $\sim t_{ff} E_k/E_B$, where $t_{ff}$ is theinitial free-fall time and $E_k/E_B$ is the ratio of kinetic-to-poloidalmagnetic energy. Additional spin-up torques from a rapidly rotating black holecan arrest the disk's inflow. We associate short/long gamma-ray bursts withhyperaccretion/suspended-accretion onto slowly/rapidly spinning black holes.This model predicts afterglow emission from short bursts, and may be tested byHETE-II.Comment: accepted for publication in the ApJ

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