Quasi-periodic variability and the inner radii of thin accretion disks in galactic black hole systems

Tiziana Di Matteo, Dimitrios Psaltis

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We calculate upper bounds on the inner radii of geometrically thin accretion disks in galactic black hole systems by relating their rapid variability properties to those of neutron stars. We infer that the inner disk radii do not exhibit large excursions between different spectral states, in contrast with the concept that the disk retreats significantly during the soft-to-hard-state transition. We find that, in the hard state, the accretion disks extend down to radii ≲6-25 GM/c2 and discuss the implications of our results for models of black hole X-ray spectra.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume526
Issue number2 PART 2
StatePublished - Dec 1 1999
Externally publishedYes

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accretion disks
accretion
radii
neutron stars
x rays

Keywords

  • Accretion, accretion disks
  • Black hole physics
  • X-rays: stars

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Quasi-periodic variability and the inner radii of thin accretion disks in galactic black hole systems. / Di Matteo, Tiziana; Psaltis, Dimitrios.

In: Astrophysical Journal, Vol. 526, No. 2 PART 2, 01.12.1999.

Research output: Contribution to journalArticle

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