Abstract
view Abstract Citations (73) References (22) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS On Nonsteady Accretion in Stellar Wind--fed X-Ray Sources Taam, Ronald E. ; Fryxell, B. A. Abstract The authors report on the results of hydrodynamical simulations of nonaxisymmetric gas flow past a finite-sized gravitating object. The asymmetry in the flow is assumed to be due to a transverse density gradient. The solutions are found to be highly time-dependent and exhibit phases in which a disk forms. The direction of circulation of the disk alternates between the direct and counter sense on time scales of approximately 1 hr. While the disk is present, the specific angular momentum is high, and the mass accretion rate, low. The angular momentum capture oscillates about a mean which secularly increases. Such temporal behavior may be relevant to those X-ray pulsing systems (e.g., Vela X-1) which exhibit fluctuations in the X-ray luminosity and pulse period on time scales much shorter than the orbital period of the binary system. Publication: The Astrophysical Journal Pub Date: April 1988 DOI: 10.1086/185143 Bibcode: 1988ApJ...327L..73T Keywords: Accretion Disks; Neutron Stars; Stellar Winds; Supersonic Flow; X Ray Binaries; X Ray Sources; Angular Momentum; Boundary Value Problems; Computational Astrophysics; Density Distribution; Astrophysics; STARS: ACCRETION; STARS: WINDS; X-RAYS: SOURCES full text sources ADS | data products SIMBAD (1)
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