Topics in Accretion Disk Instabilities: I. Magnetized Disks in Intermediate Polars and GK Per, and, II. Irradiated Disks in Black Hole X-Ray Novae.

Details Topics in Accretion Disk Instabilities: I. Magnetized Disks in Intermediate Polars and GK Per, and, II. Irradiated Disks in Black Hole X-Ray Novae. Topics in Accretion Disk Instabilities: I. Magnetized Disks in Intermediate Polars and GK Per, and, II. Irradiated Disks in Black Hole X-Ray Novae.

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phdt........13k&link_type=abstract

Thesis (PH.D.)--THE UNIVERSITY OF TEXAS AT AUSTIN, 1995.Source: Dissertation Abstracts International, Volume: 56-06, Section: B,

Other

Scientific paper

The accretion disk thermal instability theory was first proposed to explain outbursts in dwarf novae and successfully accounts for many observations. Dwarf nova-like outbursts have been observed in other low mass X-ray binaries and protostars. I have investigated the relevance of the disk instability theory to outburst phenomena in astrophysical objects other than dwarf novae: the intermediate polars and black hole X-ray novae. The disk instability model suggests that, in GK Per, the largest and brightest member of the intermediate polars, outbursts can be explained with a large inner disk radius (~30 -40 white dwarf radii) truncated by a strong magnetic field (_sp{~}>10 ^7 G). This model explains the precursor UV peak prior to maximum and the precursor plateau in some dwarf novae (e.g., BV Cen). The model disk spectrum is consistent with the observed UV and optical spectra, especially in the maximum and early phases of the outbursts. A study of the accretion column, together with the disk instability model, suggests that the Compton effect could play an important role and a soft X-ray excess is expected as observed. The disk instability model also suggests that GK Per has a relatively high mass transfer rate ~10 18 gs^ {-1}. The disk instability model can naturally produce the ultra-soft X-rays (_sp {~}

Affiliated with

Also associated with

No associations

Rating

Topics in Accretion Disk Instabilities: I. Magnetized Disks in Intermediate Polars and GK Per, and, II. Irradiated Disks in Black Hole X-Ray Novae. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Topics in Accretion Disk Instabilities: I. Magnetized Disks in Intermediate Polars and GK Per, and, II. Irradiated Disks in Black Hole X-Ray Novae., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Topics in Accretion Disk Instabilities: I. Magnetized Disks in Intermediate Polars and GK Per, and, II. Irradiated Disks in Black Hole X-Ray Novae. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-837437