Non-LTE models of the accretion disks of UX Ori stars

Details Non-LTE models of the accretion disks of UX Ori stars Non-LTE models of the accretion disks of UX Ori stars

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ap.....42...54t&link_type=abstract

Astrophysics, Volume 42, Issue 1, pp.54-63

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

The results of a non-LTE analysis of a number of spectral lines formed in the accreting envelopes of UX Ori stars are given. The accretion rate is estimated from an analysis of the first three lines of the Balmer series: M a = 10-8 -10-9 M &sun; The gas temperature in this region is about 10,000 K. In the immediate vicinity of the star there is a hotter region, with T > 15,000 K, in which the 5876 Å line of neutral helium, observed in the spectra of these stars, is formed. The region of formation of this line has a small geometrical thickness, covers a small fraction of the star’s visible disk, and evidently consists of the site of contact of the accreting gas with the stellar surface. The low gas rotation rates in this region (150 200 km/sec) may mean that rapid rotation of the accreting gas is damped by the star’s magnetic field, which is strong enough to affect the gas stream. We estimate the magnetic field strength in this region to be about 150 G.

Affiliated with

Also associated with

No associations

Rating

Non-LTE models of the accretion disks of UX Ori stars 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 Non-LTE models of the accretion disks of UX Ori stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-LTE models of the accretion disks of UX Ori stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1189723