Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....90...26y&link_type=abstract
Astronomy and Astrophysics, vol. 90, no. 1-2, Oct. 1980, p. 26-33.
Astronomy and Astrophysics
Astrophysics
16
Neutron Stars, Pulsars, Radiative Transfer, Stellar Mass Accretion, X Ray Stars, Electron Energy, Light Curve, Magnetic Stars, Stellar Models
Scientific paper
Results of detailed radiative transport calculations of X-ray pulsars models have been compared to the spectra and light curves of Her X-1. Attempts to reconcile model calculations and observations lead to several conclusions: (1) the surface magnetic field of Her X-1 is approximately (5 + or - 1) x 10 to the 12th G; (2) the maximum electron temperature of about 10 keV occurs in the lowest, most dense parts of the accretion column. It is found to decrease with increasing height; (3) the bulk velocity in the emission zone is less than c/7; (4) radiation is emitted from the column in an asymmetric fan beam pattern. The average height of the beam center above the surface is a few hundred meters (500-1000 m); and (5) the observed 1.24-s pulsation is, mainly, due to this fan beaming mechanism although additional effects of obscuration by an opaque shell cannot be ruled out. It is further shown that under the presumed conditions in the column, the gross features of the observed Her X-1 spectrum can be well understood.
No associations
LandOfFree
Spectra and pulse formation mechanism in X-ray pulsars - Application to HER X-1 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 Spectra and pulse formation mechanism in X-ray pulsars - Application to HER X-1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectra and pulse formation mechanism in X-ray pulsars - Application to HER X-1 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-946773