The unimportance of line blocking in the spectra of accretion disks

Details The unimportance of line blocking in the spectra of accretion disks The unimportance of line blocking in the spectra of accretion disks

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....77..354w&link_type=abstract

Astronomy and Astrophysics, vol. 77, no. 3, Aug. 1979, p. 354-356. Research supported by the Ministere de l'Education du Quebec

Astronomy and Astrophysics

Astrophysics

2

H Lines, Stellar Models, Ubv Spectra, Variable Stars, Broadband, Colorimetry, Rotating Disks

Scientific paper

The importance of the influence of hydrogen line blocking on the broad-band (UBV) colors of theoretical viscous accretion disk models is studied. Inclusion of the blocking effect due to the Balmer lines of hydrogen leads to (B-V) colors redder by less than 0.02 mag. This is insufficient to explain the discrepancy (approximately 0.2 mag in B-V), originally pointed out by Schwarzenberg-Czerny and Rozyczka, between the theoretical colors of stationary alpha-model disks and the observed UBV colors of cataclysmic variables. An improved physical discription of the other sources of light in these systems and the inclusion of some of these additional contributions into the calculations of the theoretical UBV colors appear needed to reach a better agreement between theoretical and observed colors.

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