Structure of the inner regions of the circumstellar gas envelopes of young hot stars. I. The isolated Ae Herbig star WW Vul |
| |
Authors: | O V Kozlova D N Shakhovskoi A N Rostopchina I Yu Alekseev |
| |
Institution: | (1) Crimean Astrophysical Observatory, Ukraine |
| |
Abstract: | Results of simultaneous spectral and photometric monitoring of the Ae Herbig star WW Vul in the neighborhoods of the Ha line
and the sodium NaI D resonance doublet are reported. It is shown that the spectral variability of the star is caused mainly
by the anisotropic disk wind, whose high velocity component forms in the inner region of the accretion disk. The circumstellar
gas in footpoint of the wind shows the variability of the density and velocity, that is in good agreement with the results
of modeling of an accretion and outflows around young stars controlled by the stellar and/or disk magnetic field. An analysis
of the variability of the parameters of the Ha emission line also showed that the density of the gas in the inner region of
the accretion disk varies over a time scale exceeding 10 years.
__________
Translated from Astrofizika, Vol. 49, No. 2, pp. 171–185 (May 2006). |
| |
Keywords: | stars circumstellar matter-individual c]WW Vul |
本文献已被 SpringerLink 等数据库收录! |