Spectral observations of the novalike star TT Ari. II |
| |
Authors: | N D Melikian V S Tamazian J A Docobo A A Karapetian G R Kostandian R Iglesias |
| |
Institution: | (1) V. A. Ambartsumian Byurakan Astrophysical Observatory, Byurakan, Armenia;(2) Ramon Maria Aller Astronomical Observatory, University of Santiago de Compostela, Santiago de Compostela, Spain;(3) Astronomy Department, University of La Laguna, Tenerife, Spain |
| |
Abstract: | Results from a spectral study of one of the brightest cataclysmic variables, the star TT Ari, are presented. They are generally
in good agreement with previous observations, but there are some differences. The luminosity of the star, as well as the equivalent
widths of emission lines, reveal variations that are probably periodic in character. Emission from the star in the CIV 5801Å
and 5812 Å lines is observed for the first time. The observed variations in the symmetry of the broad absorption Balmer series
(beginning with Hβ) may be a consequence of the appearance of a P Cyg line profile. The Hα line manifests a P Cyg profile
consisting of two components corresponding to 600 and 1900 km/s. The average of the ratio EWHα/EWHβ indicates that the formation
of these lines may be explained, at least partially, in terms of a simple photoionization-recombination model.
__________
Translated from Astrofizika, Vol. 51, No. 3, pp. 445–460 (August 2008). |
| |
Keywords: | stars novalike-individual TT Ari |
本文献已被 SpringerLink 等数据库收录! |
|