Time-resolved optical spectroscopy of IR GEM in quiescence

Lazaro, C.; Martinez-Pais, I. G.; Arevalo, M. J.; Solheim, J. E.
Referencia bibliográfica

Astronomical Journal (ISSN 0004-6256), vol. 101, Jan. 1991, p. 196-200.

Fecha de publicación:
1
1991
Número de autores
4
Número de autores del IAC
3
Número de citas
3
Número de citas referidas
3
Descripción
Spectroscopic observations of the dwarf nova IR Gem in the range 4000-7000 A, covering a whole orbital period, are presented. The dates of the observations (February 3-6, 1987) were at the end of the decline from an outburst and the beginning of quiescence. Evidence of phase related variations in H-alpha equivalent width is found, showing a maximum at phase 0.5. The mean quiescence spectra are compared with published accretion disk models, deriving a mass transfer rate for the system of about 10 to the -10th solar mass/yr, but it is shown that these models do not reproduce satisfactorily the observed spectra.