| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 132, Number 2, October II 1998
|
|
|---|---|---|
| Page(s) | 281 - 289 | |
| DOI | https://doi.org/10.1051/aas:1998290 | |
| Published online | 15 October 1998 | |
A spectrographic study of the symbiotic system Hen 1761*
1
Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, 1900 La Plata, Argentina
2
Member of the Carrera del Investigador Científico, Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC), Argentina
3
Member of the Carrera del Investigador Científico, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
Send offprint request to: E. Brandi
Received:
14
August
1997
Accepted:
24
April
1998
This work presents the results of a spectroscopic study in the optical and near infrared region of the symbiotic star Hen 1761. Relative fluxes and radial velocities of emission and absorption lines are obtained on the basis of low, intermediate and high resolution spectra. Our observations show that this scarcely studied object underwent very important spectroscopic variations in the interval 1990-1995. The observed variations are quite similar to those of symbiotic stars where accretion events on a hot dwarf are responsible for an eruptive behavior. Some of the physical parameters of the system are derived.
Key words: stars: emission-lines / symbiotic stars / stars: variable stars / stars: individual: Hen 1761
Based on observations taken at Complejo Astronómico El Leoncito (CASLEO), operated under an agreement between the Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina, the Secretaría de Ciencia y Tecnología de la Nación and the National Universities of La Plata, Córdoba and San Juan.
© European Southern Observatory (ESO), 1998