Variable dust obscuration in the symbiotic Mira and very slow nova, HM Sge.
Abstract
New infrared photometry is presented for the symbiotic Mira, HM Sge. Using this and published data a pulsation period of 527 day is derived. In addition to the normal pulsational modulation, the light curve for HM Sge has shown a distinct fading and reddening, starting in 1985. This is interpreted as a dust-obscuration event, and its possible association with the binary orbit is discussed.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- March 1989
- DOI:
- 10.1093/mnras/237.1.45P
- Bibcode:
- 1989MNRAS.237P..45M
- Keywords:
-
- Cosmic Dust;
- Infrared Photometry;
- Mira Variables;
- Novae;
- Stellar Occultation;
- Symbiotic Stars;
- Interstellar Extinction;
- Light Curve;
- M Stars;
- Stellar Color;
- Astrophysics