Photometry of yellow semiregular variables : HR 8752 (= V 509 Cassiopeiae).
Abstract
New photoelectric photometry of the yellow semiregular variable HR 8752 (= V509 Cas) made between 1986 and 1991 is presented. Its light curve is very complex, showing a steady decrease in brightness and colors. Period analysis revealed two (possibly three) periods with changing amplitudes. The origin of the amplitude changes may be a change from fundamental to overtone pulsation, though other explanations are equally possible. The evolutionary state of the variable is uncertain. A possible connnection between HR 8752 and the H II zone S151 is pointed out.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- September 1992
- Bibcode:
- 1992A&A...263..123P
- Keywords:
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- Semiregular Variable Stars;
- Stellar Spectrophotometry;
- Supergiant Stars;
- H Ii Regions;
- Light Curve;
- Power Spectra;
- Stellar Color;
- Stellar Evolution;
- Stellar Oscillations;
- Astrophysics