The Eclipsing Star AR Monocerotis.
Abstract
The eclipsing star AR Monocerotis, with a period of 21.208 days, has a light-curve of fi Lyrae form, as determined from 1441 estimates on Harvard plates. Relative dimensions were obtained from this photo- graphic light-curve and from a rediscussion oT the visual light-curves of Florja and Lause. The relative mean radii of the K and the unknown components are 0.332 and 0.086 in photographic light, 0.265 and 0.133 in visual light. The star thus shares with SX and RX Cassiopeiae the peculiarity of possessing di- mensions that apparently differ with wave length. Photographic and visual light-curves give values of the inclination of the orbit as 76~5° and 82.5°. On the basis of the mass function determined by Sahade and Cesco and an adopted mass ratio (?/K) of ~, radii for the K and the unknown star are found to be 22.7 0 and 5.9 0 in photographic and 18.1 0 and 9.0 0 in visual light. With assumed temperatures of 4ç)()()° and 60000 for the two stars, absolute visual magnitudes of 0.52 and 0.96 are deduced from the photographic light-curve and 1.01 and 0.06 from the visual light-curve. The photographic light-curve is considerably the better determined, and conclusions drawn from it are regarded as of the greater weight
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 1944
- DOI:
- 10.1086/144665
- Bibcode:
- 1944ApJ...100..251P