Determination des rayons de Cepheides. IV. Dimensions de HV 879, HV 899, HV 909, HV 2257, HV 2338, HV 2827 et distance du Grand Nuage de Magellan.
Abstract
We present, for the first time, the radii of six long period cepheids in the Large Magellanic Cloud. The calculations were based on 306 radial-velocity measurements made with the Coravel photoelectric scanner and on previous UBV photometry. In this paper we give a method of determination of the radii based on the Baade-Wesselink concept and using mathematical smoothing for the V, B - V and velocity curves. The method provides very good determinations for the radii. Considerations about the 10 log Te + BC versus (B- V)0 relation lead us to adopt 18.4l ± 0.1 for the distance modulus of the Large Magellanic Cloud.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- March 1987
- Bibcode:
- 1987A&A...175...30I
- Keywords:
-
- Cepheid Variables;
- Computational Astrophysics;
- Magellanic Clouds;
- Radii;
- Size Determination;
- Distance;
- Milky Way Galaxy;
- Periodic Variations;
- Radial Velocity;
- Stellar Spectrophotometry;
- Astrophysics