Studies of large-amplitude Delta Scuti variables. 2: DY Herculis
| Autor: | William J. F. Wilson, Eugene F. Milone, D. J. I. Fry, S. J. Schiller |
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| Rok vydání: | 1994 |
| Předmět: |
Physics
Absolute magnitude Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Color index Luminosity Radial velocity Photometry (astronomy) Apparent magnitude Amplitude Space and Planetary Science Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Variable star Astrophysics::Galaxy Astrophysics |
| Zdroj: | Publications of the Astronomical Society of the Pacific. 106:1120 |
| ISSN: | 1538-3873 0004-6280 |
| DOI: | 10.1086/133488 |
| Popis: | This is the second paper in a series on large-amplitude delta Scuti stars intended to determine Baade-Wesselink radii and luminosities with precision. The first paper discussed our method of analysis and its application to EH Librae; in this paper we discuss the observations and analysis of DY Herculis. Optical and infrared photometry and cross-correlated radial velocity data have been obtained and analyzed. Fourier representations for the UBVRIJHK light curves and for the radial velocity curves were used to derive a value for the minimum radius for each of sixty combinations of flux and color index. From these we adopt a mean value for the minimum radius of Rmin = 2.77 ± 0.20 Rsun. When combined with effective temperatures from Breger et al. (1978), we find a mean bolometric luminosity of = 21.70 Lsun and a mean absolute magnitude of = 24.56 Lsun and = 1.27. |
| Databáze: | OpenAIRE |
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