The Baade-Wesselink Method and the Distances to RR Lyrae Stars. VII. The Field Stars SW Andromedae and DX Delphini and a Comparison of Recent Baade-Wesselink Analyses
Abstract
New BVK photometry and radial velocities from high-resolution spectroscopy are presented for the metal-rich ab-type RR Lyrae star SW Andromedae. These data, along with previously published optical data, are used to derive the distance and absolute magnitudes of this star, employing the IR surface brightness version of the Baade-Wesselink method. These results are compared with other recent applications of the Baade-Wesselink method, and they are found to agree to within 0.10 mag when the appropriate phase intervals are considered.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 1992
- DOI:
- 10.1086/171046
- Bibcode:
- 1992ApJ...386..646J
- Keywords:
-
- Astronomical Photometry;
- Astronomical Spectroscopy;
- Stellar Magnitude;
- Stellar Oscillations;
- Variable Stars;
- Infrared Astronomy;
- Metallicity;
- Radial Velocity;
- Stellar Luminosity;
- Astrophysics;
- STARS: FUNDAMENTAL PARAMETERS;
- STARS: INDIVIDUAL CONSTELLATION NAME: DX DELPHINI;
- STARS: INDIVIDUAL CONSTELLATION NAME: SW ANDROMEDAE;
- STARS: OSCILLATIONS;
- STARS: VARIABLES: OTHER RR LYRAE