Resolving the Delta Andromedae Spectroscopic Binary with Direct Imaging
Abstract
We present a direct image of the innermost companion to the red giant δ Andromedae using the Stellar Double Coronagraph at the Palomar Observatory. We use a Markov Chain Monte Carlo based algorithm to simultaneously reduce the data and perform astrometry and photometry of the companion. We determine that the companion is most likely a main sequence K-type star and is certainly not the previously hypothesized white dwarf.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 2015
- DOI:
- 10.1088/0004-637X/809/1/11
- arXiv:
- arXiv:1506.07517
- Bibcode:
- 2015ApJ...809...11B
- Keywords:
-
- binaries: spectroscopic;
- instrumentation: adaptive optics;
- instrumentation: high angular resolution;
- stars: imaging;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- ApJ, accepted. 10 pages, 3 figures