Resolving the delta Andromedae spectroscopic binary with direct imaging

Abstract

We present a direct image of the innermost companion to the red giant delta 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.

ApJ, accepted. 10 pages, 3 figures

References in corpus (1)

• Reconnaissance of the HR 8799 Exosolar System II: Astrometry and Orbital Motion

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