The XO Planetary Survey Project - Astrophysical False Positives

Abstract

Searches for planetary transits find many astrophysical false positives as a by-product. There are four main types analyzed in the literature: a grazing-incidence eclipsing binary star, an eclipsing binary star with a small radius companion star, a blend of one or more stars with an unrelated eclipsing binary star, and a physical triple star system. We present a list of 69 astrophysical false positives that had been identified as candidates of transiting planets of the on-going XO survey. This list may be useful in order to avoid redundant observation and characterization of these particular candidates independently identified by other wide-field searches for transiting planets. The list may be useful for those modeling the yield of the XO survey and surveys similar to it. Subsequent observations of some of the listed stars may improve mass-radius relations, especially for low-mass stars. From the candidates exhibiting eclipses, we report three new spectroscopic double-line binaries and give mass function estimations for 15 single lined spectroscopic binaries.

13 pages, 4 figures, accepted to ApJS

References in corpus (12)

• XO-2b: Transiting Hot Jupiter in a Metal-rich Common Proper Motion Binary
• XO-3b: A Massive Planet in an Eccentric Orbit Transiting an F5V Star
• A Transiting Planet of a Sun-like Star
• The Mass and Radius of the Unseen M-Dwarf Companion in the Single-Lined Eclipsing Binary HAT-TR-205-013
• Photometric Detection of a Transit of HD 80606b
• Millimagnitude Photometry for Transiting Extrasolar Planetary Candidates III: Accurate Radius and Period for OGLE-TR-111-b
• SuperWASP-N Extra-solar Planet Candidates Between 18hr < RA < 21hr
• SuperWASP-North Extra-solar Planet Candidates between 3hr < RA < 6hr
• A new detached K7 dwarf eclipsing binary system
• SuperWASP-North Extrasolar Planet Candidates. Candidates from Fields 17hr < RA < 18hr
• SuperWASP-N Extra-solar Planet Candidates from Fields 06hr < RA < 16hr
• Millimagnitude Photometry for Transiting Extrasolar Planetary Candidates IV: The Puzzle of the Extremely Red OGLE-TR-82 Primary Solved

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• Precise time-series photometry for the Kepler-2.0 mission
• On the incidence of eclipsing Am binary systems in the SuperWASP survey
• Transiting Planets with LSST I: Potential for LSST Exoplanet Detection
• Kepler Eclipsing Binary Stars. V. Identification of 31 Eclipsing Binaries in the K2 Engineering Data-set
• The EBLM project -- IX. Five fully convective M-dwarfs, precisely measured with CHEOPS and TESS light curves
• Stellar multiplicity: an interdisciplinary nexus