1. Planet Hunters X: Searching for Nearby Neighbors of 75 Planet and Eclipsing Binary Candidates from the K2 Kepler Extended Mission
- Author
-
Megan E. Schwamb, Johann Sejpka, Kevin Schawinski, Tom Jacobs, Alexander Venner, Joseph R. Schmitt, Kian J. Jek, Ivan Terentev, Martti H. Kristiansen, Debra A. Fischer, Troy Winarski, Sascha T. Ishikawa, Chris Lintott, Andrei Tokovinin, Mark Omohundro, Ji Wang, Tabetha S. Boyajian, Robert Gagliano, Stuart Lynn, Arvin Joseff V. Tan, Daryll LaCourse, Hans Martin Schwengeler, Alex Weiksnar, John M. Brewer, and Allan R. Schmitt
- Subjects
010504 meteorology & atmospheric sciences ,FOS: Physical sciences ,Binary number ,High multiplicity ,01 natural sciences ,Kepler ,law.invention ,Telescope ,Planet ,law ,0103 physical sciences ,Binary star ,010303 astronomy & astrophysics ,planetary systems ,0105 earth and related environmental sciences ,Earth and Planetary Astrophysics (astro-ph.EP) ,Physics ,Astronomy ,binaries: eclipsing ,techniques: high angular resolution ,Astronomy and Astrophysics ,Exoplanet ,Stars ,binaries: general ,Space and Planetary Science ,Astrophysics - Earth and Planetary Astrophysics - Abstract
We present high-resolution observations of a sample of 75 K2 targets from Campaigns 1-3 using speckle interferometry on the Southern Astrophysical Research (SOAR) telescope and adaptive optics (AO) imaging at the Keck II telescope. The median SOAR $I$-band and Keck $K_s$-band detection limits at 1" were $\Delta m_{I}=4.4$~mag and $\Delta m_{K_s}=6.1$~mag, respectively. This sample includes 37 stars likely to host planets, 32 targets likely to be eclipsing binaries (EBs), and 6 other targets previously labeled as likely planetary false positives. We find nine likely physically bound companion stars within 3" of three candidate transiting exoplanet host stars and six likely EBs. Six of the nine detected companions are new discoveries; one of the six, EPIC 206061524, is associated with a planet candidate. Among the EB candidates, companions were only found near the shortest period ones ($P, Comment: Accepted in AJ
- Published
- 2016