ULTRA-SHORT-PERIOD PLANETS in K2 with COMPANIONS: A DOUBLE TRANSITING SYSTEM for EPIC 220674823

Elisabeth R. Adams, Brian Jackson, Michael Endl, William D. Cochran, Phillip J. Macqueen, Dmitry A. Duev, Rebecca Jensen-Clem, Salama Maissa Salama, Carl Ziegler, Christoph Baranec, Shrinivas Kulkarni, Nicholas M. Law, Reed Riddle

Research output: Contribution to journalArticlepeer-review

Abstract


Two transiting planets have been found orbiting K2 target EPIC 220674823, with one being an ultra-short-period planet (USP) having a period of 0.57 days (13.7 hours), and the other having a period of 13.3 days. These planets are small, with radii of 1.5 and 2.5 Earth radii respectively. Follow-up studies, including radial velocity observations and high-resolution adaptive optics imagery, revealed no stellar companions. This discovery marks the 12th confirmed or validated planetary system where a USP is accompanied by at least one more planet, indicating that such configurations might be common. This necessitates consideration in models exploring the formation and evolution of extreme planetary systems.
Original languageEnglish
Article number82
JournalAstronomical Journal
Volume153
Issue number2
DOIs
StatePublished - Feb 2017
Externally publishedYes

ASJC Scopus Subject Areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • planetary systems

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