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

doi:10.3847/1538-3881/153/2/82

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

Physics Department

Planetary Science Institute
University of Texas at Austin
California Institute of Technology
University of Hawai'i at Mānoa
University of North Carolina at Chapel Hill

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

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Abstract

Two transiting planets have been identified orbiting K2 target EPIC 220674823. One object is an ultra-short-period planet (USP) with a period of just 0.57 days (13.7 hours), while the other has a period of 13.3 days. Both planets are small, with the former having a radius of R_p1= 1.5 R_⊕ and the latter R_p2 = 2.5 R_⊕. Follow-up observations, including radial velocity (with uncertainties of 110 ms⁻¹) and high-resolution adaptive optics imagery, show no signs of stellar companions. EPIC 220674823 is the 12th confirmed or validated planetary system in which an ultra-short-period planet (i.e., having an orbital period less than 1 day) is accompanied by at least one additional planet, suggesting that such systems may be common and must be accounted for in models for the formation and evolution of such extreme systems.

Original language	American English
Article number	82
Journal	Astronomical Journal
Volume	153
Issue number	2
DOIs	https://doi.org/10.3847/1538-3881/153/2/82
State	Published - Feb 2017

Keywords

planetary systems

EGS Disciplines

Physics

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10.3847/1538-3881/153/2/82

Ultra Short Period Planets in em K2 em with Companions A DoubAccepted author manuscript, 461 KBLicense: Other

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Adams, E. R., Jackson, B., Endl, M., Cochran, W. D., Macqueen, P. J., Duev, D. A., Jensen-Clem, R., Maissa Salama, S., Ziegler, C., Baranec, C., Kulkarni, S., Law, N. M., & Riddle, R. (2017). Ultra Short Period Planets in K2 with Companions: A Double Transiting System for Epic 220674823. Astronomical Journal, 153(2), Article 82. https://doi.org/10.3847/1538-3881/153/2/82

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title = "Ultra Short Period Planets in K2 with Companions: A Double Transiting System for Epic 220674823",

abstract = "Two transiting planets have been identified orbiting K2 target EPIC 220674823. One object is an ultra-short-period planet (USP) with a period of just 0.57 days (13.7 hours), while the other has a period of 13.3 days. Both planets are small, with the former having a radius of Rp1 = 1.5 R⊕ and the latter Rp2 = 2.5 R⊕. Follow-up observations, including radial velocity (with uncertainties of 110 ms−1) and high-resolution adaptive optics imagery, show no signs of stellar companions. EPIC 220674823 is the 12th confirmed or validated planetary system in which an ultra-short-period planet (i.e., having an orbital period less than 1 day) is accompanied by at least one additional planet, suggesting that such systems may be common and must be accounted for in models for the formation and evolution of such extreme systems.",

keywords = "planetary systems",

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

year = "2017",

month = feb,

doi = "10.3847/1538-3881/153/2/82",

language = "American English",

volume = "153",

number = "2",

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TY - JOUR

T1 - Ultra Short Period Planets in K2 with Companions

T2 - A Double Transiting System for Epic 220674823

AU - Adams, Elisabeth R.

AU - Jackson, Brian

AU - Endl, Michael

AU - Cochran, William D.

AU - Macqueen, Phillip J.

AU - Duev, Dmitry A.

AU - Jensen-Clem, Rebecca

AU - Maissa Salama, Salama

AU - Ziegler, Carl

AU - Baranec, Christoph

AU - Kulkarni, Shrinivas

AU - Law, Nicholas M.

AU - Riddle, Reed

PY - 2017/2

Y1 - 2017/2

N2 - Two transiting planets have been identified orbiting K2 target EPIC 220674823. One object is an ultra-short-period planet (USP) with a period of just 0.57 days (13.7 hours), while the other has a period of 13.3 days. Both planets are small, with the former having a radius of Rp1 = 1.5 R⊕ and the latter Rp2 = 2.5 R⊕. Follow-up observations, including radial velocity (with uncertainties of 110 ms−1) and high-resolution adaptive optics imagery, show no signs of stellar companions. EPIC 220674823 is the 12th confirmed or validated planetary system in which an ultra-short-period planet (i.e., having an orbital period less than 1 day) is accompanied by at least one additional planet, suggesting that such systems may be common and must be accounted for in models for the formation and evolution of such extreme systems.

AB - Two transiting planets have been identified orbiting K2 target EPIC 220674823. One object is an ultra-short-period planet (USP) with a period of just 0.57 days (13.7 hours), while the other has a period of 13.3 days. Both planets are small, with the former having a radius of Rp1 = 1.5 R⊕ and the latter Rp2 = 2.5 R⊕. Follow-up observations, including radial velocity (with uncertainties of 110 ms−1) and high-resolution adaptive optics imagery, show no signs of stellar companions. EPIC 220674823 is the 12th confirmed or validated planetary system in which an ultra-short-period planet (i.e., having an orbital period less than 1 day) is accompanied by at least one additional planet, suggesting that such systems may be common and must be accounted for in models for the formation and evolution of such extreme systems.

KW - planetary systems

UR - https://www.scopus.com/pages/publications/85012069819

UR - https://scholarworks.boisestate.edu/physics_facpubs/200

U2 - 10.3847/1538-3881/153/2/82

DO - 10.3847/1538-3881/153/2/82

M3 - Article

SN - 0004-6256

VL - 153

JO - Astronomical Journal

JF - Astronomical Journal

IS - 2

M1 - 82

ER -

Ultra Short Period Planets in K2 with Companions: A Double Transiting System for Epic 220674823

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