TY - JOUR
T1 - A nearby m star with three transiting super-earths discovered by k2
AU - Crossfield, Ian J.M.
AU - Petigura, Erik
AU - Schlieder, Joshua E.
AU - Howard, Andrew W.
AU - Fulton, B. J.
AU - Aller, Kimberly M.
AU - Ciardi, David R.
AU - Lépine, Sébastien
AU - Barclay, Thomas
AU - Pater, Imke De
AU - Kleer, Katherine De
AU - Quintana, Elisa V.
AU - Christiansen, Jessie L.
AU - Schlafly, Eddie
AU - Kaltenegger, Lisa
AU - Crepp, Justin R.
AU - Henning, Thomas
AU - Obermeier, Christian
AU - Deacon, Niall
AU - Weiss, Lauren M.
AU - Isaacson, Howard T.
AU - Hansen, Brad M.S.
AU - Liu, Michael C.
AU - Greene, Tom
AU - Howell, Steve B.
AU - Barman, Travis
AU - Mordasini, Christoph
N1 - Publisher Copyright:
© 2015. The American Astronomical Society. All rights reserved..
PY - 2015/5/1
Y1 - 2015/5/1
N2 - Small, cool planets represent the typical end-products of planetary formation. Studying the architectures of these systems, measuring planet masses and radii, and observing these planets' atmospheres during transit directly informs theories of planet assembly, migration, and evolution. Here we report the discovery of three small planets orbiting a bright (Ks = 8.6 mag) M0 dwarf using data collected as part of K2, the new ecliptic survey using the re-purposed Kepler spacecraft. Stellar spectroscopy and K2 photometry indicate that the system hosts three transiting planets with radii 1.5-2.1 , straddling the transition region between rocky and increasingly volatile-dominated compositions. With orbital periods of 10-45 days the planets receive just 1.5-10x the flux incident on Earth, making these some of the coolest small planets known orbiting a nearby star; planet d is located near the inner edge of the system's habitable zone. The bright, low-mass star makes this system an excellent laboratory to determine the planets' masses via Doppler spectroscopy and to constrain their atmospheric compositions via transit spectroscopy. This discovery demonstrates the ability of K2 and future space-based transit searches to find many fascinating objects of interest.
AB - Small, cool planets represent the typical end-products of planetary formation. Studying the architectures of these systems, measuring planet masses and radii, and observing these planets' atmospheres during transit directly informs theories of planet assembly, migration, and evolution. Here we report the discovery of three small planets orbiting a bright (Ks = 8.6 mag) M0 dwarf using data collected as part of K2, the new ecliptic survey using the re-purposed Kepler spacecraft. Stellar spectroscopy and K2 photometry indicate that the system hosts three transiting planets with radii 1.5-2.1 , straddling the transition region between rocky and increasingly volatile-dominated compositions. With orbital periods of 10-45 days the planets receive just 1.5-10x the flux incident on Earth, making these some of the coolest small planets known orbiting a nearby star; planet d is located near the inner edge of the system's habitable zone. The bright, low-mass star makes this system an excellent laboratory to determine the planets' masses via Doppler spectroscopy and to constrain their atmospheric compositions via transit spectroscopy. This discovery demonstrates the ability of K2 and future space-based transit searches to find many fascinating objects of interest.
KW - eclipses
KW - stars: individual (EPIC 201367065)
KW - tar.gz file
KW - techniques: photometric
KW - techniques: spectroscopic Supporting material: data behind figure
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U2 - 10.1088/0004-637X/804/1/10
DO - 10.1088/0004-637X/804/1/10
M3 - Article
AN - SCOPUS:84935035834
SN - 0004-637X
VL - 804
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 10
ER -