K2-138 g: Spitzer Spots a Sixth Planet for the Citizen Science System

Kevin K. Hardegree-Ullman; Jessie L. Christiansen; David R. Ciardi; Ian J. M. Crossfield; Courtney D. Dressing; John H. Livingston; Kathryn Volk; Eric Agol; Thomas Barclay; Geert Barentsen; Björn Benneke; Varoujan Gorjian; Martti H. Kristiansen

doi:10.3847/1538-3881/abeab0

K2-138 g: Spitzer Spots a Sixth Planet for the Citizen Science System

Kevin K. Hardegree-Ullman
, Jessie L. Christiansen
, David R. Ciardi
, Ian J. M. Crossfield
, Courtney D. Dressing
, John H. Livingston
, Kathryn Volk
, Eric Agol
, Thomas Barclay
, Geert Barentsen
, Björn Benneke
, Varoujan Gorjian
, Martti H. Kristiansen

University of California at Berkeley
California Institute of Technology
University of Kansas
The University of Tokyo
University of Arizona
University of Washington
NASA Goddard Space Flight Center
Bay Area Environmental Research Institute
Université de Montréal

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

K2 greatly extended Kepler's ability to find new planets, but it was typically limited to identifying transiting planets with orbital periods below 40 days. While analyzing K2 data through the Exoplanet Explorers project, citizen scientists helped discover one super-Earth and four sub-Neptune sized planets in the relatively bright (V = 12.21, K = 10.3) K2-138 system, all which orbit near 3:2 mean-motion resonances.

Original language	English
Article number	219
Journal	Astronomical Journal
Volume	161
Issue number	5
Number of pages	12
ISSN	0004-6256
DOIs	https://doi.org/10.3847/1538-3881/abeab0
Publication status	Published - 2021

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Hardegree-Ullman, K. K., Christiansen, J. L., Ciardi, D. R., Crossfield, I. J. M., Dressing, C. D., Livingston, J. H., Volk, K., Agol, E., Barclay, T., Barentsen, G., Benneke, B., Gorjian, V., & Kristiansen, M. H. (2021). K2-138 g: Spitzer Spots a Sixth Planet for the Citizen Science System. Astronomical Journal, 161(5), Article 219 . https://doi.org/10.3847/1538-3881/abeab0

@article{178cfb3575174e2da982ccf085204661,

title = "K2-138 g: Spitzer Spots a Sixth Planet for the Citizen Science System",

abstract = "K2 greatly extended Kepler's ability to find new planets, but it was typically limited to identifying transiting planets with orbital periods below 40 days. While analyzing K2 data through the Exoplanet Explorers project, citizen scientists helped discover one super-Earth and four sub-Neptune sized planets in the relatively bright (V = 12.21, K = 10.3) K2-138 system, all which orbit near 3:2 mean-motion resonances. ",

author = "Hardegree-Ullman, \{Kevin K.\} and Christiansen, \{Jessie L.\} and Ciardi, \{David R.\} and Crossfield, \{Ian J. M.\} and Dressing, \{Courtney D.\} and Livingston, \{John H.\} and Kathryn Volk and Eric Agol and Thomas Barclay and Geert Barentsen and Bj{\"o}rn Benneke and Varoujan Gorjian and Kristiansen, \{Martti H.\}",

year = "2021",

doi = "10.3847/1538-3881/abeab0",

language = "English",

volume = "161",

journal = "Astronomical Journal",

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T1 - K2-138 g: Spitzer Spots a Sixth Planet for the Citizen Science System

AU - Hardegree-Ullman, Kevin K.

AU - Christiansen, Jessie L.

AU - Ciardi, David R.

AU - Crossfield, Ian J. M.

AU - Dressing, Courtney D.

AU - Livingston, John H.

AU - Volk, Kathryn

AU - Agol, Eric

AU - Barclay, Thomas

AU - Barentsen, Geert

AU - Benneke, Björn

AU - Gorjian, Varoujan

AU - Kristiansen, Martti H.

PY - 2021

Y1 - 2021

N2 - K2 greatly extended Kepler's ability to find new planets, but it was typically limited to identifying transiting planets with orbital periods below 40 days. While analyzing K2 data through the Exoplanet Explorers project, citizen scientists helped discover one super-Earth and four sub-Neptune sized planets in the relatively bright (V = 12.21, K = 10.3) K2-138 system, all which orbit near 3:2 mean-motion resonances.

AB - K2 greatly extended Kepler's ability to find new planets, but it was typically limited to identifying transiting planets with orbital periods below 40 days. While analyzing K2 data through the Exoplanet Explorers project, citizen scientists helped discover one super-Earth and four sub-Neptune sized planets in the relatively bright (V = 12.21, K = 10.3) K2-138 system, all which orbit near 3:2 mean-motion resonances.

U2 - 10.3847/1538-3881/abeab0

DO - 10.3847/1538-3881/abeab0

M3 - Journal article

SN - 0004-6256

VL - 161

JO - Astronomical Journal

JF - Astronomical Journal

IS - 5

M1 - 219

ER -

K2-138 g: Spitzer Spots a Sixth Planet for the Citizen Science System

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