Sixty Validated Planets from K2 Campaigns 5-8

Livingston, John H.; Crossfield, Ian J. M.; Petigura, Erik A.; Gonzales, Erica J.; Ciardi, David R.; Beichman, Charles A.; Christiansen, Jessie L.; Dressing, Courtney D.; Henning, Thomas; Howard, Andrew W.; Isaacson, Howard; Fulton, Benjamin J.; Kosiarek, Molly; Schlieder, Joshua E.; Sinukoff, Evan; Tamura, Motohide

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Sixty Validated Planets from K2 Campaigns 5-8

MPS-Authors

Livingston, John H.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Crossfield, Ian J. M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Petigura, Erik A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Gonzales, Erica J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ciardi, David R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Beichman, Charles A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Christiansen, Jessie L.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Dressing, Courtney D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Henning, Thomas
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Howard, Andrew W.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Isaacson, Howard
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Fulton, Benjamin J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kosiarek, Molly
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Schlieder, Joshua E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Sinukoff, Evan
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Tamura, Motohide
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

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https://ui.adsabs.harvard.edu/abs/2018AJ....156..277L
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Citation

Livingston, J. H., Crossfield, I. J. M., Petigura, E. A., Gonzales, E. J., Ciardi, D. R., Beichman, C. A., et al. (2018). Sixty Validated Planets from K2 Campaigns 5-8. The Astronomical Journal, 156.

Cite as: https://hdl.handle.net/21.11116/0000-0005-CC7A-D

Abstract

We present a uniform analysis of 155 candidates from the second year of NASA’s K2 mission (Campaigns 5-8), yielding 60 statistically validated planets spanning a range of properties with median values of R _p = 2.5 {R}_\oplus , P = 7.1 days, T _eq = 811 K, and J = 11.3 mag. The sample includes 24 planets in 11 multiplanetary systems, as well as 18 false positives and 77 remaining planet candidates. Of particular interest are 18 planets smaller than 2 {R}_\oplus, five orbiting stars brighter than J = 10 mag, and a system of four small planets orbiting the solar-type star EPIC 212157262. We compute planetary transit parameters and false-positive probabilities using a robust statistical framework and present a complete analysis incorporating the results of an intensive campaign of high-resolution imaging and spectroscopic observations. This work brings the K2 yield to over 360 planets, and by extrapolation, we expect that K2 will have discovered ̃600 planets before the expected depletion of its onboard fuel in late 2018.