Catalog of New K2 Exoplanet Candidates from Citizen Scientists

Planet orbital period versus planet radius for our new candidate sample (filled circles) compared to previous K2 planet candidates (violet open circles) and confirmed planets (brown open circles) from the NASA Exoplanet Archive. Circle size indicates Kepler bandpass magnitude, and color of the new candidates indicates host star effective temperature.

We provide 28 new planet candidates that have been vetted by citizen scientists and expert astronomers.

This catalog contains 9 likely rocky candidates (Rpl<2.0R⊙) and 19 gaseous candidates (Rpl>2.0R⊙). Within this list we find one multi-planet system (EPIC 246042088). These two sub-Neptune (2.99±0.02R⊙ and 3.44±0.02R⊙) planets exist in a near 3:2 orbital resonance. The discovery of this multi-planet system is important in its addition to the list of known multi-planet systems within the K2 catalog, and more broadly in understanding the multiplicity distribution of the exoplanet population (Zink et al. 2019). The candidates on this list are anticipated to generate RV amplitudes of 0.2-18 m/s, many within the range accessible to current facilities.

Jon K. Zink, Kevin K. Hardegree-Ullman, Jessie L. Christiansen, Ian J. M. Crossfield, Erik A. Petigura, Chris J. Lintott, John H. Livingston, David R. Ciardi, Geert Barentsen, Courtney D. Dressing, Alexander Ye, Joshua E. Schlieder, Kevin Acres, Peter Ansorge, Dario Arienti, Elisabeth Baeten, Victoriano Canales Cerd, Itayi Chitsiga, Maxwell Daly, James Damboiu, Martin Ende, Adnan Erdag, Stiliyan Evstatiev, Joseph Henderson, David Hine, Tony Hoffman, Emmanuel Lambrou, Gabriel Murawski, Mark Nicholson, Mason Russell, Hans Martin Schwengeler, Alton Spencer, Aaron Tagliabue, Christopher Tanner, Melina Thévenot, Christine Unsworth, Jouni Uusi-Simola
(Submitted on 1 Mar 2019)

Subjects: Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:1903.00474 [astro-ph.EP] (or arXiv:1903.00474v1 [astro-ph.EP] for this version)
Submission history
From: Jon Zink
[v1] Fri, 1 Mar 2019 18:45:34 UTC (1,196 KB)

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