We report the discovery of K2-98b (EPIC 211391664b), a transiting Neptune-size planet monitored by the K2 mission during its Campaign 5. We combine the K2 time-series data with ground-based photometric and spectroscopic follow-up observations to confirm the planetary nature of the object and derive its mass, radius, and orbital parameters. K2-98b is a warm Neptune-like planet in a 10 day orbit around a V = 12.2 mag F-type star with M ∗ = 1.074 ±0.042 M o, R ∗ = R o, and age of . We derive a planetary mass and radius of M p = 32.2 ±8.1 M ⊕ and R p = R ⊕. K2-98b joins the relatively small group of Neptune-size planets whose mass and radius have been derived with a precision better than 25%. We estimate that the planet will be engulfed by its host star in ∼3 Gyr, due to the evolution of the latter toward the red giant branch.

K2-98b: A 32 M ⊕ NEPTUNE-SIZE PLANET in A 10 DAY ORBIT TRANSITING AN F8 STAR

PRADA MORONI, PIER GIORGIO;
2016

Abstract

We report the discovery of K2-98b (EPIC 211391664b), a transiting Neptune-size planet monitored by the K2 mission during its Campaign 5. We combine the K2 time-series data with ground-based photometric and spectroscopic follow-up observations to confirm the planetary nature of the object and derive its mass, radius, and orbital parameters. K2-98b is a warm Neptune-like planet in a 10 day orbit around a V = 12.2 mag F-type star with M ∗ = 1.074 ±0.042 M o, R ∗ = R o, and age of . We derive a planetary mass and radius of M p = 32.2 ±8.1 M ⊕ and R p = R ⊕. K2-98b joins the relatively small group of Neptune-size planets whose mass and radius have been derived with a precision better than 25%. We estimate that the planet will be engulfed by its host star in ∼3 Gyr, due to the evolution of the latter toward the red giant branch.
Barragán, Oscar; Grziwa, Sascha; Gandolfi, Davide; Fridlund, Malcolm; Endl, Michael; Deeg, Hans J.; Cagigal, Manuel P.; Lanza, Antonino F.; PRADA MORONI, PIER GIORGIO; Smith, Alexis M. S.; Korth, Judith; Bedell, Megan; Cabrera, Juan; Cochran, William D.; Cusano, Felice; Csizmadia, Szilard; Eigmüller, Philipp; Erikson, Anders; Guenther, Eike W.; Hatzes, Artie P.; Nespral, David; Pätzold, Martin; Prieto Arranz, Jorge; Rauer, Heike
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/835967
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