Two planetary systems with transiting Earth-sized and super-Earth planets orbiting late-type dwarf stars

Bibcode
2018MNRAS.480L...1D
DOI
10.1093/mnrasl/sly102
Díez Alonso, E.; González Hernández, J. I.; Suárez Gómez, S. L.; Aguado, D. S.; González Gutiérrez, C.; Suárez Mascareño, A.; Cabrera-Lavers, A.; González-Nuevo, J.; Toledo-Padrón, B.; Gracia, J.; de Cos Juez, F. J.; Rebolo, R.
Referencia bibliográfica

Monthly Notices of the Royal Astronomical Society: Letters, Volume 480, Issue 1, p.L1-L5

Fecha de publicación:
10
2018
Número de autores
12
Número de autores del IAC
5
Número de citas
14
Número de citas referidas
12
Descripción
We present two new planetary systems found around cool dwarf stars with data from the K2 mission. The first system was found in K2-239 (EPIC 248545986), characterized in this work as M3.0V and observed in the 14th campaign of K2. It consists of three Earth-sized transiting planets with radii of 1.1, 1.0, and 1.1 R⊕, showing a compact configuration with orbital periods of 5.24, 7.78, and 10.1 d, close to 2:3:4 resonances. The second was found in K2-240 (EPIC 249801827), characterized in this work as M0.5V and observed in the 15th campaign. It consists of two transiting super-Earths with radii 2.0 and 1.8 R⊕ and orbital periods of 6.03 and 20.5 d. The equilibrium temperatures of the atmospheres of these planets are estimated to be in the range of 380-600 K and the amplitudes of signals in transmission spectroscopy are estimated at ˜10 ppm.
Tipo
Con árbitro
Técnicas

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