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.
Bibliographical reference

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

Advertised on:
10
2018
Number of authors
12
IAC number of authors
5
Citations
14
Refereed citations
13
Description
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.
Type
Refereed
Techniques

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