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BGLS: A Bayesian formalism for the generalised Lomb-Scargle periodogram
A. Mortier, J. P. Faria, C. M. Correia +2
Context. Frequency analyses are very important in astronomy today, not least in the ever-growing field of exoplanets, where short-period signals in stellar radial velocity data are…
Stars with and without planets: Where do they come from?
V. Zh. Adibekyan, J. I. Gonzalez Hernandez, E. Delgado Mena +5
A long and thorough investigation of chemical abundances of planet-hosting stars that lasted for more than a decade has finally beared fruit. We explore a sample of 148 solar-like…
Radial velocity confirmation of Kepler-91 b. Additional evidence of its planetary nature using the Calar Alto/CAFE instrument
J. Lillo-Box, D. Barrado, Th. Henning +6
The object transiting the star Kepler-91 was recently assessed as being of planetary nature. The confirmation was achieved by analysing the light-curve modulations observed in the…
Metallicity of M dwarfs IV. A high-precision [Fe/H] and Teff technique from high-resolution optical spectra for M dwarfs
V. Neves, X. Bonfils, N. C. Santos +4
Aims. In this work we develop a technique to obtain high precision determinations of both metallicity and effective temperature of M dwarfs in the optical. Methods. A new method is…
Improvements on analytic modelling of stellar spots
M. Montalto, G. Boué, M. Oshagh +3
In this work we present the solution of the stellar spot problem using the Kelvin-Stokes theorem. Our result is applicable for any given location and dimension of the spots on the…
Impact of occultations of stellar active regions on transmission spectra: Can occultation of a plage mimic the signature of a blue sky?
M. Oshagh, N. C. Santos, D. Ehrenreich +4
Transmission spectroscopy during planetary transits, which is based on the measurements of the variations of planet-to-star radius ratio as a function of wavelength, is a powerful…