INVESTIGADORES
FLORES TRIVIGNO Matias Gaston
congresos y reuniones científicas
Título:
KELT-17: a chemically peculiar Am star and a hot-Jupiter plane
Autor/es:
J. ALACORIA; PAULA MIQUELARENA; DANIELA CALVO; MARTÍN GIRARDI, G.; FLORES MATÍAS
Lugar:
Córdoba
Reunión:
Congreso; XI Friends of Friends Meeting.; 2021
Institución organizadora:
Instituto de Astronomía Teórica y Experimental (IATE) - Observatorio Astronómico de Córdoba (OAC)
Resumen:
There is very little information to be found in the literature regarding the detection of planets orbiting chemically peculiar stars. We carried out a detailed abundance determination in the planet host star KELT-17 via spectral synthesis. Also, we estimated the stellar radius using two methods: a)comparing the synthetic spectral energy distribution with the available photometric data and the Gaia parallax, and b) using a Bayesian estimation of stellar parameters using stellar isochrones. We found over-abundances of Ti, Cr, Mn, Fe, Ni, Zn, Sr, Y, Zr, and Ba, together with subsolar values of Ca andSc. Notably, the chemical pattern agrees with those recently published for Am stars, making KELT-17 the first exoplanet host whose complete chemical pattern is unambiguously identified with this class. The stellar radius derived by two different methods agrees to each other and with those previouslyobtained in the literature.