PREDNASAJUCI / LECTURER :

Dmytro Orikhovskyi

(1) Astronomical Institute, Slovak Academy of Sciences,
059 60 Tatranská Lomnica

NAZOV / TITLE :

Resolving hot Jupiters using least-squares deconvolution method

ABSTRAKT / ABSTRACT :

Hot Jupiters are a unique group of planets that cannot be found in our Solar
system. They are placed closer than 0.1 AU from their parent stars, which often results
in transits that can be detected by photometric observations. Interiors of hot stars
are able to conserve their angular momentum for longer time, keeping rotational
velocities high for whole lifetime. If there is a planet orbiting such star, its orbit
may change significantly over time. The planet may become highly eccentric, misaligned
with respect to the rotational axis of the star or even undergo tidally-induced
precession.  Up to date, only 4 exoplanets are confirmed to be nodally precessing, but
their number may grow with more long-term observations. In this seminar, I present the
spectroscopic analysis of three exoplanet hosts using a method which potentially can
lead to more precise measurements of stellar rotation profile, in which we are able to
see the Doppler shadow of the transiting planet.