Katrien Kolenberg

TL;DR: Asteroseismology involves probing the interiors of stars and quantifying their global properties, such as radius and age, through observationsof normal modes of oscillation as discussed by the authors.

TL;DR: In this article, preliminary asteroseismic results from Kepler on three G-type stars are presented, made at one-minute cadence during the first 33.5d of science operations, reveal high signal-to-noise solar-like oscillation spectra in all three stars: about 20 modes of oscillation may be clearly distinguished in each star.

TL;DR: The first Gaia Data Release contains the Tycho-Gaia Astrometric Solution (TGAS) component by means of the astrometric data for open clusters as discussed by the authors, which is a subset of about 2 million stars for which, besides the position and photometry, the proper motion and parallax are calculated using Hipparcos and Tycho 2 positions in 1991.

TL;DR: The first detection of the period doubling phenomenon is reported in the Kepler RR Lyrae stars RR Lyr, V808 Cyg and V355 Lyr in this article, and the effect was found to be stronger during certain phases of the modulation cycle.

TL;DR: In this paper, the first results of the analyses of selected RR Lyrae stars for which data have been obtained by the Kepler Mission are presented, showing that at least 40% of the RR LyRAe stars in their sample showing modulation, confirming the high incidence rate that was only found in recent highprecision studies.