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55 papers · 2 filters
Towards precise asteroseismology of solar-like stars
A. Grigahcène, M. -A. Dupret, S. G. Sousa +4
Adiabatic modeling of solar-like oscillations cannot exceed a certain level of precision for fitting individual frequencies. This is known as the problem of near surface effects on…
Fast core rotation in red-giant stars revealed by gravity-dominated mixed modes
Paul G. Beck, Josefina Montalban, Thomas Kallinger +21
When the core hydrogen is exhausted during stellar evolution, the central region of a star contracts and the outer envelope expands and cools, giving rise to a red giant, in which…
A detailed X-ray investigation of zeta Puppis I. The dataset and some preliminary results
Yael Naze, Carlos Arturo Flores, Gregor Rauw
Aims: zeta Puppis, one of the closest and brightest massive stars, was the first early-type object observed by the current generation of X-ray observatories. These data provided so…
High-resolution X-ray spectroscopy of the magnetic Of?p star HD148937
Y. Naze, S. A. Zhekov, N. R. Walborn
High-resolution data of the peculiar magnetic massive star HD148937 were obtained with Chandra-HETGS, and are presented here in combination with a re-analysis of the older XMM-RGS…
Modelling a high-mass red giant observed by CoRoT
F. Baudin, C. Barban, M. J. Goupil +15
The G6 giant HR\,2582 (HD\,50890) was observed by CoRoT for approximately 55 days. Mode frequencies are extracted from the observed Fourier spectrum of the light curve. Numerical s…
The first X-ray survey of Galactic Luminous Blue Variables
Yael Naze, Gregor Rauw, Damien Hutsemekers
Aims: The X-ray emission of massive stars has been studied when these objects are in their main-sequence phase, as well as in their Wolf-Rayet phase. However, the X-ray properties…