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885 papers · 1 filter
A spectroscopic survey of faint, high-galactic latitude red clump stars. II. The medium resolution sample
T. Saguner, U. Munari, M. Fiorucci +1
Aims. The goal of our survey is to provide accurate and multi-epoch radial velocities, atmospheric parameters (Teff, log g and [M/H]), distances and space velocities of faint Red C…
Radiative hydrodynamics simulations of red supergiant stars. III. Spectro-photocentric variability, photometric variability, and consequences on Gaia measurements
A. Chiavassa, E. Pasquato, A. Jorissen +8
Context. It has been shown that convection in red supergiant stars gives rise to large granules causing surface inhomogeneities together with shock waves in the photosphere. The re…
Photospheric and coronal abundances in solar-type stars: the peculiar case of Tau Bootis
A. Maggio, J. Sanz-Forcada, L. Scelsi
Chemical abundances in solar-type stars are a much debated topic. Planet-hosting stars are known to be metal-rich, but whether or not this peculiarity applies also to the chemical…
Cosmic Ray Acceleration in Supernova Remnants
Pasquale Blasi
We review the main observational and theoretical facts about acceleration of Galactic cosmic rays in supernova remnants, discussing the arguments in favor and against a connection…
Gas temperature profiles in galaxy clusters with Swift XRT: observations and capabilities to map near R200
A. Moretti, F. Gastaldello, S. Ettori +1
We investigate the possibility of using the X-ray telescope (XRT) on board the Swift satellite to improve the current accuracy of the ICM temperature measurements in the region clo…
The subgiant branch of omega Cen seen through high-resolution spectroscopy. I. The first stellar generation in omega Centauri?
E. Pancino, A. Mucciarelli, L. Sbordone +4
We analysed high-resolution UVES spectra of six stars belonging to the subgiant branch of omega Centauri, and derived abundance ratios of 19 chemical elements (namely Al, Ba, C, Ca…