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6 papers · 2 filters
Kepler photometry of the prototypical Blazhko star RR Lyr: An old friend seen in a new light
K. Kolenberg, S. Bryson, R. Szabó +18
We present our analysis of the long cadence Kepler data for the well-studied Blazhko star RR Lyr, gathered during the first two quarters of the satellite's observations and coverin…
HD 46375: seismic and spectropolarimetric analysis of a young Sun hosting a Saturn-like planet
P. Gaulme, S. Deheuvels, W. W. Weiss +13
HD 46375 is known to host a Saturn-like exoplanet orbiting at 0.04 AU from its host star. Stellar light reflected by the planet was tentatively identified in the 34-day CoRoT run a…
An analysis of the CoRoT-2 system: A young spotted star and its inflated giant planet
Tristan Guillot, Mathieu Havel
Context: CoRoT-2b is one of the most anomalously large exoplanet known. Given its large mass, its large radius cannot be explained by standard evolution models. Interestingly, the…
An Overview of the Rotational Behavior of Metal--Poor Stars
C. Cortés, J. R. P. Silva, A. Recio-Blanco +3
The present paper describes the behavior of the rotational velocity in metal--poor stars ([Fe/H]<-0.5 dex) in different evolutionary stages, based on Vsini values from the literatu…
Neutral material around the B[e] supergiant star LHA 115-S 65: An outflowing disk or a detached Keplerian rotating disk?
Michaela Kraus, Marcelo Borges Fernandes, Francisco X. de Araujo
B[e] supergiants are surrounded by large amounts of hydrogen neutral material, traced by the emission in the optical [OI] lines. This neutral material is most plausibly located wit…
The NIR Ca II triplet at low metallicity - Searching for extremely low-metallicity stars in classical dwarf galaxies
Else Starkenburg, Vanessa Hill, Eline Tolstoy +9
The NIR Ca II triplet absorption lines have proven to be an important tool for quantitative spectroscopy of individual red giant branch stars in the Local Group, providing a better…