333 citations · 12.2k across the 357 of their papers we have counts for
17 papers · 1 filter
Far-UV spectroscopy of the planet-hosting star WASP-13: high-energy irradiance, distance, age, planetary mass-loss rate, and circumstellar environment
L. Fossati, K. France, T. Koskinen +3
Several transiting hot Jupiters orbit relatively inactive main-sequence stars. For some of those, the logR'HK activity parameter lies below the basal level (-5.1). Two explanations…
Accuracy of atmospheric parameters of FGK dwarfs determined by spectrum fitting
T. Ryabchikova, N. Piskunov, Yu. Pakhomov +6
We performed extensive tests of the accuracy of atmospheric parameter determination for FGK stars based on the spectrum fitting procedure Spectroscopy Made Easy (SME). Our stellar…
Relating turbulent pressure and macroturbulence across the HR diagram with a possible link to γ-Dor stars
Luca Grassitelli, Luca Fossati, Norbert Langer +3
A significant fraction of the envelope of low- and intermediate-mass stars is unstable to convection, leading to sub-surface turbulent motion. Here, we consider and include the eff…
Chemical composition of intermediate mass stars members of the M6 (NGC 6405) open cluster
Tolgahan Kılıçoğlu, Richard Monier, Jacques Richer +2
We present here the first abundance analysis of 44 late B, A and F-type members of the young open cluster M6 (NGC 6405, age about 75 Myrs). Spectra, covering the 4500 to 5800 Å wav…
A bimodal correlation between host star chromospheric emission and the surface gravity of hot Jupiters
L. Fossati, S. Ingrassia, A. F. Lanza
The chromospheric activity index logR'HK of stars hosting transiting hot Jupiters appears to be correlated with the planets' surface gravity. One of the possible explanations is ba…
Blue supergiants as descendants of magnetic main sequence stars
I. Petermann, N. Langer, N. Castro +1
About 10 of the massive main sequence stars have recently been found to host a strong, large scale magnetic field. Both, the origin and the evolutionary consequences of these f…