Using classical model atmospheres and an LTE analysis, Mg isotope ratios 24Mg:25Mg:26Mg are measured in 32 Hyades dwarfs covering effective temperatures 4000K
Magnesium isotopes: a tool to understand self-enrichment in globular clusters
A critical issue in the asymptotic giant branch (AGB) self-enrichment scenario for the formation of multiple populations in globular clusters (GCs) is the...
Magnetic activities on two single-lined RS Canum Venaticorum binaries IM Pegasi and σ Geminorum
We present the study on continuous high-resolution spectroscopic observations of two long-period single-lined RS Canum Venaticorum (RS CVn) binary stars IM...
Magnetic activity cycles in solar-like stars: The cross-correlation technique of p-mode frequency shifts
Aims: We set out to study the use of cross-correlation techniques to infer the frequency shifts that are induced by changing magnetic fields in p-mode...
Magnetic Activity Evolution of Solar-like Stars. I. S <SUB>ph</SUB>-Age Relation Derived from Kepler Observations
The ages of solar-like stars have been at the center of many studies such as exoplanet characterization or Galactic-archeology. While ages are usually computed...
Magnetic activity in the photosphere of CoRoT-Exo-2a. Active longitudes and short-term spot cycle in a young Sun-like star
Context: The space experiment CoRoT has recently detected transits by a hot Jupiter across the disc of an active G7V star (CoRoT-Exo-2a) that can be considered...
Context. The study of stellar activity is important because it can provide new constraints for dynamo models when combined with surface rotation rates and the...
Magnetic activity of red giants: Correlation between the amplitude of solar-like oscillations and chromospheric indicators
Previous studies have found that red giants (RGs) in close binary systems undergoing spin-orbit resonance exhibit an enhanced level of magnetic activity with...
Magnetic and Dynamical Photospheric Disturbances Observed During an M3.2 Solar Flare
This Letter reports on a set of full-Stokes spectropolarimetric observations in the near-infrared He i 10830 Å spectral region covering the pre-flare, flare...