The basic mechanisms responsible for producing winds from cool, late-type stars are still
largely unknown. We take inspiration from recent progress in understanding solar wind …

We set out to determine stellar labels from low-resolution survey spectra of hot stars,
specifically OBA stars with T eff≳ 7500 K. This fills a gap in the scientific analysis of large …

The rotation rates and magnetic activity of Sun-like and low-mass (≲ 1.4M⊙) main-
sequence stars are known to decline with time, and there now exist several models for the …

To check the impact of the multiple population scenario for globular clusters on their
horizontal branch (HB), we present an analysis of the composition of 110 red HB (RHB) stars …

We used high-resolution spectra acquired with the Magellan Telescope to measure radial
and rotational velocities of approximately 200 stars in the Galactic globular cluster NGC …

Context. Abundance anomalies have been observed in field sdB stars and in nearly all
horizontal branch (HB) stars of globular clusters with T eff> 11 000 K, whatever be the cluster …

We have estimated relativistic corrections for cosmic distance estimates based on stellar
standard candles such as classical Cepheids and stars near the tip of the red giant branch …

Empirical correlations between stellar parameters such as rotation or radius and magnetic
activity diagnostics require estimates of the effective temperatures and the stellar radii. The …

Context. Red giant stars are important tracers of stellar populations in the Galaxy and
beyond, thus accurate modeling of their structure and related observable properties is of …

HYDRA spectra of 287 stars in the field of NGC 2506 from the turnoff through the giant
branch are analyzed. With previous data, 22 are identified as probable binaries; 90 more are …