Katia Cunha

TL;DR: In this article, the authors present the results of a study aimed at assessing the distribution of rotation speeds, N(v sin i) among O- and early B-type stars located in R136, a young (t ~ 1-4 Myr) cluster in the Large Magellanic Cloud (LMC) characterized by a stellar density at least three times that of the densest Galactic clusters in which stellar rotational velocities have been measured.

TL;DR: In this paper, the effective temperatures, surface gravities and metallicities for 21 M-dwarfs observed at high-resolution (R $\sim$ 22,500) in the \textit{H}-band as part of the SDSS-IV APOGEE survey were determined.

TL;DR: In this article, high-resolution infrared spectra of the newly discovered brown dwarf Epsilon Indi Ba were analyzed and the physical parameters of effective temperature and surface gravity were derived by comparison to model spectra calculated from atmospheres computed using unified cloudy models.

TL;DR: In this paper, the projected rotational velocities (vsini) for a sample of 156 Galactic OB star members of 35 clusters, HII regions, and associations were derived using the He I FWHM calibrations.

TL;DR: In this article, the abundances of magnesium, aluminum and sulfur were derived for a sample of 23 low-v \sin i stars belonging to six northern OB associations of the Galactic disk within 1 kpc of the Sun.