Anthony G. A. Brown

TL;DR: In this paper, a Gaussian filter was used to smoothing the star distribution through a gaussian filter to construct three dimensional density maps for early-type stars (UMS) and pre-main sequence (PMS) sources.

TL;DR: In this article, the status of (sub)stellar candidate companions of A and late-B members was determined by a comparison with isochrones and statistical arguments, showing that the physical mechanism for the formation of brown dwarfs around intermediate mass stars is similar to that of stellar companions, and that the embryo ejection mechanism does not need to be invoked in order to explain the small number of brown dwarf companions.

TL;DR: In this article, a new analysis of the Gaia DR2 parallax offset for nearly 3000 red-giant branch (RGB) and 2200 red clump (RC) stars observed by Kepler, as well as about 500 and 700 red giants selected by the K2 Galactic Archaeology Program in campaigns 3 and 6.

TL;DR: In this article, the broad and medium-band set of photometric filters adopted as the baseline for the European Gaia astrometry mission is presented, along with the criteria and the methodology on which this choice has been based.

TL;DR: In this paper, the authors used the first data release of the Gaia mission to explore the three-dimensional arrangement and age ordering of the many stellar groups toward the Orion OB association, aiming at a new classification and characterization of the stellar population not embedded in the Orion A and B molecular clouds.