Andreas Koch

TL;DR: The Gaia-ESO Public Spectroscopic Survey has begun and will obtain high quality spectroscopy of some 100000 Milky Way stars, in the field and in open clusters, down to magnitude 19, systematically.

TL;DR: A synthesis of recent photometric and kinematic data for several of the most dark matter dominated galaxies, the dwarf spheroidal Galactic satellites, and compare them to star clusters provides new information about the nature of the dominant form of dark matter.

TL;DR: In this paper, the authors present a synthesis of recent photometric and kinematic data for several of the most dark-matter dominated galaxies, and interpret them in terms of a more fundamental pair of intrinsic properties of dark matter itself: dark matter forms cored mass distributions, with a core scale length of greater than about 100pc, and always has a maximum central mass density with a narrow range.

TL;DR: In this article, the central surface density of galaxy dark matter halos is found to be 2.15 ± 0.2, in units of log(M⊙ pc −2 ).

TL;DR: In this article, the authors reported the identification of the neutron-capture element strontium in a reanalysis of the kilonova AT2017gfo, which was found following the discovery of the Neutron-Star merger GW170817 by gravitational-wave detectors.