The mathematical simplicity of black holes, combined with their links to some of the most
energetic events in the universe, means that black holes are key objects for fundamental …

There are six main things which any non-baryonic dark matter theory should endeavour to
explain:(1) The basic dark matter particle properties [mass, stability, darkness];(2) The …

We review recent determinations of the present‐day mass function (PDMF) and initial mass
function (IMF) in various components of the Galaxy—disk, spheroid, young, and globular …

Aims. The EROS-2 project was designed to test the hypothesis that massive compact halo
objects (the so-called “machos”) could be a major component of the dark matter halo of the …

We present an inventory of the cosmic mean densities of energy associated with all the
known states of matter and radiation at the present epoch. The observational and theoretical …

In order to determine an upper bound for the mass of the massive compact halo objects
(MACHOs), we use the halo binaries contained in a recent catalog by Allen & Monroy …

We present an extensive and pure sample of ultrawide binary stars with separations of
0.01≲ s/pc≲ 1 in the solar neighborhood. Using data from Gaia DR2, we define kinematic …

We simulate the evolution of halo wide binaries in the presence of the massive compact halo
objects (MACHOs) and compare our results to the sample of wide binaries in a companion …

Progress in observational cosmology over the past five years has established that the
Universe is dominated dynamically by dark matter and dark energy. Both these new and …

Context. Transition disks offer the extraordinary opportunity to look for newly born planets
and to investigate the early stages of planet formation. Aim. In this context we observed the …