A new method of representing star count data is shown which has the advantage over traditional methods of giving clear insights into the luminosity functions...
Near-infrared study of the stellar population of Sh2-152
Context. The discovery of new massive star clusters and massive stellar populations in previously known clusters in our Galaxy by means of infrared studies has...
New brown dwarfs in Upper Sco using UKIDSS Galactic Cluster Survey science verification data
We present first results from a deep (J = 18.7), wide-field (6.5deg2) infrared (ZY JHK) survey in the Upper Sco association conducted within the science...
New Isolated Planetary-mass Objects and the Stellar and Substellar Mass Function of the σ Orionis Cluster
We report on our analysis of the VISTA Orion ZY JHKs photometric data (completeness magnitudes of Z = 22.6 and J = 21.0 mag) focusing on a circular area of 2798...
Context: The compact association Cygnus OB2 is known to contain a large population of massive stars, but its total mass is currently a matter of debate. While...
On the buildup of massive early-type galaxies at z ⪉ 1. I. Reconciling their hierarchical assembly with mass downsizing
Context. Several studies have tried to ascertain whether the increase in abundance of the early-type galaxies (E-S0a's) with time is mainly due to major mergers...
On the Dearth of Ultra-faint Extremely Metal-poor Galaxies
Local extremely metal-poor galaxies (XMPs) are of particular astrophysical interest since they allow us to look into physical processes characteristic of the...
On the dust properties of the UV galaxies in the redshift range z 0.6-1.2
Far-infrared observations from the Herschel Space Observatory are used to estimate the infrared (IR) properties of ultraviolet-selected galaxies. We stack the...
On the Galactic globular cluster Delta VHBbump parameter .
We calculated new estimates of the Delta VHBbump parameter for 15 Galactic Globular Clusters (GGCs) using accurate ground-based photometric data. We enlarged...