Context. The Hubble Ultra Deep field (HUDF) is the deepest region ever observed with the Hubble Space Telescope. With the main objective of unveiling the nature...
The Missing Link? Discovery of Pulsations in the Nitrogen-rich PG 1159 Star PG 1144+005
Up to 98% of all single stars will eventually become white dwarfs-stars that link the history and future evolution of the Galaxy, and whose previous evolution...
The Missing Satellites of the Magellanic Clouds? Gaia Proper Motions of the Recently Discovered Ultra-faint Galaxies
According to LCDM theory, hierarchical evolution occurs on all mass scales, implying that satellites of the Milky Way should also have companions. The recent...
The mixed chemistry phenomenon in Galactic Bulge PNe
Aims: We investigate the dual-dust chemistry phenomenon in planetary nebulae (PNe) and discuss reasons for its occurrence, by analyzing Spitzer/IRS spectra of a...
The mmax-Mecl relation, the IMF and IGIMF: probabilistically sampled functions
We introduce a new method to measure the dispersion of mmax values of star clusters and show that the observed sample of mmax is inconsistent with random...
The molecular environment of the pillar-like features in the H ii region G46.5-0.2
At the interface of H ii regions and molecular gas, peculiar structures appear, some of them with pillar-like shapes. Understanding their origin is important...
Do some environments favor efficient conversion of molecular gas into stars? To answer this, we need to be able to estimate the H2 mass. Traditionally, this is...
Spectroscopy and mapping of the type I postmain-sequence source CRL 618, taken with the 45-m antenna of the Nobeyama Radio Observatory and the 12-m NRAO...
The Monitor project: JW 380 - a 0.26-, 0.15-Msolar, pre-main-sequence eclipsing binary in the Orion nebula cluster
We report the discovery of a low-mass (0.26 +/- 0.02, 0.15 +/- 0.01Msolar) pre-main-sequence (PMS) eclipsing binary (EB) with a 5.3d orbital period. JW 380 was...