We constrain the iron abundance in a sample of 33 low-ionization Galactic planetary nebulae (PNe) using [Fe III] lines and correcting for the contribution of...
The Kinematics of the Ionized and Molecular Hydrogen in the Starburst Galaxy NGC 253
Near-infrared H2 1-0 5(1) and Brγ velocity curves along the major axis of NGC 253 have revealed a central velocity gradient that is 7 times steeper than that...
The Large Magellanic Cloud as a laboratory for hot bottom burning in massive asymptotic giant branch stars
We use Spitzer observations of the rich population of asymptotic giant branch (AGB) stars in the Large Magellanic Cloud (LMC) to test models describing the...
The little-studied cluster Berkeley 90. I. LS III +46 11: a very massive O3.5 If* + O3.5 If* binary
Context. It appears that most (if not all) massive stars are born in multiple systems. At the same time, the most massive binaries are hard to find owing to...
The little-studied cluster Berkeley 90. II. The foreground ISM
Context. Nearly one century after their discovery, the carrier or carriers of diffuse interstellar bands (DIBs) is/are still unknown and there are few...
The long bar as seen by the VVV Survey. II. Star counts
Context. There is still some debate about the presence and the morphological properties of the long bar in the inner Galaxy. Aims: We investigate the...
Aims: Two-dimensional spectroscopic data for the whole extent of the NGC 3132 planetary nebula have been obtained. We deliver a reduced data-cube and high...
The NOEMA observations of GN-z11: constraining the neutral interstellar medium and dust formation in the heart of cosmic reionization at z = 10.6
We present results of dust continuum and [C II]$\, 158\, {\rm \mu m}$ emission line observations of a remarkably UV luminous (M UV = -21.6) galaxy at z = 10.603...
The physics of the HII regions: the photoionization equilibrium in the HII regions of M51
A general overview of the physical properties of the HII regions is presented here, emphasizing the various general models made to explain their structure and...