We study the behaviour of the interstellar R_n_=n(Zn^+^)/n(Na^0^) ratio in ionization equilibrium conditions. The ratio is very sensitive to variations of the...
The [CII] 158 μm emission line as a gas mass tracer in high redshift quiescent galaxies
A great deal of effort has been made in recent years to probe the gas fraction evolution of massive quiescent galaxies (QGs); however, a clear picture has not...
We have measured the ^12^C/^13^C interstellar ratio in the Coalsack, a prominent dark nebula in the southern sky, by means of high resolution (λ/δλ=6x10^4^)...
The γ Doradus CoRoT target HD 49434. I. Results from the ground-based campaign
Context: We present an extensive ground-based photometric and spectroscopic campaign of the γ Dor CoRoT target HD 49434. This campaign was a preparatory step of...
The γ Doradus CoRoT target HD 49434. II. Frequency analysis of the CoRoT data
Context. HD 49434 is a bright (V = 5.75 m) and multiperiodic γ Dor-type pulsator that has been selected for the asteroseismic core programme of the CoRoT...
The δ Scuti pulsations of β Pictoris as observed by ASTEP from Antarctica
Aims: The Antarctica Search for Transiting Extrasolar Planets (ASTEP), an automatized 400 mm telescope located at Concordia station in Antarctica, monitored β...
The ‘Almogaren’ of Risco Caído: a singular astronomical sanctuary of the ancient Canarians
The almogaren (rock-cut sanctuary) of Risco Caído was discovered in 1996 in the Canary island of Gran Canaria. It is a paradigmatic example of a complex where...
Theoretical amplitudes and lifetimes of non-radial solar-like oscillations in red giants
Context: Solar-like oscillations have been observed in numerous red giants from ground and from space. An important question arises: could we expect to detect...
Theoretical formulation of Doppler redistribution in scattering polarization within the framework of the velocity-space density matrix formalism
Within the framework of the density matrix theory for the generation and transfer of polarized radiation, velocity density matrix correlations represent an...