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...
Theoretical Modeling of Propagation of Magnetoacoustic Waves in Magnetic Regions Below Sunspots
We use two-dimensional numerical simulations and eikonal approximation to study properties of magnetohydrodynamic (MHD) waves traveling below the solar surface...
Theory and Modeling of the Zeeman and Paschen-Back Effects in Molecular Lines
This paper describes a very general approach to the calculation of the Zeeman splitting effect produced by an external magnetic field on the rotational levels...