Journal: Astronomy and Astrophysics

  • Publication
    The ^12^CH^+^/^13^CH^+^ ratio in the Coalsack.
    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^)...
  • Publication
    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...
  • Publication
    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...
  • Publication
    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...
  • Publication
    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...
  • Publication
    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...
  • Publication
    Thermal properties of magnetic flux tubes. I. Solution of the diffusion problem
    The heat flow and temperature structure within and surrounding a magnetic flux tube stored in mechanical equilibrium in a stellar convection zone are considered...
  • Publication
    Thermal properties of slowly rotating asteroids: results from a targeted survey
    Context. Earlier work suggests that slowly rotating asteroids should have higher thermal inertias than faster rotators because the heat wave penetrates deeper...
  • Publication
    Thermal-magnetic relation in a sunspot and a map of its Wilson depression
    We present relations between thermal and magnetic quantities in a simple, isolated sunspot, as deduced from the inversion of 1.56 μm spectropolarimetric data...