Journal: Astronomy and Astrophysics

  • Publication
    HD 51106 and HD 50747: an ellipsoidal binary and a triple system observed with CoRoT
    Context: We present an analysis of the observations of HD 51106 and HD 50747 by the satellite CoRoT, obtained during its initial run, and of the spectroscopic...
  • Publication
    He I λ 10 830 Å in the transmission spectrum of HD209458 b
    Context. Recently, the He I triplet at 10 830 Å was rediscovered as an excellent probe of the extended and possibly evaporating atmospheres of close-in...
  • Publication
    Heat transfer in sunspot penumbrae. Origin of dark-cored penumbral filaments
    Context: Observations at 0.1 arcsec have revealed the existence of dark cores in the bright filaments of sunspot penumbrae. Expectations are high that such dark...
  • Publication
    Height variation of the cutoff frequency in a sunspot umbra
    Context. In the solar atmosphere, the acoustic cutoff frequency is a local quantity that depends on atmospheric height. It separates low-frequency evanescent...
  • Publication
    Heights of formation for measurements of atmospheric parameters.
    We argue that heights of formation (HOFs) should not be assigned to spectral lines since a single line my sample very different layers of the atmosphere...
  • Publication
    Helioseismic evidence of two solar granulation timescales
    The signature of two different scales of solar granulation in the power spectrum of disk integrated irradiance time series is presented. The fitted timescales...
  • Publication
    Helioseismic holography of simulated sunspots: dependence of the travel time on magnetic field strength and Wilson depression
    Improving methods for determining the subsurface structure of sunspots from their seismic signature requires a better understanding of the interaction of waves...
  • Publication
    Hen 2-104: a close-up look at the Southern Crab
    Aims: The kinematics, shaping, density distribution, expansion distance, and ionized mass of the nebula Hen 2-104, and the nature of its symbiotic Mira are...
  • Publication
    HerMES: deep number counts at 250 μm, 350 μm and 500 μm in the COSMOS and GOODS-N fields and the build-up of the cosmic infrared background
    Aims: The Spectral and Photometric Imaging REceiver (SPIRE) onboard the Herschel space telescope has provided confusion limited maps of deep fields at 250 μm...