Journal: Astronomy and Astrophysics

  • Publication
    High zenith angle observations of PKS 2155-304 with the MAGIC-I telescope
    Context. The high frequency peaked BL Lac PKS 2155-304 with a redshift of z = 0.116 was discovered in 1997 in the very high energy (VHE, E > 100 GeV) γ-ray...
  • Publication
    High-contrast optical imaging of companions: the case of the brown dwarf binary HD 130948 BC
    Context. High-contrast imaging at optical wavelengths is limited by the modest correction of conventional near-IR optimized AO systems. We take advantage of new...
  • Publication
    High-frequency waves in the corona due to null points
    This work aims to understand the behavior of non-linear waves in the vicinity of a coronal null point. In previous works we have shown that high-frequency waves...
  • Publication
    High-precision acoustic helium signatures in 18 low-mass low-luminosity red giants. Analysis from more than four years of Kepler observations
    Context. High-precision frequencies of acoustic modes in red giant stars are now available thanks to the long observing length and high quality of the light...
  • Publication
    High-resolution Hα imaging of the northern Galactic plane and the IGAPS image database
    The INT Galactic Plane Survey (IGAPS) is the merger of the optical photometric surveys IPHAS and UVEX based on data from the Isaac Newton Telescope (INT)...
  • Publication
    High-resolution imaging and near-infrared spectroscopy of penumbral decay
    Aims: Combining high-resolution spectropolarimetric and imaging data is key to understanding the decay process of sunspots as it allows us to scrutinize the...
  • Publication
    High-resolution infrared spectroscopy as a tool to detect false positives of transit search programs
    Context. Transit search programs such as CoRoT and Kepler now have the capability of detecting planets as small as the Earth. The detection of these planets...
  • Publication
    High-resolution observations of recurrent jets from an arch filament system
    Context. Solar jets are collimated plasma ejections along magnetic field lines observed in hot (extreme-ultraviolet (EUV) jets) and cool (chromospheric surges)...
  • Publication
    High-resolution spectroscopic study of massive blue and red supergiants in Perseus OB1. I. Definition of the sample, membership, and kinematics
    Context. The Perseus OB1 association, including the h and χ Persei double cluster, is an interesting laboratory for the investigation of massive star evolution...