Journal: Astronomy and Astrophysics

  • Publication
    Lithium in ROSAT-discovered candidate members in the Alpha Persei cluster
    We present lithium observations of 23 X-ray selected candidate members of alpha Per, which are part of a larger sample of stars identified through two ROSAT...
  • Publication
    Lithium in stars with exoplanets
    We present a comparison of the lithium abundances of stars with and without planetary-mass companions. New lithium abundances are reported in 79 planet hosts...
  • Publication
    Lithium in the globular cluster NGC 6397. Evidence for dependence on evolutionary status
    Context: Most globular clusters are believed to host a single stellar population. They can thus be considered a good place to study the Spite plateau and to...
  • Publication
    Lithium in the Hyades L5 brown dwarf 2MASS J04183483+2131275
    Aims: From the luminosity, effective temperature and age of the Hyades brown dwarf 2MASS J04183483+2131275 (2M0418), substellar evolutionary models predict a...
  • Publication
    Long term photometric monitoring with the Mercator telescope. Frequencies and mode identification of variable O-B stars
    Aims: We selected a large sample of O-B stars that were considered as (candidate) slowly pulsating B, β Cep, and Maia stars after the analysis of their...
  • Publication
    Long-term evolution of three light bridges developed on the same sunspot
    One important feature of sunspots is the presence of light bridges. These structures are elongated and bright (as compared to the umbra) features that seem to...
  • Publication
    Long-term multi-wavelength study of 1ES 0647+250
    Context. The BL Lac object 1ES 0647+250 is one of the few distant γ-ray emitting blazars detected at very high energies (VHEs; ≳100 GeV) during a non-flaring...
  • Publication
    Long-term multi-wavelength variability and correlation study of Markarian 421 from 2007 to 2009
    Aims: We study the multi-band variability and correlations of the TeV blazar Mrk 421 on year timescales, which can bring additional insight on the processes...
  • Publication
    Long-term optical spectral monitoring of a changing-look active galactic nucleus NGC 3516. II. Broad-line profile variability
    Context. We analyze the broad Hβ line profile variability of a "changing look" active galactic nucleus (CL-AGN) NGC 3516 over an extensive period of 25 years...