Journal: Astronomy and Astrophysics

  • Publication
    The 2009 multiwavelength campaign on Mrk 421: Variability and correlation studies
    Aims: We perform an extensive characterization of the broadband emission of Mrk 421, as well as its temporal evolution, during the non-flaring (low) state. The...
  • Publication
    The 6Li/7Li isotopic ratio in the metal-poor binary CS22876-032
    Aims: We present high-resolution and high-quality UVES spectroscopic data of the metal-poor double-lined spectroscopic binary CS 22876-032 ([Fe/H] approximately...
  • Publication
    The 700 ks Chandra Spiderweb Field. I. Evidence for widespread nuclear activity in the protocluster
    Aims: We present an analysis of the 700 ks Chandra ACIS-S observation of the field around the radio galaxy J1140-2629 (the Spiderweb Galaxy) at z = 2.156...
  • Publication
    The 700 ks Chandra Spiderweb Field. II. Evidence for inverse-Compton and thermal diffuse emission in the Spiderweb galaxy
    Aims: We present the X-ray imaging and spectral analysis of the diffuse emission around the radio galaxy J1140-2629 (the Spiderweb galaxy) at z = 2.16 and of...
  • Publication
    The <SUP>12</SUP>C/<SUP>13</SUP>C isotopic ratio at the dawn of chemical evolution
    Context. The known mega metal-poor (MMP) and hyper metal-poor (HMP) stars, with [Fe/H] < −6.0 and < −5.0, respectively, likely belong to the CEMP-no class...
  • Publication
    The abundance of clustered primordial black holes from quasar microlensing
    While elementary particles are the favored candidate for the elusive dark matter, primordial black holes (PBHs) have also been considered to fill that role...
  • Publication
    The abundances of O, S, Cl, N, Ar, He and C in seven Galactic H bt II regions regions
    An analysis of CCD spectra in the range lambda lambda4200 -8775, obtained at several positions of seven bright Galactic H Ii regions, with galactocentric...
  • Publication
    The ACS survey of Galactic globular clusters. XII. Photometric binaries along the main sequence
    Context. The fraction of binary stars is an important ingredient to interpret globular cluster dynamical evolution and their stellar population. Aims: We...
  • Publication
    The active centaur 2020 MK<SUB>4</SUB>
    Context. Centaurs go around the Sun between the orbits of Jupiter and Neptune. Only a fraction of the known centaurs have been found to display comet-like...