Journal: Astronomy and Astrophysics

  • 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...
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    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...
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    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...
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    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...
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    The activity of comet C/2007 D1 (LINEAR) at 9.7 AU from the Sun
    Aims: We report on the unusual distant activity of the dynamically new comet C/2007 D1 (LINEAR), observed at rh = 9.7 AU post-perihelion. This comet is...
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    The activity of comet C/2007 D1 (LINEAR) at 9.7 AU from the Sun (Corrigendum)
    Based on observations collected at the Italian Telescopio Nazionale Galileo (TNG), operated on the island of La Palma by the Centro Galileo Galilei of the INAF...
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    The age of extremely red and massive galaxies at very high redshift
    Aims: We present a determination of the intrinsic colors and ages of galaxies at very high redshift, in particular old galaxies (OGs) within extremely red...
  • Publication
    The age-mass relation for chromospherically active binaries. II. Lithium depletion in dwarf components.
    We present an extensive study of lithium abundances in dwarf components of chromospherically active binary stars (CABS). Since most of these binaries have known...