Journal: Astronomy and Astrophysics

  • Publication
    Higher depletion of lithium in planet host stars: no age and mass effect
    Recent observational work by Israelian et al. has shown that sun-like planet host stars in the temperature range 700 K Teff 5850 K have lithium abundances...
  • Publication
    Hint of an exocomet transit in the CHEOPS light curve of HD 172555
    HD 172555 is a young (~20 Myr) A7V star surrounded by a 10 au wide debris disk suspected to be replenished partly by collisions between large planetesimals...
  • Publication
    Hints of a close outer companion to the ultra-hot Jupiter TOI-2109 b
    Context. Hot Jupiters (HJs) with close-by planetary companions are rare, with only a handful of them having been discovered so far. This could be due to their...
  • Publication
    Hints of auroral and magnetospheric polarized radio emission from the scallop-shell star 2MASS J05082729–2101444
    Scallop-shell stars, a recently discovered class of young M dwarfs, show complex optical light curves that are characterized by periodic dips as well as other...
  • Publication
    HIP 41378 observed by CHEOPS: Where is planet d?
    HIP 41378 d is a long-period planet that has only been observed to transit twice, three years apart, with K2. According to stability considerations and a...
  • Publication
    Homogeneity in the early chemical evolution of the Sextans dwarf spheroidal galaxy
    We present the high-resolution spectroscopic analysis of two new extremely metal-poor star (EMPS) candidates in the dwarf spheroidal galaxy Sextans. These...
  • Publication
    Homogeneous analysis of globular clusters from the APOGEE survey with the BACCHUS code. I. The northern clusters
    Aims: We seek to provide abundances of a large set of light and neutron-capture elements homogeneously analyzed that cover a wide range of metallicity to...
  • Publication
    Homogeneous spectroscopic parameters for bright planet host stars from the northern hemisphere . The impact on stellar and planetary mass
    Aims: In this work we derive new precise and homogeneous parameters for 37 stars with planets. For this purpose, we analyze high resolution spectra obtained by...
  • Publication
    Horizontal branch morphology: A new photometric parametrization
    Context. Theory and observations indicate that the distribution of stars along the horizontal branch of Galactic globular clusters mainly depends on the metal...