Journal: Astronomy and Astrophysics

  • Publication
    The CARMENES search for exoplanets around M dwarfs. Two planets on opposite sides of the radius gap transiting the nearby M dwarf LTT 3780
    We present the discovery and characterisation of two transiting planets observed by the Transiting Exoplanet Survey Satellite (TESS) orbiting the nearby (d ⋆ ≈...
  • Publication
    The CARMENES search for exoplanets around M dwarfs. Two Saturn-mass planets orbiting active stars
    The CARMENES radial-velocity survey is currently searching for planets in a sample of 387 M dwarfs. Here we report on two Saturn-mass planets orbiting TYC 2187...
  • Publication
    The CARMENES search for exoplanets around M dwarfs. Two temperate Earth-mass planet candidates around Teegarden's Star
    Context. Teegarden's Star is the brightest and one of the nearest ultra-cool dwarfs in the solar neighbourhood. For its late spectral type (M7.0 V), the star...
  • Publication
    The CARMENES search for exoplanets around M dwarfs. Two terrestrial planets orbiting G 264-012 and one terrestrial planet orbiting Gl 393
    We report the discovery of two planetary systems, namely G 264-012, an M 4.0 dwarf with two terrestrial planets (M b sin i=2.50 −0.30 +0.29 M ⊕ and M c sin i=3...
  • Publication
    The CARMENES search for exoplanets around M dwarfs. Variability of the He I line at 10 830 Å
    The He I infrared (IR) triplet at 10 830 Å is known as an activity indicator in solar-type stars and has become a primary diagnostic in exoplanetary...
  • Publication
    The CARMENES search for exoplanets around M dwarfs. Variability on long timescales as seen in chromospheric indicators
    It is clearly established that the Sun has an 11-yr cycle that is caused by its internal magnetic field. Such a cycle is also observed in a sample of M dwarfs...
  • Publication
    The CARMENES search for exoplanets around M dwarfs. Wing asymmetries of Hα, Na I D, and He I lines
    Stellar activity is ubiquitously encountered in M dwarfs and often characterised by the Hα line. In the most active M dwarfs, Hα is found in emission, sometimes...
  • Publication
    The CARMENES search for exoplanets around M dwarfs. Wolf 1069 b: Earth-mass planet in the habitable zone of a nearby, very low-mass star
    We present the discovery of an Earth-mass planet (M b sin i = 1.26 ± 0.21 M ⊕) on a 15.6 d orbit of a relatively nearby (d ~ 9.6 pc) and low-mass (0.167 ± 0.011...
  • Publication
    The CARMENES search for exoplanets around M dwarfs: Magnesium and silicon abundances of K7–M5.5 stars
    We present the abundances of magnesium (Mg) and silicon (Si) for 314 dwarf stars with spectral types in the interval K7.0–M5.5 (T eff range ≈ 4200–3050 K)...