Journal: Astronomy and Astrophysics

  • Publication
    Technetium-rich M stars: Prime diagnostics of recent third dredge-up events on the asymptotic giant branch
    Context. Technetium (Tc)-rich M stars have been known for more than 45 years. However, the origin of Tc in these stars, particularly its detection without the...
  • Publication
    TEE, an estimator for the precision of eclipse and transit minimum times
    Context. Transit or eclipse timing variations have proven to be a valuable tool in exoplanet research. However, no simple way to estimate the potential...
  • Publication
    Teegarden's Star revisited. A nearby planetary system with at least three planets
    The two known planets in the planetary system of Teegarden's Star are among the most Earth-like exoplanets currently known. Revisiting this nearby planetary...
  • Publication
    Temperature constraints on the coldest brown dwarf known: WISE 0855-0714
    Context. Nearby isolated planetary mass objects are beginning to be discovered, but their individual properties are poorly constrained because their low surface...
  • Publication
    Temperature fluctuations in H II regions: Ionization by cosmic rays as a key mechanism
    We present a detailed model capable of explaining quantitatively the temperature fluctuations observed in luminous, large H II regions. The model is based on...
  • Publication
    Temporal albedo variability in the phase curve of KELT-1b
    The dayside brightness spectrum of a highly irradiated transiting brown dwarf KELT-1b is challenging to explain based on current brown dwarf atmosphere models...
  • Publication
    Temporal changes of the flare activity of Proxima Centauri
    Context. We study temporal variations of the emission lines of Hα, Hɛ, H and K CaII, D1 and D2 NaI, He4026, and He5876 in the HARPS spectra of Proxima Centauri...
  • Publication
    Temporal characteristics of solar p-modes.
    A method for ``time/frequency'' analysis is shortly described, with a discussion of its limitations in time and frequency resolution, and in sensitivity to...
  • Publication
    Temporal evolution of arch filaments as seen in He I 10 830 Å
    Aims: We study the evolution of an arch filament system (AFS) and of its individual arch filaments to learn about the processes occurring in them. Methods: We...