Astrophysical: Methods

  • Publication
    Time Delay in QSO 0957+561 From 1984-1999 Optical Data
    Photometric optical data of QSO 0957+561 covering the period 1984-1999 are analyzed to discern between the two values of the time delay (417 and 424 days)...
  • Publication
    Time Series Analysis of Long Term Full Disk Observations Of The Mn I 539.4 nm Solar Line
    The equivalent width and central depth data of Mn 539.4 nm solar spectral line, observed in the period from 1979 to 1992 at Kitt Peak Observatory, was analyzed...
  • Publication
    TMCalc - a fast code to derive Teff and [Fe/H] for FGK stars
    We present a new direct spectroscopic calibration for a fast estimation of the stellar metallicity [Fe/H]. This calibration was computed using a large sample of...
  • Publication
    TOI-1442 b and TOI-2445 b: Two potentially rocky ultra-short period planets around M dwarfs
    Context. Exoplanets with orbital periods of less than one day are known as ultra-short period (USP) planets. They are relatively rare products of planetary...
  • Publication
    TOI-2266 b: A keystone super-Earth at the edge of the M dwarf radius valley
    We validate the Transiting Exoplanet Survey Satellite (TESS) object of interest TOI-2266.01 (TIC 8348911) as a small transiting planet (most likely a super...
  • Publication
    TOI-519 b: A short-period substellar object around an M dwarf validated using multicolour photometry and phase curve analysis
    Context. We report the discovery of TOI-519 b (TIC 218795833), a transiting substellar object (R = 1.07 R Jup) orbiting a faint M dwarf (V = 17.35) on a 1.26 d...
  • Publication
    TOI-5678b: A 48-day transiting Neptune-mass planet characterized with CHEOPS and HARPS★
    Context. A large sample of long-period giant planets has been discovered thanks to long-term radial velocity surveys, but only a few dozen of these planets have...
  • Publication
    Towards a more complete sample of binary central stars of planetary nebulae with Gaia
    Context. Many if not most planetary nebulae (PNe) are now thought to be the outcome of binary evolutionary scenarios. However, only a few percent of the PNe in...
  • Publication
    Towards a new classification of galaxies: principal component analysis of CALIFA circular velocity curves
    We present a galaxy classification system for 238 (E1-Sdm) CALIFA (Calar Alto Legacy Integral Field Area) galaxies based on the shapes and amplitudes of their...