Astrofísicas: Técnicas

  • Publicación
    An automated system to classify stellar spectra - I
    Analyses of stellar spectra often begin with the determination of a number of parameters that define a model atmosphere. This work presents a prototype for an...
  • Publicación
    An eclipsing double-line spectroscopic binary at the stellar/substellar boundary in the Upper Scorpius OB association
    Aims: We aim at constraining evolutionary models at low mass and young ages by identifying interesting transiting system members of the nearest OB association...
  • Publicación
    An effective temperature calibration for solar type stars using equivalent width ratios. A fast and easy spectroscopic temperature estimation
    Aims: Precise determination of the stellar effective temperature of solar type stars is extremely important for astrophysics. We present an effective...
  • Publicación
    An empirical spectral library of chemically well characterized stars for stellar population modelling
    With the goal of assembling a new generation of more realistic single stellar population (SSP) models, we have obtained magnesium abundances for nearly 80% of...
  • Publicación
    An enhanced slope in the transmission spectrum of the hot Jupiter WASP-104b
    We present the optical transmission spectrum of the hot Jupiter WASP-104b based on one transit observed by the blue and red channels of the Double Spectrograph...
  • Publicación
    An ESPRESSO view of the HD 189733 system. Broadband transmission spectrum, differential rotation, and system architecture
    Context. The development of state-of-the-art spectrographs has ushered in a new era in the detection and characterization of exoplanetary systems. The...
  • Publicación
    An extensive spectroscopic time series of three Wolf-Rayet stars - I. The lifetime of large-scale structures in the wind of WR 134
    During the summer of 2013, a 4-month spectroscopic campaign took place to observe the variabilities in three Wolf-Rayet stars. The spectroscopic data have been...
  • Publicación
    An image of the dust sublimation region in the nucleus of NGC 1068
    We present near-infrared interferometric data on the Seyfert 2 galaxy NGC 1068, obtained with the GRAVITY instrument on the European Southern Observatory Very...
  • Publicación
    An impressionist view of V Hydrae. When MATISSE paints asymmetric giant blobs
    Context. Asymptotic giant branch (AGB) stars enrich the interstellar medium through their mass loss. The mechanism(s) shaping the circumstellar environment of...