Astrophysical: Techniques

  • Publication
    Global photometric properties of (162173) Ryugu
    Context. The Hayabusa2 spacecraft launched by Japan Aerospace Exploration Agency has been conducting observations of the asteroid (162173) Ryugu since June 2018...
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    Going back to basics: accelerating exoplanet transit modelling using Taylor-series expansion of the orbital motion
    A significant fraction of an exoplanet transit model evaluation time is spent calculating projected distances between the planet and its host star. This is a...
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    gr8stars – I. A homogeneous spectroscopic study of bright FGKM dwarfs and a public library of their high-resolution spectra
    As the fields of stellar and exoplanetary study grow and revolutionary new detection instruments are created, it is imperative that a homogeneous, precise...
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    Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry
    We present Gran Telescopio Canarias (GTC) optical transit narrowband photometry of the hot-Jupiter exoplanet XO-2b using the OSIRIS instrument. This unique...
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    Granulation in K-type dwarf stars. I. Spectroscopic observations
    Aims: We seek to detect and quantify the effects of surface convection (granulation) on the line spectra of K-dwarfs as a first step towards a rigorous testing...
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    Gray transits of WD 1145+017 over the visible band
    We have observed several relatively deep transits of the white dwarf WD 1145+017 with the Gran Telescopio Canarias (GTC) in the wavelength range 480 to 920 nm...
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    GRB 011121: A Collimated Outflow into Wind-blown Surroundings
    We report optical and near-infrared follow-up observations of GRB 011121 collected predominantly at ESO telescopes in Chile. We discover a break in the...
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    GRB 051028: an intrinsically faint gamma-ray burst at high redshift?
    Aims.We present multiwavelength observations of the gamma-ray burst GRB 051028 detected by HETE-2 in order to derive its afterglow emission parameters and to...
  • Publication
    Greening of the brown-dwarf desert. EPIC 212036875b: a 51 MJ object in a 5-day orbit around an F7 V star
    Context. Although more than 2000 brown dwarfs have been detected to date, mainly from direct imaging, their characterisation is difficult due to their faintness...