News type: Research news

  • News
    The double-degenerate, super-Chandrasekhar nucleus of the planetary nebula Henize 2–428.
    The planetary nebula (PN) stage is the ultimate fate of stars with mass 1 to 8 solar masses (M⊙). The origin of their complex morphologies is poorly understood...
  • News
    The early sequence of events that shaped the Milky Way
    Among the myriad discoveries presented in the second data release of the Gaia mission, there was an enigmatic color-magnitude diagram (CMD) of Milky Way halo...
  • News
    The effect of magnetic fields on solar abundance determinations.
    In a recently published differential analysis (see ApJ, 724, 1536, Dec. 1 issue) , we have derived abundance corrections for iron lines, using synthetic spectra...
  • News
    The excitation of solar-like oscillations in a delta Scuti star by efficient envelope convection.
    Delta Scuti (δ Sct) stars are opacity-driven pulsators with masses of 1.5-2.5M⊙, their pulsations resulting from the varying ionization of helium. In less...
  • News
    The extreme CNO-enhanced composition of a primitive iron-poor dwarf star
    We present an analysis of high-resolution Keck/HIRES spectroscopic observations of J0815+4729, an extremely carbon-enhanced, iron-poor dwarf star. These high...
  • News
    The Fast Spiral-in of the companion star to the black hole XTE J1118+480.
    We report the detection of an orbital period decay of (dP/dt)= -1.83+-0.66 ms yr–1  in the black hole X-ray binary XTE J1118+480. This corresponds to a period...
  • News
    The filling factor - radius relation for 58 HII regions across the disk of NGC6946.
    Using the OSIRIS tunable narrow band imager on the 10.4m GTC (La Palma) we have mapped the SAB(rs)cd galaxy NGC 6946 over a 7.3x7.5 square arcminutes field in...
  • News
    The first post-Kepler brightness dips of KIC 8462852
    We present a photometric detection of the first brightness dips of the unique variable star KIC 8462852 since the end of the Kepler space mission in 2013 May...
  • News
    THE FULLERENES AND THE INTERSTELLAR DIFUSE 4430 BAND.
    Utilizando modelos semiempíricos de los espectros de fotoabsorción de varios fullerenos individuales (C_80, C_240, C_320 y C_540) predecimos transiciones en la...