News type: Research news

  • News
    The distribucion of electron densiy in the HII regions of the galaxies M51 and NGC 4449
    Using images of the Advanced Camera for Surveys" of the Hubble SpaceTelescope we have analyzed the global physical parameters of thepopulations of HII regions...
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    The distribution of gas and star formation in M 81.
    In this work we present the first complete CO J=3-2 map of M 81, observed as part of the Nearby Galaxies Legacy Survey. M 81 is a nearby spiral galaxy (3.64 Mpc...
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    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...
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    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...
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    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...
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    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...
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    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...
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    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...
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    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...