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...
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NewsThe 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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NewsThe 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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NewsThe extreme CNO-enhanced composition of a primitive iron-poor dwarf starWe 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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NewsThe 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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NewsThe 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...
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NewsThe first post-Kepler brightness dips of KIC 8462852We 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...
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NewsTHE 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...
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NewsThe GALEX/S4G UV-IR color-color diagram: catching Spiral Galaxies away from the Blue Sequence.We obtained GALEX FUV, NUV, and Spitzer/IRAC 3.6 µm photometry for >2000 galaxies, available for 90% of the S4G sample. We find a very tight "GALEX Blue...