Aims. We aim to extend our current observational understanding of the integrated planet Earth spectropolarimetry from the optical to the near-infrared...
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NewsSimultaneous optical and near-infrared linear spectropolarimetry of the earthshine.
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NewsSmall Magnetic Loops Connecting the Quiet Surface and the Hot Outer Atmosphere of the Sun.
The quiet Sun (the 99%, or more, of the solar surface not covered by sunspots or active regions) is receiving increased attention in recent years; its role on...
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NewsSolving the enigma of the brightest planetary nebulae
Planetary nebulae (PNe) are the ejecta of evolved low-intermediate mass stars present in all stellar systems. Perhaps the easiest thing to do when studying PNe...
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NewsSolving the paradox of the enigmatic solar sodium D1 line polarization
In 1998 the journal Nature published a seminal letter concluding that the mysterious polarization (a particular property of light) that had been recently...
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NewsSpectroscopic follow-up of L- and T-type proper-motion member candidates in the Pleiades.
We report on the near-infrared low-resolution spectroscopy and red optical (Z-band) photometry of seven proper-motion, very low-mass substellar member...
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NewsSpiral-shaped wavefronts in a sunspot umbra
There are many oscillatory phenomena in the Sun which show up from the deepest interior layers to the outermost layers of its atmosphere. The study of these...
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NewsSpiral-shaped winds in old stars reveal presence of a partner
Towards the end of their lives some 95% of stars evolve into red giants which lose their mass via a “stellar wind”. Eventually they end up as planetary nebulae...
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NewsStar-forming galaxies in SDSS: signs of metallicity evolution.
La evolución de galaxias ha sido ampliamente estudiada a altosdesplazamientos al rojo, pero existen pocos estudios en este campo abajos desplazamientos al rojo...
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NewsStars rich in rubidium
It has been discovered that the most evolved intermediate-mass stars in our Galaxy are very rich in rubidium. This finding is the first observational evidence...