News
Black-hole-regulated star formation in massive galaxies
The centres of massive galaxies are among the most exotic regions in the Universe. They harbour supermassive black holes, with masses of at least one million...
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NewsCalibrating the Rossby number, a key parameter to study the magnetic activity of starsIn a star like the Sun, surface magnetic activity results from the interaction between rotation, convection, and magnetic field. One of the key parameters to...
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NewsCarbon and oxygen gradient values in recombination lines in HII regionsThe galactic gradient of C has been determined for the first time using recombination lines in HII regions. Results from these lines are more reliable than...
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NewsCARMENES finds a nearby Neptune in the temperate zone of an early-M dwarfWe report on the first star discovered to host a planet detected by radial velocity (RV) observations obtained within the CARMENES survey for exoplanets around...
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NewsChallenging the theoretically predicted mass-loss rate increase of blue supergiants in the bi-stability region of the stellar windsThe properties of blue supergiants are key for constraining the end of the main sequence phase, a phase during which massive stars spend most of their lifetimes...
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NewsCharacterization of the host galaxy from gamma-ray blazarsThe most extreme electromagnetic radiation that can be observed is known as very high energy gamma rays (VHE, E>100 GeV). It is the last window open to the...
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NewsChromospheric polarization in the photospheric solar oxygen infrared triplet.We present multilevel radiative transfer modeling of the scattering polarization observed in the solar O I infrared triplet around 777 nm. We demonstrate that...
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NewsCircumstellar effects on the Rubidium abundances in massive AGB stars.Intermediate mass stars, in their last phases of evolution ("AGB stars"),produce a large number of heavy elements (rich in neutrons), some ofthem radioactive...
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NewsCollision of C-type Ryugu’s parent body with a rocky objectHayabusa2’s optical navigation camera (ONC) found many anomalously bright boulders on the dark surface of the carbonaceous (or C-type) asteroid Ryugu...