Galactic globular clusters have always been at the crossroad of several investigations in both Stellar and Galactic Astrophysics. For long time, they have been...
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CharlaGalactic Globular Clusters: Why should we care about them?
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CharlaGamma rays from Young Stellar Objects
In the last years star-forming regions and massive protostars have been suggested to be gamma-ray emitters. Isolated massive protostars present powerful...
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CharlaGlobular clusters systems and their host dark matter halos
In the Λ-CDM galaxy formation paradigm, the star formation history of a galaxy is coupled to the total mass of its dark matter halo through processes like...
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CharlaGRB 101225A: a stellar murder on Christmas Day
Long Gamma-Ray Bursts (GRBs) are the most dramatic examples of massive stellar deaths, usually associated with supernovae (Woosley et al. 2006). They release...
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CharlaGTC OSIRIS spectroscopy of a faint L subdwarf identified in UKIDSS
In this Breaking News seminar, I will describe our project dedicated to the search for ultracool low-metallicity dwarfs (or subdwarfs) in the large-scale...
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CharlaGTC OSIRIS z-band imaging of Y dwarfs
The stellar spectroscopic sequence has now been extended into very cool objects bridging the gap between low-mass stars and classical planets. Those objects...
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CharlaGTC/OSIRIS spectroscopic confirmation of the first L dwarf in Praesepe
Fundamental properties of brown dwarfs, such as luminosity and effective temperature, evolve with age. Large samples of spectroscopically-confirmed substellar...
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CharlaHertzsprung-Russell Diagram: from massive Wolf-Rayet stars to stripped helium stars
"Classical Wolf-Rayet (WR) stars" represent a class of hot, hydrogen-depleted stars wtih powerful stellar winds and are prominent progenitors of black holes...
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CharlaHot Bubbles in Nebulae around Evolved Stars: probing stellar evolution
In this talk we will present our most recent numerical and observational results on the formation, evolution, and X-ray emission from hot bubbles in nebulae...