Current scientific cosmology hosts a plurality of scenarios that articulate in different ways the precision astronomy's observations. However, this palette of...
Population of red supergiants in dwarf irregular galaxies
The identification and investigation of red supergiants (RSGs) in the Local Group and beyond are extremely important for understanding massive star evolution...
We will start by recalling the effects of rotation on stellar evolution and briefly explain its implementation in a stellar evolution code. We will present a...
Possible photometric signatures of moderately advanced civilizations: The Clarke exobelt
This paper puts forward a possible new indicator for the presence of moderately advanced civilizations on transiting exoplanets. The idea is to examine the...
Precipitable water vapour at the Roque de los Muchachos Observatory from GPS measurements
There are many parameters accounting for the quality of an astronomical site, namely seeing, cloud cover, ground winds, high-altitude winds, etc. The water...
Primitive materials preserved in meteorites and comets: clues on the stellar sources producing short-lived nuclides and presolar grains
Short-lived nuclides (SLNs) were incorporated to the solar nebula at the time of condensation of the first minerals from the vapor phase. The study of the...
Luminous high-redshift radio galaxies (HzRGs) are associated with the most massive known galaxies in the early Universe. These galaxies have the properties...
The presence of Dark Matter (DM) is required in the universe regulated by the standard general relativistic theory of gravitation. The nature of DM is however...
Problems with the dark matter and dark energy hypotheses, and alternative ideas
Two exotic elements have been introduced into the standard cosmological model: non-baryonic dark matter and dark energy. The success in converting a hypothesis...