At the end of their evolution, stars with a final mass larger than 8 solar masses (“final mass” because massive stars lose a large fraction of their mass as stellar winds during their evolution) explode as Core-Collapse Supernovae, e.g. triggered by the collapse of their nucleus. Two objects are produced by such explosions: the supernova remnant formed by the ejected» Read more
Palermo Astronomical Observatory “Giuseppe S. Vaiana” is one of the research centres of the National Institute for Astrophysics (INAF). It works together with Palermo University through the Department of Physics and Chemistry.
OAPa’s main characteristic is its specific vocation in the field of space astrophysics. The network of activities also involves several frontier research fields both at the national and international level.
TESS finds an exoplanets around a 40 million years old star. The study: “A possibly inflated planet around the bright young star DS Tucanae A” of S. Benatti (INAF-OAPA/INAF-Padova) recently appeared on A&A
The final architecture of a planetary system is the result of a complex interplay between several processes, such as the dispersion of the protoplanetary disk from which the planetary system formed, and the gravitational interaction between the newborn planets. Besides, these processes can be affected by the environment and by their central star. One of the most important process dictating» Read more
Heating and emission in the accreting material onto young stars. The study: “Effects of radiation in accretion regions of classical T Tauri stars. Pre-heating of accretion column in non-LTE regime” of S. Colombo (UNIPA/OAPA/LERMA) recently appeared on A&A
Pre-Main Sequence stars are young (few million years) stars whose nuclei are not powered yet by the thermonuclear reactions, and that may still accrete gas from a surrounding disk (called protoplanetary or accretion disks). Even if the accretion disks are typically extended more than 100 Astronomical Units (AU, the mean distance between Earth and the Sun, equal to 150 million» Read more