Vai al contenuto principale

titolo
Avviso di Seminario
target
totem,dipartimento,ppim
inizio
Lunedì 02 Marzo 2020 14:00
luogo
Sala riunioni III piano edificio di via Pascoli
relatore
Prof. Rodolfo Angeloni Instituto de Investigacio'n Multidisciplinar en Ciencia y Tecnologi'a & Departamento de Fi'sica y Astronomi'a Universidad de La Serena (Cile)
titoloevento
RAMSES II - RAMAN Search for Extragalactic Symbiotic Stars: project concept, commissioning, and early results from the science verification phase
abstract
Symbiotic stars (SySts) are long-period interacting binaries composed of a hot compact star, an evolved giant star, and a tangled network of gas and dust nebulae. They represent unique laboratories for studying a variety of important astrophysical problems, and have also been proposed as likely progenitors of SNIa.

Presently, we know 276 SySts in the Milky Way and 74 in external galaxies. However, these numbers are still in striking contrast with the predicted population of SySts in our Galaxy. Because of other astrophysical sources that mimic SySt colors, no photometric diagnostic tool has so far demonstrated the power to unambiguously identify a SySt, thus making the recourse to costly spectroscopic follow-up still inescapable.
docsrefs
,1972,
Vai a inizio pagina
Sommario