Abstract
The wealth of astrophysical data available has permitted accurate investigations of the interior of many stars, showing that the currently available stellar evolution models are lacking. One of the major problems is the treatment of rotation of stellar interiors, and the associated transport of chemicals and angular momentum in the structure. Observations show that these effects are more effective than predicted, resulting in simulated stars rotating faster than observed. The correct treatment of these effects is also important to study the elements brought to the surface and dispersed in the environment by the stellar winds, crucial to correctly assess the role of stars in the galactic ecology. A few physical processes have been proposed as candidate solutions, but the calibration of these effects is missing. The CROW project will explore these questions providing fundamental insights on the physics of stars and new paradigms for stellar evolution. In its timeline, the project will focus on the low and intermediate mass stars (M<8-9Msun, LIMS), representing the bulk of the stars in the universe, both in the field and in star clusters. Thanks to the peculiar physical processes involved in their evolution, the complex network of nuclear reactions and nucleosynthesis happening in their cores, LIMS are important in many fields of astrophysics. This importance is assessed via the comparison of carefully constructed models with data. CROW will use state of the art software to produce updated stellar models and then compare them with the currently available dataset, with the aim to calibrate the physical processes responsible for the internal rotation of stars. Attention will be given to both late and early evolutionary stages, exploring the most complex aspect of their physical evolution, like the impact rotation and chemical transport has on asteroseismic predictions (useful for PLATO) or the impact stellar winds of late stages have on the stellar environment.
Dettagli del progetto
Responsabile scientifico: Marco Tailo
Strutture Unibo coinvolte:
Dipartimento di Fisica e Astronomia "Augusto Righi"
Coordinatore:
ALMA MATER STUDIORUM - Università di Bologna(Italy)
Costo totale di progetto: Euro (EUR) 249.900,00
Contributo totale di progetto: Euro (EUR) 249.900,00
Costo totale Unibo: Euro (EUR) 249.900,00
Contributo totale Unibo: Euro (EUR) 249.900,00
Durata del progetto in mesi: 36
Data di inizio
29/05/2025
Data di fine:
28/05/2028
