Seminars

Giulia De Somma 

(Capodimonte)

9 January 2025, 11:30, Aula Jappelli 

Updating Stellar Pulsation Models to Pave the Road for the Forthcoming Observational Framework

Pulsating stars play a crucial role in calibrating the cosmic distance ladder and tracing stellar populations due to their predictable variability and well-established relations with intrinsic properties such as luminosity and mass.

This seminar focuses on recent advancements in the development of a comprehensive set of nonlinear, convective pulsation models for Classical Cepheids. These models, built using the Stellingwerf hydrodynamical code, provide accurate predictions of key observable quantities, including instability strips, multi-filter light curves, mean magnitudes, and colors.

This updated pulsation framework has led to the derivation of new, theoretical, metal-dependent Period-Luminosity-Color and Period-Wesenheit relations in various photometric passbands. By combining these pulsation models with updated stellar evolutionary tracks from the BASTI database, refined, metal-dependent Period-Age and Period-Age-Color relations have been developed. These relations have been applied to Gaia Early Data Release 3 Galactic Cepheids to investigate their age distributions.

The seminar also introduces the SPECTRUM project which aims to refine theoretical models of variable stars to establish a self-consistent evolutionary and pulsational framework. The presentation includes the first results of this project and a discussion of ongoing work, highlighting its potential to advance the understanding of pulsating stars.

Join Zoom Meeting

https://unipd.zoom.us/j/85273198731?pwd=V1ZiNE9ZWUN4ZTdIUzJsTFo0Z3U2Zz09

Meeting ID: 852 7319 8731

Passcode: 208186

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Next scheduled seminars:

January 23th - Emiliano Merlin

January 30th - Matteo Imbrogo

February 20th - Fatemeh Zahra Majidi

and many more! 

HIGH-PROFILE Colloquia: 

December 12th - Thomas BENSBY (University of Lunds) 

January 16th - Adriano FONTANA (INAF) 

February 13th - Claudia CICONE (University of Oslo) 

March 13th - Sara ELLISON (University of Victoria) 

CONTAMINATION Seminars: 

February 6th - Samuele NEGRO (Neurobiologia - UNIPD) 

March 27th - Giacomo DE ANGELIS (INFN) 

April 17th - Federica Cacciatore (ISPRA)