Classical Cepheids as distance indicators

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ll giorno giovedì 15 Aprile 2021 alle ore 14.00, sulla piattaforma Zoom (apertura 13:50),
 
la Professoressa Marcella Marconi, direttrice dell'Osservatorio Astronomico di Capodimonte, terrà un Colloquium intitolato:
 
"Classical Cepheids as distance indicators: from the Milky Way to the Hubble constant"
 
 
ABSTRACT
One of the most debated issues of modern astrophysics is the calibration of the cosmic distance scale based on Classical Cepheids, a well-known class of pulsating variable stars currently adopted as distance indicators and stellar population tracers. Indeed the Hubble constant obtained from the extragalactic distance scale calibrated with Classical Cepheids Period-Luminosity and Period-Luminosity-Color relations deviates at the 4-6 sigma level from predictions based on the Early Universe (Cosmic Microwave Background measurements + LCDM cosmological model). The most recent results on the calibration of the extragalactic distance scale will be discussed in the context of present and future space missions and ground-based next generation telescopes, as well as of most recent theoretical developments in the field of stellar pulsation.
 
 
 
Meeting ID: 992 230 3133    |    Passcode: ssm_zoom    |   Alternative passcode: 59529651
 
 
In caso di necessità, contattare gli organizzatori micol.benetti@unina.it e marco.coraggio@unina.it
Data: 15/04/2021