[seminar] (10.5.2018, 11:00, F-201) Astrophysics of Cepheids

[Mihael Makek]

Poštovane kolegice i kolege,

zadovoljstvo mi je pozvati Vas na seminar koji će održati dr. Bogumil
Pilecki (Nicolaus Copernicus Astronomical Center, Varšava) po nazivom:

Astrophysics of Cepheids: results from the analysis of Cepheids in
eclipsing binary systems

Mjesto: Fizički odsjek, F-201
Vrijeme: četvrtak, 10. 5. 2018. u 11 sati

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Dear colleagues,

I am happy to invite you to the seminar by dr. Bogumil Pilecki from
Nicolaus Copernicus Astronomical Center, Warsaw. The title of the talk is:

Astrophysics of Cepheids: results from the analysis of Cepheids in
 eclipsing binary systems

Location: Department of Physics, F-201
Time: 11:00 on Thursday, May 10th, 2018


----SEMINAR ABSTRACT--------------------------------------------------

Cepheids are important distance indicators in the local Universe and key 
objects for testing the predictions of stellar evolution and stellar 
pulsation theories. A presence of Cepheids in eclipsing binary systems
give us an opportunity to measure and study their physical parameters,
including the mass. The analysis of such systems is very challenging and
new methods had to be developed to take full advantage of this
configuration. In total, we have studied seven Cepheids in six eclipsing
binary systems and found firm relations between such observed parameters
as period mass and radius. The results based on evolution and pulsation
models can be now compared with observations and challenged. The study
resulted in finding evidence for binary interactions during the evolution
and a non-pulsating object inside the instability strip. Our measurements
provide strong constraints for solving the famous Cepheid mass discrepancy
problem.


Srdačno,
Mihael Makek