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11. 12. 2017: Predavanje dr. Kelly Hambleton na Ponedeljkovem kolokviju

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Vabljeni v ponedeljek, 11. decembra 2017, ob 16:15 v predavalnico F1, FMF UL, Jadranska 19, Ljubljana, kjer bo na Ponedeljkovem fizikalnem kolokviju dr. Kelly Hambleton (Department of Astrophysics and Planetary Science, Univerza v Villanovi, ZDA) imela predavanje z naslovom "The Asteroseismology of Pulsating Stars in Binary Systems".  Vljudno vabljeni!

The Asteroseismology of Pulsating Stars in Binary Systems

dr. Kelly Hambleton
Department of Astrophysics and Planetary Science, Villanova University

The field of asteroseismology is advancing at an astounding rate, thanks to precise photometry from satellites such as Kepler and CoRoT. For many stars it is now possible to obtain fundamental stellar masses and radii along with rotational profiles and ages based primarily on empirical formulæ. In complement, the field of binary star physics has long been viewed as the cornerstone of astrophysics, providing direct measurements of fundamental stellar parameters and giving insight into the evolution of stars. In this talk we examine what happens when you combine these two diverse fields. Specifically, we discuss the presence of pulsating components in eccentric binary stars, also known as heartbeat stars. In approximately 20% of all known heartbeat stars we have identified pulsations driven by the orbital motions of the stars: tidally excited pulsations. We further showcase a selection of objects with tidally excited pulsations and demonstrate how, when near resonance, tidally excited pulsations can alter the evolution of the binary star orbit.


Pred predavanjem so vsi poslušalci vabljeni na čaj.

 

 

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