Institute of Astronomy

The Newly Discovered Dusty Post-RGB Binaries and their Implications on Stellar Evolution

SpeakerTalk DateTalk Series
Devika Kamath26 July 2016Binary Stars Talks

Abstract

Dusty Post-RGB stars are a newly discovered population of low-luminosity, low-metallicity, likely binaries in the Magellanic Clouds. They are likely to have evolved off the RGB via binary interaction. To place these objects in an evolutionary context and establish an evolutionary connection between RGB binaries (such as the Sequence E variables) and our new sample of objects we compare the theoretically predicted birthrates of the progeny of RGB binaries to the observational birthrates of the new sample of objects. In this talk I will present the obtained results and its implications on stellar (binary) evolution. I will also present the Galactic analogues of these objects and use their orbital motion and subsequently the full orbital observables like periods and mass functions to constrain precursors and progeny of this new population of dusty post-RGB binaries.

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