NOAO >   Observing Info >   Approved Programs >   2012A-0348

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Proposal Information for 2012A-0348


PI: Peter I. Papics, K.U.Leuven, Peter.Papics@ster.kuleuven.be
Address: Instituut voor Sterrenkunde, Celestijnenlaan 200D BUS 2401, Leuven 3001, Belgium

CoI: Conny Aerts, K.U.Leuven (Belgium)
CoI: Maryline Briquet, Universite de Liege (Belgium)
CoI: Pieter Degroote, K.U.Leuven (Belgium)
CoI: Andrew Tkatchenko, K.U.Leuven (Belgium)
CoI: Jonas Debosscher, K.U.Leuven (Belgium)

Title: Core overshooting and rotation inside main-sequence B pulsators: an intensive spectroscopic follow-up in quest of mode identification from line profile variations

Abstract: Stellar lifetime is strongly influenced by several internal mixing processes, such as core overshooting and rotation. These effects are poorly known, and the lack of understanding results in uncertainties of current stellar models. As several astrophysical results rely on precise predictions of stellar evolution, these shortcomings need to be remedied. With the recent vast improvements of asteroseismological techniques and instrumentation, these goals are now within reach. Our goal is to give a quantitative seismic estimate of core overshooting and internal rotation in B-type stars, which will be at least one order of magnitude more precise than current estimates. This will propagate to the very first seismic - and thus reliable - calibration of stellar evolution models in the upper part of the Hertzsprung-Russell Diagram (HRD). This approach is only possible thanks to the currently operational \textscKepler space mission, which provides us with continuous photometric monitoring of high frequency resolution and (mu)mag precision, but spectroscopic mode identification provided by high-resolution spectrographs like \textscMaestro is of critical importance to our success.


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NOAO >   Observing Info >   Approved Programs >   2012A-0348

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