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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/28749

Title: Binary asteroseismic modelling: isochrone-cloud methodology and application to Kepler gravity mode pulsators
Authors: Johnston, C.
Tkachenko, A.
Aerts, Conny
Molenberghs, Geert
Bowman, D. M.
Pedersen, M. G.
Buysschaert, B.
Papics, P. I.
Issue Date: 2019
Publisher: OXFORD UNIV PRESS
Citation: Monthly notices of the Royal Astronomical Society (Print), 482(1), p. 1231-1246
Abstract: The simultaneous presence of variability due to both pulsations and binarity is no rare phenomenon. Unfortunately, the complexities of dealing with even one of these sources of variability individually means that the other signal is often treated as a nuisance and discarded. However, both types of variability offer means to probe fundamental stellar properties in robust ways through asteroseismic and binary modelling. We present an efficient methodology that includes both binary and asteroseismic information to estimate fundamental stellar properties based on a grid-based modelling approach. We report parameters for three gravity mode pulsating Kepler binaries, such as mass, radius, age, as well the mass of the convective core and location of the overshoot region. We discuss the presence of parameter degeneracies and the way our methodology deals with them. We provide asteroseismically calibrated isochrone-clouds to the community; these are a generalization of isochrones when allowing for different values of the core overshooting in the two components of the binary.
Notes: [Johnston, C.; Tkachenko, A.; Aerts, C.; Bowman, D. M.; Pedersen, M. G.; Buysschaert, B.; Papics, P. I.] Katholieke Univ Leuven, Inst Sterrenkunde, Celestijnenlaan 200D, B-3001 Leuven, Belgium. [Aerts, C.] Radboud Univ Nijmegen, IMAPP, Dept Astrophys, POB 9010, NL-6500 GL Nijmegen, Netherlands. [Molenberghs, G.] Univ Hasselt, I BioStat, Martelarenlaan 42, B-3500 Hasselt, Belgium. [Molenberghs, G.] Katholieke Univ Leuven, I BioStat, Kapucijnenvoer 35, B-3000 Leuven, Belgium. [Buysschaert, B.] Univ Paris Diderot, UPMC Univ Paris 06, Sorbonne Univ, LESIA,Observ Paris,PSL Res Univ,CNRS,Sorbonne Par, 5 Pl Jules Janssen, F-92195 Meudon, France.
URI: http://hdl.handle.net/1942/28749
DOI: 10.1093/mnras/sty2671
ISI #: 000454575300087
ISSN: 0035-8711
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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