Reference : Observational signatures of past mass-exchange episodes in massive binaries: The case...
Scientific congresses and symposiums : Unpublished conference/Abstract
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/196396
Observational signatures of past mass-exchange episodes in massive binaries: The cases of HD 149 404 and HD 17505
English
Raucq, Françoise mailto [Université de Liège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Rauw, Grégor mailto [Université de Liège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Gosset, Eric mailto [Université de Liège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Nazé, Yaël mailto [Université de Liège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Mahy, Laurent mailto [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Hervé, Anthony [Astronomical Institute of the Czech Academy of Sciences, Fričova 298, 251 65, Ondřejov, Czech Republic > > > >]
Martins, Fabrice []
30-Nov-2015
No
International
4th TIGRE Workshop
du 30 novembre 2015 au 1er décembre 2015
[en] stars: early-type ; stars: fundamental parameters ; binaries: spectroscopic ; stars: individual: HD 149 404 ; stars: individual: HD 17 505 ; stars: massive
[en] Mass and momentum exchanges in close massive binaries play an important role in the evolution of such systems and produce several observational signatures, such as asynchronous rotation and altered chemical compositions, that remain once the stars detach again. We have started to investigate these effects for a sample of detached massive O-star binaries that are thought to have previously experienced a Case A Roche Lobe Overflow. Using phase-resolved spectroscopy, we perform the disentangling of the spectra of the two stars. The reconstructed primary and secondary spectra are then analyzed to determine a range of stellar effective temperatures and gravity, and rotational velocities. Using model atmosphere codes we also constrain the chemical composition of the components. In this contribution, we present the results of our analyses of HD149404 (O7.5If + ON9.5I, P = 9.81 days) and the first results of our analyses of HD17505 ([O7.5V + O7.5V, P = 8.57 days] + O6.5III).
Liège Space Research Institute - LiSRI
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Action de Recherche Concertée, ARC, Etoiles massives
Researchers ; Students
http://hdl.handle.net/2268/196396

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