Reference : Observational signatures of past mass-exchange episodes in massive binaries : The cas...
Scientific congresses and symposiums : Poster
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/201412
Observational signatures of past mass-exchange episodes in massive binaries : The cases of LSS 3074 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) >]
Manfroid, Jean mailto [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
Mahy, Laurent mailto [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Jul-2016
No
No
International
Binary Stars in Cambridge 2016
from 24th to 29th July 2016
Cambridge
United Kingdom
[en] stars: early-type ; stars: fundamental parameters ; binaries: spectroscopic ; stars: massive ; stars: individual: LSS 3074 ; stars: individual: HD 17505
[en] Mass and angular momentum exchanges through Roche Lobe Overflow interactions within close massive binaries are known to play an important role in the subsequent evolution of the components 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 in a sample of massive O-star binaries that are thought to have previously experienced a Case A Roche Lobe Overflow episode. Using phase-resolved spectroscopy, we perform the disentangling of the optical spectra of the two stars. The reconstructed primary and secondary spectra re then analysed with the CMFGEN model atmosphere code to determine stellar parameters such as the effective temperatures, surface gravities and rotational velocities, and to constrain the chemical composition of the components. In this contribution, we present the results of our analyses of LSS 3074 (O5.5I + O6.5-7I, P = 2.1852 days), together with the analyses of its photometric lightcurve and orbital solution. We also present the first results of our analyses of the triple system HD17505 ([O7.5V + O7.5V, P = 8.57 days] + O6.5III).
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/2268/201412

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