Unpublished conference/Abstract (Scientific congresses and symposiums)
Observational signatures of past mass-exchange episodes in massive binaries: The cases of HD 149 404 and HD 17505
Raucq, Françoise; Rauw, Grégor; Gosset, Eric et al.
20154th TIGRE Workshop
 

Files


Full Text
FR_Guanajuato_2015.pdf
Author postprint (719.65 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
stars: early-type; stars: fundamental parameters; binaries: spectroscopic; stars: individual: HD 149 404; stars: individual: HD 17 505; stars: massive
Abstract :
[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).
Research center :
LiSRI - Liège Space Research Institute - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Raucq, Françoise ;  Université de Liège > Groupe d'astrophysique des hautes énergies (GAPHE)
Rauw, Grégor  ;  Université de Liège > Groupe d'astrophysique des hautes énergies (GAPHE)
Gosset, Eric ;  Université de Liège > Groupe d'astrophysique des hautes énergies (GAPHE)
Nazé, Yaël  ;  Université de Liège > Groupe d'astrophysique des hautes énergies (GAPHE)
Mahy, Laurent ;  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
Language :
English
Title :
Observational signatures of past mass-exchange episodes in massive binaries: The cases of HD 149 404 and HD 17505
Publication date :
30 November 2015
Event name :
4th TIGRE Workshop
Event date :
du 30 novembre 2015 au 1er décembre 2015
Audience :
International
Name of the research project :
ARC - Actions de Recherche Concertées; Etoiles massives
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 05 May 2016

Statistics


Number of views
69 (5 by ULiège)
Number of downloads
23 (1 by ULiège)

Bibliography


Similar publications



Contact ORBi