binaries: general; stars: early-type; stars: emission-line, Be; stars: massive; X-rays: stars; Be Stars; Binaries:general; Binarity; Hard X ray; High quality; Stars: emission-line be; Stars: massive; Stars:early type; X-ray emission; X-ray:stars; Multidisciplinary
Abstract :
[en] Some Be stars exhibit a bright and extremely hard X-ray emission, whose origin is debated. In this context, it has been advocated that stripped helium-star sdO companions could play a significant role. Using high quality datasets, we examined (1) the binarity of these peculiar Be stars and (2) the X-ray emission of known Be+sdO systems. In this contribution, we present the result of these two studies and assess their impact on the proposed scenario.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Nazé, Yaël ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE) ; F.R.S.-FNRS Senior Research Associate, Belgium
Rauw, Grégor ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE)
Smith, Myron A.; NSF OIR Lab, Tucson, United States
Motch, Christian; Université de Strasbourg, CNRS, Observatoire Astronomique de Strasbourg, UMR 7550, Strasbourg, France
Language :
English
Title :
sdO and peculiar X-ray emissions
Publication date :
2023
Journal title :
Bulletin de la Société Royale des Sciences de Liège
ISSN :
0037-9565
eISSN :
1783-5720
Publisher :
Societe Royale des Sciences de Liege
Volume :
92
Issue :
2
Peer reviewed :
Editorial Reviewed verified by ORBi
Funding text :
Y.N. and G.R. acknowledge support from the Fonds National de la Recherche Scientifique (Belgium), the European Space Agency (ESA) and the Belgian Federal Science Policy Office (BELSPO) in the framework of the PRODEX Programme (contracts linked to XMM-Newton). M.A.S. acknowledges support from Chandra grant #362675.
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