Reference : π Aquarii is another γ Cassiopeiae object
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/211896
π Aquarii is another γ Cassiopeiae object
English
Nazé, Yaël mailto [Université de Liège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Rauw, Grégor mailto [Université de Liège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Cazorla, Constantin mailto [Université de Liège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
1-May-2017
Astronomy and Astrophysics
EDP Sciences
602
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] stars: early-type ; stars: emission-line ; Be ; X-rays: stars ; stars: individual:πAqr
[en] The γ Cas category is a subgroup of Be stars displaying a strong, hard, and variable thermal X-ray emission. An XMM-Newton observation of π Aqr reveals spectral and temporal characteristics that clearly make this Be star another member of the γ Cas category. Furthermore, π Aqr is a binary but, contrary to γ Cas, the nature of the companion to the Be star is known; it is a non-degenerate (stellar) object and its small separation from the Be star does not leave much room for a putative compact object close to the Be disk. This renders the accretion scenario difficult to apply in this system, and, hence, this discovery favors a disk-related origin for the γ Cas phenomenon. Based on observations collected with the ESA science mission XMM-Newton, an ESA Science Mission with instruments and contributions directly funded by ESA Member States and the USA (NASA).
Space sciences, Technologies and Astrophysics Research - STAR
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/211896
10.1051/0004-6361/201731135
http://adsabs.harvard.edu/abs/2017A%26A...602L...5N

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