o Puppis: another Be plus sdO binary?
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F12%3A00107091" target="_blank" >RIV/00216224:14310/12:00107091 - isvavai.cz</a>
Alternative codes found
RIV/67985815:_____/12:00388412
Result on the web
<a href="http://dx.doi.org/10.1051/0004-6361/201219679" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201219679</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201219679" target="_blank" >10.1051/0004-6361/201219679</a>
Alternative languages
Result language
angličtina
Original language name
o Puppis: another Be plus sdO binary?
Original language description
The spectrum of the Be star o Pup is shown to vary periodically with a period of 28.9 days. A radial-velocity variable He I 6678 angstrom emission component suggests that the star is the same type as phi Per, 59 Cyg, and FY CMa, i.e. binaries consisting of a Be star and a hot companion that illuminates the Be star disk (also called phi Per-type binaries or Be+sdO binaries). The range of radial-velocity variations of the stronger emission component in the helium line observed in o Pup is about 270 km s(-1), a value in good agreement with the range derived for phi Per-type binaries. The radial velocity curves defined by the prominent emission peak in He I 6678 angstrom line and H alpha + Paschen emission move in anti-phase. We suggest that o Pup is generically similar to phi Per-type systems and may represent the fourth case of a Be star with a hot subdwarf companion.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ASTRONOMY & ASTROPHYSICS
ISSN
0004-6361
e-ISSN
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Volume of the periodical
545
Issue of the periodical within the volume
A121
Country of publishing house
FR - FRANCE
Number of pages
4
Pages from-to
1-4
UT code for WoS article
000309254900121
EID of the result in the Scopus database
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