2012A&A...545A.121K


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.12CET17:54:46

2012A&A...545A.121K - Astronomy and Astrophysics, volume 545A, 121-121 (2012/9-1)

o Puppis: another Be+sdO binary?

KOUBSKY P., KOTKOVA L., VOTRUBA V., SLECHTA M. and DVORAKOVA S.

Abstract (from CDS):

The spectrum of the Be star o Pup is shown to vary periodically with a period of 28.9-days. A radial-velocity variable HeI 6678Å 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 φ 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 270km/s, a value in good agreement with the range derived for φ Per-type binaries. The radial velocity curves defined by the prominent emission peak in HeI 6678Å line and Hα + Paschen emission move in anti-phase. We suggest that o Pup is generically similar to φ Per-type systems and may represent the fourth case of a Be star with a hot subdwarf companion.

Abstract Copyright:

Journal keyword(s): binaries: spectroscopic - stars: emission-line, Be - stars: individual: o Puppis - binaries: close

VizieR on-line data: <Available at CDS (J/A+A/545/A121): list.dat sp/*>

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * phi Per Be* 01 43 39.6379209 +50 41 19.432832 3.10 4.02 4.06 3.90 3.88 B1.5V:e-shell 526 0
2 HD 58978 Be* 07 26 59.4826767357 -23 05 09.683936209 4.51 5.45 5.56 7.05   B0.5IVe 208 0
3 * omi Pup Be* 07 48 05.1683937 -25 56 13.812276 3.42 4.43 4.49 4.37 4.37 B1IVe 196 0
4 * f01 Cyg Be* 20 59 49.5516391039 +47 31 15.378902421 3.77 4.71 4.75 4.62 4.63 B1.5Vnne 463 0

    Equat.    Gal    SGal    Ecl

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2019.12.12-17:54:46

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