2006A&A...448..697C


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.17CEST00:54:50

2006A&A...448..697C - Astronomy and Astrophysics, volume 448, 697-701 (2006/3-3)

A hybrid β Cephei-SPB star in a binary system: γ Pegasi.

CHAPELLIER E., LE CONTEL D., LE CONTEL J.M., MATHIAS P. and VALTIER J.-C.

Abstract (from CDS):

High resolution and high signal to noise ratio spectroscopic observations of the classical β Cephei star γ Peg were obtained between 1991 and 2005. The analysis of these data combined with previously published results shows that γ Peg is a spectroscopic binary with an orbital period of 370.5d. We discovered three new frequencies in addition to the well-known 6.5897d–1 (0.15175d) one. That at 6.01d–1 is a typical β Cephei frequency. The two others at 0.68 and 0.87d–1 are similar to the high degree g-mode frequencies found in SPB stars. Thus, γ Peg is a hybrid β Cephei-SPB star. Its position in the HR diagram is compatible with such a status. In addition, a small increase of the main period has been detected between the 1995 and 2005 observations.

Abstract Copyright:

Journal keyword(s): stars: binaries: spectroscopic - stars: oscillations - stars: individual: β Cephei - stars: variables: general

VizieR on-line data: <Available at CDS (J/A+A/448/697): obsgpeg.dat>

Simbad objects: 3

goto Full paper

goto View the reference in ADS

Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 * gam Peg bC* 00 13 14.1512308 +15 11 00.936759 1.75 2.61 2.84 2.94 3.13 B2IV 657 0
2 * nu. Eri bC* 04 36 19.1414419 -03 21 08.856678 2.82 3.737 3.928     B2III 363 0
3 * bet Cep bC* 21 28 39.5968513 +70 33 38.574681 2.05 3.01 3.23 3.33 3.55 B0.5IIIs 677 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2006A&A...448..697C and select 'bookmark this link' or equivalent in the popup menu


2019.10.17-00:54:50

© Université de Strasbourg/CNRS

    • Contact