2002A&A...388..268M


C.D.S. - SIMBAD4 rel 1.7 - 2019.08.19CEST10:58:52

2002A&A...388..268M - Astronomy and Astrophysics, volume 388, 268-278 (2002/6-2)

Spectroscopy of four early-type eclipsing binaries.

MAYER P., LORENZ R. and DRECHSEL H.

Abstract (from CDS):

New spectroscopic data were obtained for the early-type binaries V337 Aql, V649 Cas, V382 Cyg, and V431 Pup. Their radial velocity curves are presented. These are the first such data for V337 Aql and V431 Pup. In the case of V382 Cyg, our data confirm previously obtained results. Especially for V649 Cas our radial velocity curve yields important new implications for the component masses: the detection of third body lines, which are blended with the lines of the primary component, solves the problem of the unacceptably small masses formerly deduced for this binary; now we determine masses closer to the values expected for spectral type B0. V431 Pup is an important object, because it is a new member of the small group of early-type eclipsing binaries with an evolved component. A published light curve of V337 Aql is solved by the MORO code, and system parameters are derived. The period of V649 Cas is found to be variable, and a more accurate period is calculated for V431 Pup.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - binaries: spectroscopic - stars: early-type - stars: fundamental parameters - stars: individual: V337 Aql, V649 Cas, V382 Cyg, V431 Pup

Simbad objects: 8

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Number of rows : 8

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 V* SZ Cam bL* 04 07 49.2860550827 +62 19 58.627126529 6.82 7.26 6.93     O9.5Vn 201 1
2 HD 35921 bL* 05 29 42.65002 +35 22 30.0896 6.23 6.96 6.85     O9II 225 0
3 V* V431 Pup EB* 08 17 17.6192537580 -42 31 17.511808039 6.89 7.48 7.17 7.95   B1/2Iab/b 58 1
4 V* AB Cru Al* 12 17 37.1224049736 -58 09 52.436401661 7.75 8.59 8.49 9.53   B1/2III/V 63 0
5 V* V1182 Aql bL* 18 55 23.1253977999 +09 20 48.087039876 8.73 9.10 8.64     O7V(n)((f))z+B 102 0
6 V* V337 Aql bL* 19 04 10.1937458004 -02 01 47.062901501 8.58 9.315 8.890 9.51   B0.5V 61 0
7 V* V382 Cyg bL* 20 18 47.2203014045 +36 20 26.091543194 9.35 9.19 8.65     O6IVn+O5Vn 169 0
8 V* V649 Cas Al* 23 16 27.0491431825 +61 57 46.572598817 6.130 6.760 6.550     B0Vn 66 0

    Equat.    Gal    SGal    Ecl

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2019.08.19-10:58:52

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