2015A&A...581A..37L


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.21CET10:30:21

2015A&A...581A..37L - Astronomy and Astrophysics, volume 581A, 37-37 (2015/9-1)

Period change of massive binaries from combined photometric and spectroscopic data in Cygnus OB2.

LAUR J., TEMPEL E., TUVIKENE T., EENMAEE T. and KOLKA I.

Abstract (from CDS):

Mass loss is an important property in evolution models of massive stars. As up to 90% of the massive stars have a visual or spectroscopic companion and many of them exhibit mass exchange, mass-loss rates can be acquired through studying the period of massive binaries. Using our own photometric observations as well as archival data, we searched for variations in orbital periods of seven massive eclipsing binary systems in the Cygnus OB2 association and estimated their mass-loss rates and stellar parameters. We used a Bayesian parameter estimation method to simultaneously fit the period and period change to all available data and a stellar modelling tool to model the binary parameters from photometric and radial-velocity data. Four out of the seven selected binaries show non-zero period change values at two-sigma confidence level. We also report the eclipsing nature of the star MT059 for the first time.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - stars: mass-loss - open clusters and associations: individual: Cygnus OB2 - stars: massive

Simbad objects: 9

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Number of rows : 9

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 NAME Cyg X Cld 20 28 41 +41 10.2           ~ 595 1
2 [CPR2002] B17 s*b 20 30 27.3017352150 +41 13 25.127848580     13.053     O6Iaf+O9Ia 25 0
3 Schulte 1 SB* 20 31 10.544472 +41 31 53.52024 12.82 12.69 11.09 10.57   O9V 56 0
4 BD+40 4212 EB* 20 31 37.5055016113 +41 13 20.999123545 12.46 11.5 10.214     O9: 68 1
5 BD+40 4220 EB* 20 32 22.4241357648 +41 18 18.942382590 11.32 10.79 9.185     O6.5-7f+O5.5-6f 366 0
6 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 768 0
7 Schulte 27 EB* 20 33 59.5273209521 +41 17 35.483379508 14.44 13.97 12.203     O9.7V(n)+O9.7V(n) 41 0
8 RLP 814 EB* 20 34 06.0156530592 +41 08 09.128736588 16.37 15.64 13.415     B0V 23 0
9 RLP 357 EB* 20 34 58.7803708668 +41 36 17.360548402   12.81 11.418     B0Ib 23 0

    Equat.    Gal    SGal    Ecl

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2020.01.21-10:30:21

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