2008A&A...485L..29G


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST22:27:12

2008A&A...485L..29G - Astronomy and Astrophysics, volume 485, L29-32 (2008/7-3)

BD+43° 3654 - a blue straggler?

GVARAMADZE V.V. and BOMANS D.J.

Abstract (from CDS):

The astrometric data on the runaway star BD+43°3654 are consistent with the origin of this O4If star in the center of the Cyg OB2 association, while BD+43°3654 is younger than the association. To reconcile this discrepancy, we suggest that BD+43°3654 is a blue straggler formed via a close encounter between two tight massive binaries in the core of CygOB2. A possible implication of this suggestion is that the very massive (and therefore apparently very young) stars in CygOB2 could be blue stragglers as well. We also suggest that the binary-binary encounter producing BD+43°3654 might be responsible for ejection of two high-velocity stars (the stripped helium cores of massive stars) - the progenitors of the pulsars B2020+28 and B2021+51.

Abstract Copyright:

Journal keyword(s): stars: kinematics - pulsars: individual: PSR B2020+28 - open clusters and associations: individual: Cyg OB2 - stars: individual: BD+43 3654

Simbad objects: 11

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Number of rows : 11

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 * zet Pup BY* 08 03 35.04754 -40 00 11.3321 0.89 1.98 2.25 2.36 2.58 O4I(n)fp 1092 1
2 Ass Cyg OB 9 As* 20 21 +39.9           ~ 118 0
3 PSR B2020+28 Psr 20 22 37.0671 +28 54 23.104           ~ 282 1
4 PSR B2021+51 Psr 20 22 49.8730 +51 54 50.233           ~ 241 1
5 M 29 OpC 20 23 56 +38 31.4   7.30 6.6     ~ 219 0
6 NAME Cyg X Cld 20 28 41 +41 10.2           ~ 619 1
7 18P 59 HII 20 32 31.2 +40 16 35           ~ 63 0
8 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 790 0
9 BD+43 3654 s*b 20 33 36.0795380204 +43 59 07.362541702   11.24 10.06     O4If 50 0
10 [CPR2002] A37 * 20 36 04.4995821629 +40 56 13.037685329           O5V((f)) 18 0
11 * lam Cep s*b 22 11 30.5750839949 +59 24 52.147736074 4.55 5.29 5.05 4.77 4.62 O6.5I(n)fp 646 1

    Equat.    Gal    SGal    Ecl

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2020.07.13-22:27:13

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