2007A&A...470L...9G


Query : 2007A&A...470L...9G

2007A&A...470L...9G - Astronomy and Astrophysics, volume 470, L9-12 (2007/8-1)

Separated before birth: pulsars B2020+28 and B2021+51 as the remnants of runaway stars.

GVARAMADZE V.V.

Abstract (from CDS):

Astrometric data on the pulsars B2020+28 and B2021+51 suggest that they originated within several parsecs of each other in the direction of the Cyg OB2 association. It was proposed that the pulsars share their origin in a common massive binary and were separated at the birth of the second pulsar following the asymmetric supernova explosion. We consider a different scenario for the origin of the pulsar pair based on a possibility that the pulsars were separated before their birth and that they are the remnants of runaway stars ejected (with velocities similar to those of the pulsars) from the core of Cyg OB2 due to strong three- or four-body dynamical encounters. Our scenario does not require any asymmetry in supernova explosions.

Abstract Copyright:

Journal keyword(s): pulsars: individual: PSR B2020+28 - open clusters and associations: individual: PSR B2021+51

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 HE 0437-5439 HS* 04 38 12.7828168224 -54 33 11.834984736 15.37 16.18 16.42     sdB+F 70 0
2 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1541 1
3 [SS59] II 135 HV* 12 22 29.6071189680 +40 49 35.559753384   11.53 11.85     B4V 49 0
4 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 12903 0
5 PSR B2020+28 Psr 20 22 37.0671 +28 54 23.104           ~ 292 1
6 PSR B2021+51 Psr 20 22 49.8730 +51 54 50.233           ~ 251 1
7 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 870 0

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2022.05.22-12:29:25

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