1997A&A...318..812D


Query : 1997A&A...318..812D

1997A&A...318..812D - Astronomy and Astrophysics, volume 318, 812-818 (1997/2-3)

The number of O-type runaways, the number of O and Wolf-Rayet stars with a compact companion and the formation rate of double pulsars predicted by massive close binary evolution.

DE DONDER E., VANBEVEREN D. and VAN BEVER J.

Abstract (from CDS):

Using a detailed model of massive close binary evolution and accounting properly for the effects of asymmetric supernova explosions (SN) where we use recent observations of pulsar runaway velocities, we determine the theoretically expected number of post-SN O-type stars with and without a compact companion (CC), the number of O-type runaways, the number of WR+CC systems and the formation rate of binary pulsars in our Galaxy. We conclude that o at least 50% of the O-type runaways are formed through the binary scenario, o less than 3% of all WR stars may hide a CC, o the formation rate of binary pulsars in our Galaxy ≃0.003-0.01 times the formation rate of massive stars; this corresponds roughly to a binary pulsar formation rate of the order of 10–5/year in agreement with the observations. Our results reveal a significant fraction of single WR stars but with a binary history. We also predict the existence of 'weird' WR stars, i.e a WR star with a CC in its centre (descendants of Thorne-{dot}(Z)ytkow objects).

Abstract Copyright:

Journal keyword(s): stars: evolution - early-type - kinematics - binaries: close: Wolf-Rayet - pulsars

Simbad objects: 15

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Number of rows : 15
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 HD 63099 WR* 07 45 50.3991805440 -34 19 48.500286780 11.47 11.43 10.50 10.37   WC4+O7 108 0
2 * gam02 Vel WR* 08 09 31.95013 -47 20 11.7108 0.64 1.58 1.83 1.85 2.00 WC8+O7.5III-V 868 0
3 HD 90657 WR* 10 26 31.4087563344 -58 38 26.182481568 9.53 10.07 9.65 9.84   WN5+O4-6 156 0
4 MR 30 WR* 10 51 06.0016671120 -62 17 01.650146136   11.69 11.35 11.32   WC6+O7.5V 99 0
5 HD 94546 WR* 10 53 44.8196302 -59 30 46.694249 10.38 10.94 10.51 10.48   WN4+O8V 117 0
6 HD 97152 WR* 11 10 04.0797150120 -60 58 44.963276664 7.47 8.03 8.07 8.91   WC7+O7V 179 0
7 HD 152270 WR* 16 54 19.6991292072 -41 49 11.531710092 6.26 6.80 6.597 6.72 6.39 WC7+O5-8 296 0
8 HD 320102 WR* 17 36 53.6232746376 -34 02 36.778424604 11.51 11.60 10.72 10.65   WN4+O5/7V 90 0
9 HD 168206 WR* 18 19 07.3629298440 -11 37 59.164994424 9.65 9.88 9.10     WC8+O8/9III/V 294 1
10 HD 186943 WR* 19 46 15.9393580368 +28 16 19.077099276 9.86 10.50 10.23     WN3+O9.5V 181 1
11 HD 190918 WR* 20 05 57.3244526328 +35 47 18.150756792 6.11 6.88 6.75     WN5+O9I 357 0
12 HD 193576 WR* 20 19 32.4229160448 +38 43 53.959035756 8.15 8.53 8.00     WN5+O6II-V 692 0
13 HD 197406 WR* 20 41 21.5485520640 +52 35 15.142636896 10.42 10.87 10.30     WN8h+B3IV/BH 190 0
14 MR 114 WR* 22 09 33.4430950032 +57 44 30.527883600 12.78 12.946 12.078 11.853   WN4+O5V 136 0
15 HD 214419 WR* 22 36 53.9548302648 +56 54 20.989190232 8.68 9.21 8.80     WN6o+O9Ib/II 366 1

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2022.07.03-23:03:35

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