2006A&A...447..667F


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.23CEST20:24:29

2006A&A...447..667F - Astronomy and Astrophysics, volume 447, 667-680 (2006/2-4)

The massive eclipsing LMC Wolf-Rayet binary BAT99-129. I. Orbital param eters, hydrogen content and spectroscopic characteristics.

FOELLMI C., MOFFAT A.F.J. and MARCHENKO S.V.

Abstract (from CDS):

objS{BAT99 129}{BAT99-129} in the LMC is one among a handful of extra-galactic eclipsing Wolf-Rayet binaries known. We present blue, medium-resolution, phase-dependent NTT-EMMI spectra of this system that allow us to separate the spectra of the two components of the binary and to obtain a reliable orbital solution for both stars. We assign an O5V spectral type to the companion, and WN3(h)a to the Wolf-Rayet component. We discuss the spectroscopic characteristics of the system: luminosity ratio, radii, rotation velocities. We find a possible oversynchronous rotation velocity for the O star. Surprisingly, the extracted Wolf-Rayet spectrum clearly shows the presence of blueshifted absorption lines, similar to what has been found in all single hot WN stars in the SMC and some in the LMC. We also discuss the presence of such intrinsic lines in the context of hydrogen in SMC and LMC Wolf-Rayet stars, WR+O binary evolution and GRB progenitors. Altogether, BAT99 129 is the extragalactic counterpart of the well-known Galactic WR binary V444 Cygni.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - stars: fundamental parameters - stars: Wolf-Rayet - stars: evolution - methods: data analysis - stars: individual: BAT-129

Simbad objects: 19

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Number of rows : 19

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 GRB 021004 gB 00 26 54.68 +18 55 41.6           ~ 519 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9767 1
3 HD 5980 WR* 00 59 26.5847969465 -72 09 53.927725716   11.13 11.31   11.029 WN4+O7I: 363 1
4 AzV 446 * 01 09 25.4274868978 -73 09 29.907690746 13.37 14.38 14.61   14.91 O6.5Vz 18 0
5 HD 9974 WR* 01 38 55.6271504593 +58 09 22.671823428 9.85 10.71 10.69     WN3h-w 160 0
6 HD 34169 WR* 05 09 40.4192565947 -68 53 24.755119043 12.773 13.47 13.65 14.02 13.697 WN4b+O5: 60 1
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15308 1
8 [GMP94] 496 * 05 26 44.2108 -68 48 42.116   13.50 13.73     O5V(f) 9 0
9 Brey 52 WR* 05 34 52.0246318634 -67 21 28.976682258 13.624 14.451 14.597 14.84 14.719 WN4ha: 40 0
10 Brey 97 WR* 05 41 48.5698169547 -70 35 30.786068009 13.570 14.522 14.701 14.50 14.834 MN3ha+O5V 23 1
11 HD 62910 WR* 07 44 58.2216344436 -31 54 29.553631132 10.08 10.44 10.10 10.17   WN6/WC4 119 0
12 V* V712 Car EB* 10 23 58.0120989646 -57 45 48.938103165 15.466 15.473 13.5 12.6   O3If*/WN6+O3If*/WN6 150 1
13 GRB 980910 gB 13 00 -21.1           ~ 20 2
14 SN 1999E SN* 13 17 16.37 -18 33 13.4   18       SNIIn 84 2
15 HD 186943 WR* 19 46 15.9393000440 +28 16 19.074048808 9.86 10.50 10.23     WN3+O9.5V 179 1
16 HD 187282 WR* 19 48 32.1968574697 +18 12 03.693991312 9.60 10.49 10.51     WN4(h)-w 187 0
17 HD 193576 WR* 20 19 32.4230196684 +38 43 53.958209968 8.15 8.53 8.00     WN5+O6II-V 687 0
18 HD 211564 WR* 22 16 24.0322637172 +55 37 36.763974776   11.72 11.61     WN3(h)-w 116 0
19 HD 214419 WR* 22 36 53.9549498582 +56 54 20.985957352 8.68 9.21 8.80     WN6o+O9Ib/II 364 1

    Equat.    Gal    SGal    Ecl

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