2006A&A...460..777G


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.24CET01:12:25

2006A&A...460..777G - Astronomy and Astrophysics, volume 460, 777-782 (2006/12-4)

The first orbital solution for the massive colliding-wind binary HD 93162 (=WR 25).

GAMEN R., GOSSET E., MORRELL N., NIEMELA V., SANA H., NAZE Y., RAUW G., BARBA R. and SOLIVELLA G.

Abstract (from CDS):

Since the discovery, with the EINSTEIN satellite, of strong X-ray emission associated with HD 93162 (=WR 25), this object has been predicted to be a colliding-wind binary system. However, radial-velocity variations that would prove the suspected binary nature have yet to be found. We spectroscopically monitored this object to investigate its possible variability to address this discordance. We compiled the largest available radial-velocity data set for this star to look for variations that might be due to binary motion. We derived radial velocities from spectroscopic data acquired mainly between 1994 and 2006, and searched these radial velocities for periodicities using different numerical methods. For the first time, periodic radial-velocity variations are detected. Our analysis definitively shows that the Wolf-Rayet star WR 25 is an eccentric binary system with a probable period of about 208days.

Abstract Copyright:

Journal keyword(s): stars: binaries: spectroscopic - stars: Wolf-Rayet - stars: individual: HD 93162

Simbad objects: 4

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Number of rows : 4

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 HD 92740 WR* 10 41 17.5154230335 -59 40 36.897706569 5.68 6.50 6.42 7.38   WN7h+O9III-V 376 0
2 HD 93131 WR* 10 43 52.2575981063 -60 07 04.016913264 5.52 6.43 6.48 7.46   WN6ha-w 270 0
3 HD 93162 WR* 10 44 10.3888220947 -59 43 11.105959983 7.90 8.55 8.80 8.66   O2.5If*/WN6+OB 330 1
4 NGC 3372 HII 10 44 19.0 -59 53 21           ~ 876 2

    Equat.    Gal    SGal    Ecl

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2020.02.24-01:12:25

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