2011MNRAS.418....2F

Query : 2011MNRAS.418....2F

2011MNRAS.418....2F - Mon. Not. R. Astron. Soc., 418, 2-13 (2011/November-3)

Spectroscopy of the archetype colliding-wind binary WR 140 during the 2009 January periastron passage.

FAHED R., MOFFAT A.F.J., ZOREC J., EVERSBERG T., CHENE A.N., ALVES F., ARNOLD W., BERGMANN T., CORCORAN M.F., CORREIA VIEGAS N.G., DOUGHERTY S.M., FERNANDO A., FREMAT Y., GOUVEIA CARREIRA L.F., HUNGER T., KNAPEN J.H., LEADBEATER R., MARQUES DIAS F., MARTAYAN C., MOREL T., PITTARD J.M., POLLOCK A.M.T., RAUW G., REINECKE N., RIBEIRO J., ROMEO N., SANCHEZ-GALLEGO J.R., DOS SANTOS E.M., SCHANNE L., STAHL O., STOBER BA., STOBER BE., VOLLMANN K. and WILLIAMS P.M.

Abstract (from CDS):

We present the results from the spectroscopic monitoring of WR 140 (WC7pd + O5.5fc) during its latest periastron passage in 2009 January. The observational campaign consisted of a constructive collaboration between amateur and professional astronomers. It took place at six locations, including Teide Observatory, Observatoire de Haute Provence, Dominion Astrophysical Observatory and Observatoire du Mont Mégantic. WR 140 is known as the archetype of colliding-wind binaries and it has a relatively long period (~= 8 yr) and high eccentricity (~=0.9). We provide updated values for the orbital parameters, new estimates for the WR and O star masses and new constraints on the mass-loss rates and colliding-wind geometry.

Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): binaries: general - stars: fundamental parameters - stars: winds, outflows - stars: Wolf–Rayet

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 - 2026 		#notes
1 HD 94305 WR* 10 51 06.0016671120 -62 17 01.650146136   11.69 11.35 11.32   WC6+O7.5V 103 0
2 HD 97152 WR* 11 10 04.0797150120 -60 58 44.963276664 7.47 8.03 8.07 8.91   WC7+O7V 190 0
3 HD 97253 SB* 11 10 42.0464340864 -60 23 04.115936364 6.42 7.24 7.09 8.08   O5III(f) 96 0
4 * tet Mus WR* 13 08 07.1531705448 -65 18 21.679426548 4.71 5.50 5.53 5.44 5.40 WC5+B0III 336 0
5 HD 152270 WR* 16 54 19.6991292072 -41 49 11.531710092 6.26 6.80 6.597 6.72 6.39 WC7+O5-8 315 0
6 HD 163758 s*b 17 59 28.3669369416 -36 01 15.589420824 6.46 7.35 7.32 8.38   O6.5Iafp 163 0
7 HD 193793 WR* 20 20 27.9757908696 +43 51 16.286840244 6.90 7.25 6.85 4.58   WC7pd+O5.5fc 754 0

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