2024MNRAS.534.2184H

Query : 2024MNRAS.534.2184H

2024MNRAS.534.2184H - Mon. Not. R. Astron. Soc., 534, 2184-2195 (2024/November-1)

Is WR 104 a face-on, colliding-wind binary?

HILL G.M.

Abstract (from CDS):

Two decades of extensive spectroscopic monitoring of WR 104 is used to confront what we think we understand about this iconic prototype of the dust-producing pinwheel stars. Convincing SB1 orbital solutions are obtained for both the WC9d star and its OB companion. The period ($241.54 \pm 0.14$ d) and circular orbit agree perfectly with results from modelling images of the rotating dust spiral. Contrary to those results though, the orbit is found to be significantly inclined instead of face-on. The two SB1 solutions each indicate $i \sim 45^{\circ }$ but could be as low as $\sim 34^{\circ }$. This result naturally provides an explanation for the long puzzling photometric and emission line strength variations but is difficult to reconcile with the imaging. Confirmation that colliding winds are present is found by the detection of variable excess emission in two of the lines where it would be most expected. The changing shapes of this excess emission are not perfectly phase-locked though, which will complicate future modelling.

Abstract Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): binaries: spectroscopic - stars: individual: WR 104 - stars: Wolf-Rayet

Simbad objects: 1

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Number of rows : 1
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 MR 80 WR* 18 02 04.1244400656 -23 37 42.168277056   15.002 13.155 12.056   WC9 241 1

Query : 2024MNRAS.534.2184H

Basic data :
MR 80 -- Wolf-Rayet
Other object types: otypes_help 		* (CSI,JP11,...), WR* (1962AJ,WR,...), IR (BAaDE,IRAS,...), V* (ASAS,Had,...), MIR (MSX6C,WISE), AB* (2020ApJ), C*? (2022yCat), LP? (2022yCat), Em* (Ve), NIR (2MASS)
ICRS coord. (ep=J2000) : 		18 02 04.1244400656 -23 37 42.168277056 (Optical) [ 0.1859 0.1495 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		17 59 01.1111643707 -23 37 44.509744012 [ 0.1859 0.1495 90 ]
Gal coord. (ep=J2000) : 		006.4431938183604 -00.4854102301979 [ 0.1859 0.1495 90 ]
Proper motions mas/yr : 		-0.416 -0.339 [0.255 0.171 90] A 2020yCat.1350....0G
Parallaxes (mas): 		1.5644 [0.2004] A 2020yCat.1350....0G
Spectral type: 		WC9 C 1978MNRAS.185...47C
Fluxes (10) :
B 15.002 [0.02] E 2012yCat.1322....0Z
V 13.155 [0.01] E 2012yCat.1322....0Z
R 12.056 [0.05] E 2012yCat.1322....0Z
G 12.904261 [0.050737] C 2020yCat.1350....0G
J 6.666 [0.026] C 2003yCat.2246....0C
H 4.343 [0.236] D 2003yCat.2246....0C
K 2.423 [0.256] D 2003yCat.2246....0C
g 14.120 [0.01] E 2012yCat.1322....0Z
r 12.323 [0.01] E 2012yCat.1322....0Z
i 11.163 [0.01] E 2012yCat.1322....0Z
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Identifiers (20) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

WR 104 IRAS 17590-2337 MSX6C G006.4432-00.4858 V* V5097 Sgr
ASAS J180205-2337.7 IRC -20417 RAFGL 2048 Ve 2-45
BAaDE ad3a-06452 JP11 5559 TIC 110170548 WISE J180204.06-233739.9
CSI-23-17590 2MASS J18020412-2337419 UCAC2 22296214 Gaia DR2 4069167258796371712
Had V82 MR 80 UCAC4 332-127589 Gaia DR3 4069167258796371712

References (241 between 1850 and 2026) (Total 241)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Plx : 2    PM : 2    SpT : 3   

   

Observing logs
ISO : 4   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : MR 80

Link by name to the catalogue in VizieR :

IRAS 17590-2337 IRC -20417 2MASS J18020412-2337419 MSX6C G006.4432-00.4858 RAFGL 2048
UCAC2 22296214 UCAC4 332-127589 V* V5097 Sgr WISE J180204.06-233739.9 Gaia DR2 4069167258796371712
Gaia DR3 4069167258796371712

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