Wolf-Rayet stars in the Magellanic Clouds. IV - The extraordinarily broad-lined, triple system R130 in the Large Magellanic Cloud

Abstract

view Abstract Citations (15) References (40) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Wolf-Rayet Stars in the Magellanic Clouds. IV. The Extraordinarily Broad-lined, Triple System R130 in the Large Magellanic Cloud Moffat, Anthony F. J. ; Seggewiss, Wilhelm Abstract R130 is a luminous, hot star with a dual spectrum: WN6 + B 1 Ia. The Wolf-Rayet component has an extraordinarily fast wind for its subtype. The strongly diluted emission line of He II 4686 Å from the W - R star reveals a 4 day radial velocity orbit of moderate amplitude (K ≍ 200 km s-1) while the absorption lines of the B supergiant yield essentially zero amplitude (K = 7 ± 9 km s-1). Hence, unless one of the stars has a very peculiar mass, the WN6 star must be orbiting a third, unseen star, which is most likely a normal luminosity O star of moderate mass, similar to the mass of the WN6 star. This is reminiscent of the galactic WC6 (+O) + O9.7 lab system θ Mus. Although R130 was originally identified with an Einstein Observatory IPC source (and thus R130 would be exceedingly bright in medium-soft X-rays), later HRI observations by Pollock fail to confirm this with certainty. Publication: The Astrophysical Journal Pub Date: October 1986 DOI: 10.1086/164640 Bibcode: 1986ApJ...309..714M Keywords: Magellanic Clouds; Stellar Spectra; Triple Stars; Wolf-Rayet Stars; X Ray Sources; B Stars; Binary Stars; Orbital Elements; Radial Velocity; Stellar Orbits; Astrophysics; GALAXIES: MAGELLANIC CLOUDS; STARS: BINARIES; STARS: WOLF-RAYET; X-RAYS: SOURCES full text sources ADS | data products SIMBAD (8) NED (1) Related Materials (6) Part 1: 1982ApJ...257..110M Part 2: 1982ApJ...257..116B Part 3: 1985ApJ...292..511M Part 5: 1988ApJ...330..766M Part 6: 1990ApJ...348..232M Part 7: 1989ApJ...347..373M