B 517 - Another very late WNL star in M 33.

Details B 517 - Another very late WNL star in M 33. B 517 - Another very late WNL star in M 33.

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...318..543c&link_type=abstract

Astronomy and Astrophysics, v.318, p.543-547

Astronomy and Astrophysics

Astrophysics

12

Stars: Wolf-Rayet, Galaxies: Individual: M33, Stars: Individual: B517 (M33), Galaxies: Stellar Content

Scientific paper

We present intermediate dispersion optical spectroscopy of the M 33 star B517 (Humphreys & Sandage 1980ApJS...44..319H) obtained at the 3.5m Calar Alto and 4.2m William Herschel Telescopes. Our data reveal a spectral type of WN11h, closely resembling the Galactic LBV candidate He 3-519 (Smith et al. 1994A&A...281..833S). We find that B517 is the WNL star observed by Esteban et al. (1994AJ....107.1041E), named MC70 therein, and present a spectral analysis using the Hillier (1990A&A...231..116H) iterative scheme. We find that its stellar parameters (T_*_=27kK, log L/Lsun_=5.74, log ˙(M)/Msun_/yr=-4.3, vinfinity_=275km/s) are similar to LMC WN11 stars (Crowther & Smith 1996, submitted), with a higher helium content (H/He~0.8 by number), suggesting a post-LBV evolutionary status.

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