Empirical Bounds for the Ionizing Fluxes of Wolf-Rayet Stars.

Details Empirical Bounds for the Ionizing Fluxes of Wolf-Rayet Stars. Empirical Bounds for the Ionizing Fluxes of Wolf-Rayet Stars.

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...19913508l&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #135.08; Bulletin of the American Astronomical Society, Vol. 33, p.1506

Astronomy and Astrophysics

Astronomy

Scientific paper

Hα photometry and spectroscopic data have been obtained for ten Wolf-Rayet nebulae, representing a wide variety of WN spectral types. We use these data to constrain the ionizing flux of the exciting Wolf-Rayet star, calculating lower bounds for the Lyman continuum flux (Q0) and for the He0- and He+-ionizing fluxes (Q1 and Q2). We find that Q0 appears independent of WN spectral type, and lower bound estimates tend to cluster around 48 dex. We present these data and compare our results to recent models. Our results are consistent with the predictions of line-blanketed ISA-wind models and non-blanketed CMFGEN models, but are consistent with only some of the line-blanketed CMFGEN models. DRL would like to acknowledge the support of the NSF grant funding the REU program at NAU.

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