SIMBAD references

2007MNRAS.376..248H - Mon. Not. R. Astron. Soc., 376, 248-262 (2007/March-3)

Searching for hidden Wolf-Rayet stars in the Galactic plane - 15 new Wolf-Rayet stars.

HADFIELD L.J., VAN DYK S.D., MORRIS P.W., SMITH J.D., MARSTON A.P. and PETERSON D.E.

Abstract (from CDS):

We report the discovery of 15 previously unknown Wolf-Rayet (WR) stars found as part of an infrared (IR) broad-band study of candidate WR stars in the Galaxy. We have derived an empirically based selection algorithm which has selected ∼5000 WR candidate stars located within the Galactic plane drawn from the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (mid-IR) and Two-Micron All-Sky Survey (near-IR) catalogues. Spectroscopic follow-up of 184 of these reveals 11 nitrogen-rich (WN) and four carbon-rich (WC) WR stars. Early WC subtypes are absent from our sample and none shows evidence for circumstellar dust emission. Of the candidates which are not WR stars, ∼120 displayed hydrogen emission-line features in their spectra. Spectral features suggest that the majority of these are in fact B supergiants/hypergiants, ∼40 of these are identified Be/B[e] candidates.

Here, we present the optical spectra for six of the newly detected WR stars, and the near-IR spectra for the remaining nine of our sample. With a WR yield rate of ∼7 per cent and a massive star detection rate of ∼65 per cent, initial results suggest that this method is one of the most successful means for locating evolved, massive stars in the Galaxy.


Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): stars: Wolf-Rayet - Galaxy: stellar content

Nomenclature: Table 2: HDM NN (Nos 1-15).

CDS comments: In chap. 3.1 : Standard star LTT 62648 not identified, it could be LTT 6248.

Simbad objects: 38

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2020.02.17-01:36:45

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