The wind beneath my wings. I. Spectral types and multiplicity of the central stars supporting stellar bow shock nebulae. (2020)
Keywords :
Massive stars; O stars; B stars; Interstellar medium; Stellar-interstellar interactions; Stellar wind bubbles; Dust nebulae; Runaway stars; Stellar bow shocks
Abstract:Arcuate mid-infrared nebulae known as stellar bow shock nebulae (SBNe) have been previously hypothesized to be supported by the strong stellar winds and/or luminosity of massive early-type stars. We present an optical spectroscopic survey of 84 stars identified from mid-infrared images as candidate SBN-supporting stars. Eighty-one of 84 sources, 96%, are O or early-B spectral types. K-band luminosities for a larger sample of 289 stars at the centers of bow shock nebulae are overwhelmingly consistent with OB stars. This affirms both that SBNe are supported by massive stars and that arcuate mid-infrared nebulae are reliable indicators of the presence of a massive star. The radial velocity dispersions of these systems and detections of
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We selected sources from Kobulnicky+, 2016, J/ApJS/227/18 (K16)'s
catalog of 709 candidate stellar bow shock nebulae (SBNe) based upon
the appearance of a clear central stellar source and the optical
brightness of the source as determined from the USNO B1.0 (I/284).
Spectra for 84 sources were obtained between 2015 June and 2018 July
using the 2.3m Wyoming Infrared Observatory's (WIRO) Longslit
spectrograph (spectral coverage of 5400-6800{AA}).
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