NOAO >   Observing Info >   Approved Programs >   2018A-0350

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Program Information for 2018A-0350


PI: William Chick, U. of Wyoming, wchick@uwyo.edu
Address: Department of Physics and Astronomy, Laramie, WY, 82071 USA

CoI: Henry Kobulnicky, U. of Wyoming
CoI: Daniel Baldwin, U. of Wyoming

Title: Characterization of Bowshock Supporting Massive Runaway Stars

Abstract: A small but significant fraction of early-type massive stars have been observed to be high velocity runaway stars moving supersonically away from their origin. When these stars encounter nebular gas, they create arcuate shock fronts of heated and compressed gas and dust. Using the distinct infrared emission morphology of the warm dust, these bowshock nebulae have been shown to reveal the location of previously unknown massive stars. Out team has discovered more than 650 previously undocumented bowshock nebula candidates along the Galactic Plane through visual inspection of 24 micron images from the Spitzer Space Telescope. Spectroscopic observations of candidate bowshock supporting stars using the 2.3m Wyoming Infrared and 8m Gemini Observatories have shown that more than 85% of the targeted nebulae were powered by massive stars. We request Gemini Flamingos-2 infrared spectroscopy to classify the stellar types and measure the binarity and radial velocities of a more complete subset of these bowshock supporting stars. We propose 18.56 hours of Flamingos-2 long-slit infrared spectroscopy to observe 19 previously unobserved bowshock supporting stellar sources.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2018A):  GEM-SQ/Flamingos2 -- 18.6hrs band 3 (GS-2018A-Q-321 )


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NOAO >   Observing Info >   Approved Programs >   2018A-0350

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