Other
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725129k&link_type=abstract
American Astronomical Society, AAS Meeting #217, #251.29; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
The faint wing-like features at velocities beyond the velocity boundaries of the Galactic rotation (Forbidden-Velocity Wings, FVWs) in the large-scale position-velocity diagrams of the HI surveys are thought to be associated with dynamical Galactic events. Most of the FVWs do not have counterparts in radio continuum or X-rays. The primary candidates of these FVWs with previously unknown nature are rapidly expanding HI shells of the old Galactic supernova remnants, which are too faint to be visible in other frequencies. We present preliminary results of a search for FVWs in the I-GALFA survey, which has the unprecedented sensitivity and resolution. About 40 FVWs have been identified in the Galactic Plane, 70% of which are smaller and fainter than the previously identified FVWs and are not associated with the known Galactic objects. We present their statistical properties and the HI images of some interesting FVWs.
Douglas Kevin Arthur
Gibson Sister Jean
Heiles Carl E.
Kang Ji-hyun
Koo B.
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