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2001MNRAS.325.1213W - Mon. Not. R. Astron. Soc., 325, 1213-1227 (2001/August-2)
Kinematics of the Gum nebula region.
WOERMANN B., GAYLARD M.J. and OTRUPCEK R.
Abstract (from CDS):
The path of the runaway O-star ζ Puppis passed within <0.5° of the expansion centre of the neutral shell ∼1.5Myr ago. The supernova of the erstwhile binary companion of ζ Puppis is the probable origin of the Gum nebula and the swept up expanding neutral shell. The 500-pc distance to the supernova is adopted as the distance to the expansion centre of the neutral shell. At this distance the energy required to produce the observed expansion could have been met with a single supernova. The radii of the front and back faces of the shell are 130 and 70pc respectively. The front face is expanding faster than the back face, at 14 and 8.5km.s–1 respectively.
The extent of the neutral shell matches the radio continuum and Hα emission of the Gum nebula well. The photoionized gas in the nebula is probably primarily ionized by ζ Puppis, which is still within the neutral shell. No evidence was found for the IRAS-Vela shell as a separate expanding shell.
Abstract Copyright: The Royal Astronomical Society
Journal keyword(s): stars: individual: ζ Pup - Hii regions - ISM: individual: Gum nebula - ISM: individual: IRAS-Vela shell - ISM: kinematics and dynamics - ISM: supernova remnants
Nomenclature: Table 3: DMC GLLL.ll+BB.bb N=100.
Simbad objects: 48
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