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The Crab Nebula's Jet

Published online by Cambridge University Press:  04 August 2017

Robert Fesen  and
Theodore Gull
Robert Fesen
Affiliation:
Laboratory for Astronomy and Solar Physics, NASA/Goddard Space Flight Center, Greenbelt, Maryland
Theodore Gull
Affiliation:
Laboratory for Astronomy and Solar Physics, NASA/Goddard Space Flight Center, Greenbelt, Maryland

Extract

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Using deeply exposed Schmidt plates, van den Bergh (1970) discovered a peculiar jetlike feature extending about 100″ beyond the Crab Nebula's northern boundary. The feature roughly coincided with a spur in the outer intensity contour map of the Crab's continuum emission (5200–6400A) made by Woltjer (1957) from plates taken by Baade with the 200 inch. However, little if any continuous synchroton emission is visible in the jet's region on Scargle's (1970) deep continuum photograph. More recent imaging of the jet by Chevalier and Gull (1975) and Wyckoff et al. (1976) using narrow passband interference-filters, show it slightly better than van den Bergh's plates, and indicate it is most visible in [0 III] 5007A emission. Spectroscopy of the jet's southern portion by Davidson (1978, 1979) confirmed that the [0 III] 4959A, 5007A lines are the brightest optical emissions in the jet and suggested a low radial velocity of about 100 km s−1

Type
I. Young Supernova Remnants
Information
Symposium - International Astronomical Union , Volume 101: Supernova Remnants and Their X-Ray Emission , 1983 , pp. 145 - 148
Copyright
Copyright © Reidel 1983 

References

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