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3C58’s Filamentary Radial Velocities, Line Intensities, and Proper Motions

Published online by Cambridge University Press:  12 April 2016

R.A. Fesen ,
R.P. Kirshner  and
R.H. Becker
R.A. Fesen
Affiliation:
CASA, University of Colorado, Boulder CO
R.P. Kirshner
Affiliation:
Center for Astrophysics, Cambridge, MA
R.H. Becker
Affiliation:
Dept. of Physics, UC Davis, Davis, CA

Abstract

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Optical spectroscopy on nearly 50 filaments of 3C58 indicates a maximum expansion velocity of 1100 ± 100 km s−1. A considerable range in radial velocity with projected distance from remnant center is found suggesting that the remnant’s optical emission is not confined to a thin shell. Typical filament electron densities are between 200 - 500 cm−3 with Hα/[N II] ratios in the range 0.2 - 0.5. Optical extinction to 3C58 is modest with E[B-V] = 0.68±0.08. Preliminary radial proper motion measurements for a few outlying filaments suggest values of order 0.05” - 0.07” yr−1.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 101: Supernova Remnants and the Interstellar Medium , 1988 , pp. 55 - 58
Copyright
Copyright © Cambridge University Press 1988

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