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Kinematics of Oxygen-Rich Filaments in Puppis A

Published online by Cambridge University Press:  12 April 2016

P. Frank Winkler ,
John H. Tuttle ,
Robert P. Kirshner  and
Michael J. Irwin
P. Frank Winkler
Affiliation:
Middlebury College, Middlebury, VT, U.S.A.
John H. Tuttle
Affiliation:
Middlebury College, Middlebury, VT, U.S.A.
Robert P. Kirshner
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, U.S.A.
Michael J. Irwin
Affiliation:
Institute of Astronomy, Cambridge University, Cambridge, U.K.

Abstract

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We have measured proper motions for fast, oxygen-rich knots in Puppis A, which we demonstrate are probably uncontaminated ejecta from the progenitor star’s core. Typical fast knots show motions of 0.1-0.2 arcsec yr-1 diverging from a point 4’ northeast of the center of the radio shell. A model assuming constant expansion fits the data well and gives an age of 3700 ± 300 yr for Puppis A. We also present new spectra which indicate the presence of neon along with oxygen in the fast knots.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 101: Supernova Remnants and the Interstellar Medium , 1988 , pp. 65 - 68
Copyright
Copyright © Cambridge University Press 1988

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