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X-ray, Optical and UV Observations of the Young Supernova Remnant in the Irregular Galaxy NGC 4449

Published online by Cambridge University Press:  04 August 2017

W. P. Blair ,
R. P. Kirshner ,
P. F. Winkler Jr. ,
J. C. Raymond ,
R. A. Fesen  and
T. R. Gull
W. P. Blair
Affiliation:
Harvard-Smithsonian Center for Astrophysics
R. P. Kirshner
Affiliation:
Department of Astronomy, The University of Michigan
P. F. Winkler Jr.
Affiliation:
Department of Physics, Middlebury College
J. C. Raymond
Affiliation:
Harvard-Smithsonian Center for Astrophysics
R. A. Fesen
Affiliation:
Laboratory for Solar and Stellar Physics, NASA Goddard Spaceflight Center
T. R. Gull
Affiliation:
Laboratory for Solar and Stellar Physics, NASA Goddard Spaceflight Center

Abstract

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A powerful young supernova remnant (SNR) similar to Cas A has recently been discovered in the irregular galaxy NGC 4449. We have obtained X-ray, optical and ultraviolet data which allow us to investigate possible models for this object and estimate its age. Several lines of argument indicate a massive star of order 25 M⊙ as the precursor to this remnant. If the x-ray emission is attributed to a reverse shock in the ejecta, the remnant should be ∼ 120 years old.

Type
VI. Supernova Remnants in Other Galaxies
Information
Symposium - International Astronomical Union , Volume 101: Supernova Remnants and Their X-Ray Emission , 1983 , pp. 579 - 582
Copyright
Copyright © Reidel 1983 

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