Abstract
The minimum emission measures observed in the directions toward pulsars or supernova remnants are inversely proportional to the pulsar or supernova remnant ages. It is concluded that the ionized gas in the vicinities of a number of pulsars and supernova remnants was formed during the first 1000 years after supernova explosions.
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Schedule a callMore From: Astronomical and Astrophysical Transactions, Vol. 33, No. 3
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