Energy of Tycho's supernova remnant is increasing with time.

Barenblatt, Grigory Isaakovich · Proc Natl Acad Sci U S A · 2008

basic_science · Level V

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Abstract

It is shown, using the Zeldovich integral relations, that the energy of Tycho's Supernova Remnant is strongly growing with time, approximately as t(1/3). This growth can be attributed to the exothermic reactions going inside the remnant. The use of the assumption of the adiabaticity of the motion inside of the shock front, and no losses or gain of energy at the front, seems therefore unjustified.