Energy of Tycho's supernova remnant is increasing with time.
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.
Barenblatt
Grigory Isaakovich
GI
Department of Mathematics, University of California, Berkeley, CA 94720, USA. gibarenblatt@lbl.gov