Radio observations of the classical nova Cygni 92 eighty days after outburst

Details Radio observations of the classical nova Cygni 92 eighty days after outburst Radio observations of the classical nova Cygni 92 eighty days after outburst

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993natur.363..424p&link_type=abstract

Nature (ISSN 0028-0836), vol. 363, no. 6428, p. 424-426.

Astronomy and Astrophysics

Astronomy

21

Cataclysmic Variables, Novae, Radio Sources (Astronomy), Stellar Magnitude, Brightness Temperature, Flux Density, Radio Astronomy, Stellar Mass Ejection

Scientific paper

The detection of radio emission from several classical novae which is attributable to the thermal bremsstrahlung mechanism within an isothermal, expanding shell of ionized gas may serve as a direct probe of such shells during early stages of their evolution. Attention is presently given to radio observations of Cygni 92 by means of the MERLIN radiotelescope array; the shell was first resolved 80 days after the initial outburst, showing nonspherical expansion and thermal-electron temperatures which swiftly exceeded the expected value for a radiatively-excited hydrogen plasma. A model is proposed in which the gas is heated by thermonuclear process-generated shocks.

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