X-ray detection of Nova Herculis 1991 five days after optical outburst

Details X-ray detection of Nova Herculis 1991 five days after optical outburst X-ray detection of Nova Herculis 1991 five days after optical outburst

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.356..222l&link_type=abstract

Nature (ISSN 0028-0836), vol. 356, March 19, 1992, p. 222-224. Research supported by SERC.

Physics

48

Binary Stars, Bursts, Hercules Nova, Stellar Mass Ejection, X Ray Sources, Ejecta, Main Sequence Stars, Mass Transfer, Stellar Envelopes, Stellar Mass Accretion, White Dwarf Stars

Scientific paper

A positive detection by the Rosat satellite of X-ray emission from Nova Herculis 1991 five days after its optical discovery is reported. Standard nova models predict X-ray emission to arise directly from nuclear burning on the surface of the white dwarf, and it is suggested that X-rays should not be seen until late in the outburst. It is argued that the emission from Nova Her 1991 comes from hot shocked circumstellar material which may be the ejected material itself or preexisting circumstellar matter. In either case, however, the required density of material is higher than models of nova binary systems would suggest.

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