Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...397..534a&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 397, no. 2, p. 534-536.
Astronomy and Astrophysics
Astronomy
11
Binary Stars, Planetary Nebulae, X Ray Stars, Astronomical Models, Exosat Satellite, Spaceborne Astronomy
Scientific paper
Einstein and EXOSAT satellite observations of X-ray emission from the planetary nebulae A63 and LoTr 5 are reviewed. Both of these systems contain binary central stars. No flux was detected from A63 (central star UU Sge). LoTr 5 (central star IN Com) is a previously unreported X-ray emitter; it showed no statistically significant X-ray variability. Three models for the source of the X-ray emission in such systems are considered in the light of these and previous results.
Apparao Krishna M. V.
Berthiaume Gregory David
Nousek John A.
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