Physics
Scientific paper
Mar 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.427..257a&link_type=abstract
The Universe as Seen by ISO. Eds. P. Cox & M. F. Kessler. ESA-SP 427., p. 257
Physics
6
Cataclysmic Variable, Radio Flare
Scientific paper
AE Aquarii is a unique Magnetic Cataclysmic Variable showing flaring activity in all energy ranges. Its radio flares (λ = 3.4 mm-21 cm) show similarities with the X-ray binary Cygnus X-3, but remain puzzling. AE Aqr's radio flares are attributed to the optically thick synchrotron radiation from expanding plasma clouds (Bastian, Dulk & Chanmugam 1988, hereafter BDC): the observed time-averaged radio flux density increases with frequency (from 21 cm to 761 μm). We have detected AE Aqr at 90 μm at the 3-σ level using ISOPHOT, and we have estimated the upper limit to its flux density at 160 μm. The result is consistent with BDC's model: either as the continuation of the optically thick synchrotron radio spectrum, or as its turnover frequency. However we cannot firmly exclude that the 90 μm flux corresponds to the optically thin part of the synchrotron spectrum. Using BDC's model and various observational measurements, the initial size and magnetic field intensity of a single plasmoid are therefore constrained.
Abada-Simon Meil
Aubier M.
Barrett Paul
de Jager O.
de Martino Domitilla
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