Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.240..573d&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 240, Oct. 1, 1989, p. 573-590. Research supported by FA
Astronomy and Astrophysics
Astronomy
14
Crab Nebula, Synchrotron Radiation, Thermal Instability, Filaments, Magnetic Field Configurations, Two Dimensional Models
Scientific paper
Previous work on thermal synchrotron instability (TSI) in the Crab Nebula has been extended, taking into account recent observational data, the expansion and past history of the Crab Nebula, and nonlinear effects. Two models are explored: (1) a two-dimensional expansion model in which the filaments of the Crab Nebula are formed by TSI in an expanding spherical shell with an average radial velocity; and (2) a three-dimensional expansion model in which the filaments are formed in an ejected cloud which expands isotropically and which has an arbitrary magnetic field orientation. Difficulty is found in forming filaments by TSI if the product of the ambient expanding volume and the ambient magnetic field of the plamsa increases rapidly as a function of R(t).
de Gouveia dal Pino Elisabete M.
Opher Reuven
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