Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...472..267l&link_type=abstract
Astrophysical Journal v.472, p.267
Astronomy and Astrophysics
Astronomy
91
Atomic Processes, Ism: Supernova Remnants, Shock Waves, Ism: Individual Alphanumeric: Sn 1006
Scientific paper
The ultraviolet spectrum of SN 1006 observed by the Hopkins Ultraviolet Telescope (HUT) is modeled to infer the degree of electron-ion equilibration at the nonradiative shocks in the remnant. Such an approach is possible since the spectrum has lines (He II 1640) whose excitation is dominated by electrons, and others (C IV λ1550, N V λ1240, O VI λ1036) in which protons and other ions are more important, and the intensity ratio between these is sensitive to the electron-ion temperature ratio. We find substantially less than full equilibration, marginally consistent with existing plasma simulations but rather more suggestive of even lower equilibration than these studies would predict The more stringent limits on the electron temperature resulting from this allow a more accurate determination of the distance to SN 1006. Our result is 1.8±0.3 kpc.
Blair William Patrick
Laming Martin J.
McLaughlin Brendan M.
Raymond John C.
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