Electron density fluctuations in the local interstellar bubble

Details Electron density fluctuations in the local interstellar bubble Electron density fluctuations in the local interstellar bubble

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.360..137p&link_type=abstract

Nature (ISSN 0028-0836), vol. 360, no. 6400, p. 137-139.

Physics

40

Bubbles, Electron Density (Concentration), Interstellar Gas, Plasma Turbulence, Solar Neighborhood, Scintillation, X Ray Sources

Scientific paper

To probe turbulence in the local interstellar medium, scintillation measurements were made at 50 MHz of emission from the nearby pulsar 0950+08, which happens to lie near the edge of the local bubble. The scintillation bandwidth is used to deduce the amplitude of the electron-density fluctuation spectrum in the coronal gas alone; the amplitude is found to be an order of magnitude lower than for any previously measured interstellar line of sight. It is concluded that the interior of the bubble is relatively quiescent and that high levels of plasma turbulence, if they exist, must be localized to the cavity boundary.

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