Abstract
view Abstract Citations (17) References (28) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Emission-Line Polarization as an Equilibration Diagnostic for Nonradiative Shock Fronts Laming, J. M. Abstract The linear polarization in the H-alpha transition excited as neutral hydrogen diffuses through a nonradiative shock is calculated for varying shock velocities and degrees of electron-ion equilibration behind the shock front. This polarization arises from impact excitation by an anisotropic distribution of exciting particles, in this case electrons and protons, and is a function of the electron and proton temperatures. It is found that polarizations of up to 10 percent may be present for shock velocities of about 2000 km/s. For some of the cases considered here, line emission following proton impacts may be important, and the possibility of an atomic recoil associated with such an excitation is discussed. Publication: The Astrophysical Journal Pub Date: October 1990 DOI: 10.1086/169257 Bibcode: 1990ApJ...362..219L Keywords: Emission Spectra; H Alpha Line; Line Spectra; Linear Polarization; Shock Fronts; Supernova Remnants; Electron Energy; Electron-Ion Recombination; Neutral Gases; Proton Energy; Radiative Transfer; Astrophysics; NEBULAE: SUPERNOVA REMNANTS; POLARIZATION; RADIATIVE TRANSFER; SHOCK WAVES full text sources ADS | data products SIMBAD (3)
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