2026-09-20T16:41:19Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/85170 2023-07-11 col_2142_5131 col_2142_14807 com_2142_5130 com_2142_14806 com_2142_8903

Mihalas, Dimitri Frazin, Richard Alan 2015-09-25T22:35:35Z 2015-09-25T22:35:35Z 10000-01-01 2002 2002 As part of an effort to understand how the solar wind is energized, the so-determined electron density is used to interpret O VI lambda1032, 1037 A spectra taken with UVCS. The spectra are interpreted in terms of empirical constraints on the O5+ ion velocity distributions and outflow speeds. Four conclusions result from this work: (1) our analysis shows O5+ velocity distribution anisotropy in the streamer legs and stalk and also shows that the microscopic velocity distribution (which excludes wave motions that equally affect all charged particles) is anisotropic, where the most probable speed perpendicular to the magnetic field direction exceeds that in the parallel direction; (2) there is preferential heating of the O5+ ions over the protons in the streamer stalk and legs; (3) there is no evidence for preferential O5+ heating in the core; (4) the outflow velocity of the O5+ ions is determined at heights above 4.6 R⊙ . All results have a confidence level of at least 70%. Made available in DSpace on 2015-09-25T22:35:35Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3044089.pdf: 10171469 bytes, checksum: 1fefbd5fb2a89b89721bb34347c9e095 (MD5) Previous issue date: 2002 Embargo set by: Seth Robbins for item 86451 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 199 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2002. http://hdl.handle.net/2142/85170 (MiAaPQ)AAI3044089 eng Physics, Astronomy and Astrophysics Empirical Constraints on O(5+) Outflows and Velocity Distributions in a Solar-Minimum Coronal Streamer text Astronomy Astronomy University of Illinois at Urbana-Champaign Dissertation Ph.D.