A Doppler dimming determination of coronal outflow velocity
1993; IOP Publishing; Volume: 412; Linguagem: Inglês
10.1086/172930
ISSN1538-4357
AutoresL. Strachan, John L. Kohl, H. Weiser, G. L. Withbroe, R. H. Munro,
Tópico(s)Stellar, planetary, and galactic studies
Resumoview Abstract Citations (57) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A Doppler Dimming Determination of Coronal Outflow Velocity Strachan, Leonard ; Kohl, John L. ; Weiser, Heinz ; Withbroe, George L. ; Munro, Richard H. Abstract Outflow velocities in a polar coronal hole are derived from observations made during a 1982 sounding rocket flight. The velocity results are derived from a Doppler dimming analysis of resonantly scattered H I Ly-alpha. This analysis indicates radial outflow velocities of 217 km/s at 2 solar radii from sun-center with an uncertainty range of 153 to 251 km/s at a confidence level of 67 percent. These results are best characterized as strong evidence for supersonic outflow within 2 solar radii of sun-center in a polar coronal hole. Several means for obtaining improved accuracy in future observations are discussed. Publication: The Astrophysical Journal Pub Date: July 1993 DOI: 10.1086/172930 Bibcode: 1993ApJ...412..410S Keywords: Coronal Holes; Dimming; Doppler Effect; Sounding Rockets; Astronomical Models; Chromosphere; Coronagraphs; Flow Velocity; Lyman Alpha Radiation; Particle Emission; Radial Velocity; Solar Physics; SUN: CORONA; SUN: SOLAR WIND; SUN: PARTICLE EMISSION; SUN: UV RADIATION full text sources ADS |
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