Line-of-sight effects on spectroscopic measurements in the inner solar wind region

Journal Article · Thu Jun 01 04:00:00 EDT 1989 · Journal of Geophysical Research; (USA)

DOI:https://doi.org/10.1029/JA094iA06p06886· OSTI ID:5919136

Esser, R; Withbroe, G L ^[1]

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1. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (USA)

The effect of the integration along the line of sight on the spectral line profiles of the resonantly scattered Lyman alpha radiation emitted by low-density coronal holes at heights above 1.5 R{sub S} from Sun center is investigated. It is shown how the spectral lines from this region are influenced by the Lyman alpha emission from surrounding regions with higher densities. The coronal hole and the surrounding areas are described by a two-fluid solar wind model. It is shown that the line-of-sight effects can be important for the interpretation of the Lyman alpha spectral line measurements in the outer corona and inner solar wind.

• OSTI ID: 5919136
• Journal Information: Journal of Geophysical Research; (USA), Journal Name: Journal of Geophysical Research; (USA) Vol. 94:A6; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
ATMOSPHERES
DATA ANALYSIS
HEATING
LYMAN LINES
MAIN SEQUENCE STARS
MATHEMATICAL MODELS
PLASMA HEATING
SCATTERING
SOLAR ACTIVITY
SOLAR CORONA
SOLAR WIND
SPECTROSCOPY
STARS
STELLAR ATMOSPHERES
STELLAR CORONAE
SUN