Physical Conditions in the Solar Limb Prominence Observed at the 1952 Eclipse.
1957; IOP Publishing; Volume: 126; Linguagem: Inglês
10.1086/146382
ISSN1538-4357
Autores Tópico(s)History and Developments in Astronomy
Resumoview Abstract Citations (17) References (14) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Physical Conditions in the Solar Limb Prominence Observed at the 1952 Eclipse. Athay, R. G. ; Orrall, Frank Q. Abstract At the time of the 1952 eclipse a small, rather faint, prominence was located near the equator on the west solar limb. Redman and Zanstra (1952) have previously discussed the continuous spectrum of this prominence, and in this paper we discuss the line spectrum. By combining the line data with the continuum data, we arrive at the following conclusions: (1) the optical thickness of the central part of the prominence in the center of Ha is less than or near unity, and none of the observed hydrogen- and heliumline intensities are seriously affected by self-absorption; (2) the hydrogen energy levels and the helium triplet energy levels are overpopulated relative to the thermodynamic equilibrium populations at T4 (3) helium is predominantly singly ionized; (4) T is near 20000 and fle >- 1011; and (5) the prominence is in a steady state, with its radiated energy balanced by an external energy supply. Publication: The Astrophysical Journal Pub Date: July 1957 DOI: 10.1086/146382 Bibcode: 1957ApJ...126..167A full text sources ADS |
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