Coronal transients in FE XIV 5303A: first two-dimensional photoelectric ground-based observations

Technical Report · Tue Nov 01 04:00:00 EST 1983

OSTI ID:6624397

Altrock, R C; Demastus, H L

An observational program was undertaken at Sacramento Peak Observatory to photoelectrically detect coronal transients. Continuous observations are made in the Fe XIV 5303A green line, utilizing the 40 cm coronagraph and the Photoelectric Coronal Photometer. Scans at three heights above the limb are combined to form a low resolution picture of the greenline corona every 20 to 30 minutes. Difference pictures, relative to an initial scan, are generated to search for sudden changes in the corona. The first few days of operation of this program have yielded three low-lying events ( 1.55 solar radii) following minor chromospheric activity (a surge and eruptive prominences), which propagated up through the corona with velocities on the order of 100 km/s.

• Research Organization: Sacramento Peak Observatory, Sunspot, NM (USA)
• OSTI ID: 6624397
• Report Number(s): N-84-13072
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
CHROMOSPHERE
ELECTRON EMISSION
EMISSION
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
PHOTOELECTRIC EMISSION
PHOTOMETERS
SOLAR ATMOSPHERE
SOLAR CORONA
STELLAR ATMOSPHERES
STELLAR CORONAE
WAVE PROPAGATION