Preliminary results from the oribiting solar observatory 8: Velocities in the solar chromosphere observed in the Si II lambda1816 line

Journal Article · Wed Dec 01 00:00:00 EST 1976 · Astrophys. J., Lett.; (United States)

DOI:https://doi.org/10.1086/182313· OSTI ID:7134914

Chipman, E G; Bruner, Jr, E C; Shine, R A; Lites, B W; Rottman, G J; Athay, R G; White, O R

The University of Colorado instrument on OSO-8 was used to measure repeated line profiles of the Si II lambda1816 line over quiet and active areas of approximately 20'' by 5'' during entire orbits of 60 minutes. Velocity oscillations with periods near 300 s are observed in approximately half of the time series, and periods near 180 s are sometimes observed. Periodic intensity variations are also observed at both of these periods. For both periods, the intensity leads the velocity in phase by approximately 30degree. (AIP)

• Research Organization: Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder
• OSTI ID: 7134914
• Journal Information: Astrophys. J., Lett.; (United States), Vol. 210:2
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHROMOSPHERE
VARIATIONS
VELOCITY
SILICON IONS
EMISSION SPECTRA
ENERGY SPECTRA
LINE WIDTHS
OSCILLATIONS
SOLAR ACTIVITY
SOLAR ATMOSPHERE
ATMOSPHERES
ATOMIC IONS
CHARGED PARTICLES
IONS
SPECTRA
640104* - Astrophysics & Cosmology- Solar Phenomena