Photospheric and coronal magnetic fields

Conference · Tue Jan 01 00:00:00 EST 1991 · Reviews of Geophysics and Space Physics; (United States)

OSTI ID:5030606

Sheeley, Jr, N R ^[1]

---

1. USAF, Geophysics Laboratory, Hanscom AFB, MA (United States)

Research on small-scale and large-scale photospheric and coronal magnetic fields during 1987-1990 is reviewed, focusing on observational studies. Particular attention is given to the new techniques, which include the correlation tracking of granules, the use of highly Zeeman-sensitive infrared spectral lines and multiple lines to deduce small-scale field strength, the application of long integration times coupled with good seeing conditions to study weak fields, and the use of high-resolution CCD detectors together with computer image-processing techniques to obtain images with unsurpassed spatial resolution. Synoptic observations of large-scale fields during the sunspot cycle are also discussed. 101 refs.

• OSTI ID: 5030606
• Report Number(s): CONF-910878-; CODEN: RGPSB
• Journal Information: Reviews of Geophysics and Space Physics; (United States), Vol. 29; Conference: 20. general assembly of the International Union of Geodesy and Geophysics (IUGG), Vienna (Austria), 11-24 Aug 1991; Related Information: Shea, M. A; ISSN 0034-6853
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
PHOTOSPHERE
MAGNETIC FIELDS
SOLAR CORONA
CHARGE-COUPLED DEVICES
CORRELATIONS
INFRARED SPECTRA
RESEARCH PROGRAMS
SOLAR GRANULATION
SPATIAL RESOLUTION
SUNSPOTS
USA
ATMOSPHERES
DEVELOPED COUNTRIES
NORTH AMERICA
RESOLUTION
SEMICONDUCTOR DEVICES
SOLAR ACTIVITY
SOLAR ATMOSPHERE
SPECTRA
STARSPOTS
STELLAR ACTIVITY
STELLAR ATMOSPHERES
STELLAR CORONAE
640104* - Astrophysics & Cosmology- Solar Phenomena