Accession Number : ADA118170

Title :   Annotated Atlas of H-alpha Synoptic Charts,


Personal Author(s) : McIntosh,P S

PDF Url : ADA118170

Report Date : Jul 1982

Pagination or Media Count : 337

Abstract : This volume presents a record of large-scale solar magnetic fields and solar activity during 130 solar rotations, from November 1964 through July 1974, in the form of H-alpha synoptic charts and accompanying descriptive notes. A new perspective on large-scale magnetic fields is provided by the inference of lines of polarity reversal from the systems of structures visible in H-alpha patrol filtergrams. These structures map the neutral lines in the radial component of solar magnetic fields (McIntosh, 1972a), thereby revealing details of the boundaries to large-scale magnetic fields that are not recorded in magnetograms sensitive to the longitudinal (line-of-sight) component of the fields. This atlas testifies that neutral lines are of themselves important physical features in solar activity. They are associated directly with systems of physical structures. They form continuous lines that often encircle the entire sun. They have lifetimes in excess of 2 years. The neutral-line patterns normally predate, and survive, the occurrence of important centers of sunspot and flare activity.

Descriptors :   *Solar activity, *Solar physics, Solar cycle, Charts, Solar flares, Alpha cross sections, Data displays

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE