The development and structure of bright active regions at 2.8 cm

The development of three intense active centers during their appearance on the solar disk is examined by using high-resolution observations at 2.8 cm. Each region shows a bright component with brightness temperature >10 super(6) K and size smaller than 20". The development of the bright comp...

Full description

Saved in:
Bibliographic Details
Published inSolar physics Vol. 56; no. 2; pp. 335 - 350
Main Authors Falchi, A.Donati, Felli, M., Pampaloni, P., Tofani, G.
Format Journal Article
LanguageEnglish
Published 01.02.1978
Online AccessGet full text

Cover

More Information
Summary:The development of three intense active centers during their appearance on the solar disk is examined by using high-resolution observations at 2.8 cm. Each region shows a bright component with brightness temperature >10 super(6) K and size smaller than 20". The development of the bright components were investigated on different time scales. Intensity fluctuations on a time scale of minutes are within the instrumental accuracy, whereas the evolution over periods of days shows a variation of the flux density to 30-40% per day. The problem of the bright core height is discussed. Heights within 10 x 10 super(3) and 40 x 10 super(3) km are found by using their apparent displacement on the disk.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0038-0938
1573-093X
DOI:10.1007/BF00152475