Coronal observations from the soft X-ray telescope on Yohkoh

• Published in: Advances in space research Vol. 14; no. 4; pp. 3 - 11
• Main Authors: Strong, K.T., Team, Yohkoh
• Format: Journal Article
• Language: English
• Published: Legacy CDMS Elsevier Ltd 01.04.1994
• Subjects: Solar Physics
• ISSN: 0273-1177; 1879-1948
• DOI: 10.1016/0273-1177(94)90153-8

The Yohkoh payload includes a Soft X-ray Telescope (SXT) which is capable of taking high-resolution (2.5 arcsec) images of the Sun through several X-ray and optical filters. A CCD camera provides images with a low background, and large dynamic range and at a rapid cadence (>2 s), which enables the SXT to observe the effects of flares while continuing to observe the fainter quiet-Sun features. We present the observations from the SXT that illustrate how the faint coronal loops that make up the complex structure of the quiet Sun evolve on a variety of timescales from seconds to months. We describe a variety of coronal structures, such as coronal holes, bright points, the large-scale quiet coronal loops, and active regions, to show the wide range of opportunities that Yohkoh presents to further our understanding of the solar corona.