One- and multi-component models of the upper photosphere based on molecular spectra

✍ Scribed by George H. Mount; Jeffrey L. Linsky; Richard A. Shine

• Publisher: Springer
• Year: 1973
• Tongue: English
• Weight: 884 KB
• Volume: 32
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00152726

✦ Synopsis

Spectroheliograms taken in the CN(0, 0) violet band near 23883 A, show very small scale network and cell structures with high contrast. The bandhead itself, which is a broad feature due to overlap of several CN lines, allows the diagnostic simplicity of a continuum since motions, magnetic fields, and broadening mechanisms are unimportant. We have obtained spectroheliograms in the bandhead and center-to-limb photoelectric spectra of CN(0, 0) at Kitt Peak National Observatory. From the photoelectric spectra and a detailed analysis of the formation of the CN(0, 0) spectrum we derive a best-fit one-component upper photospheric model differing from that of the HSRA and recommend a change in solar carbon abundance from the HSRA value of logA~ = 8.55 to logAc = 8.25. From the calibrated spectroheliograms we consider a multi-component model to account for the observed fine structure intensity variations.