A Hydrostatic Model of a Typical Umbral Core of Sunspots

Details A Hydrostatic Model of a Typical Umbral Core of Sunspots A Hydrostatic Model of a Typical Umbral Core of Sunspots

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jkas...11...37y&link_type=abstract

Journal of the Korean Astronomical Society, vol. 11, no. 1, p. 37-46

Astronomy and Astrophysics

Astronomy

2

Scientific paper

A hydrostatic model atmosphere of a typical umbral core is constructed on the basis of both NA I D2 line profile and umbral core-to disk continuum intensity ratio. The observation were obtained by Mullan and Wyller with photoelectric means over the range from 4000 Angstrom and 6500 Angstrom. The computed line profile of NA I D2 and the emergent continuum intensity distribution are compared with the observations. The temperature of umbral cores is found to be lower by 300K to 500K than that of their ambient umbral region. The detailed physical structure of a working model of umbral cores is proposed.

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