The coronal structure of active regions

Details The coronal structure of active regions The coronal structure of active regions

Sep 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...44...69l&link_type=abstract

Solar Physics, vol. 44, Sept. 1975, p. 69-82. Research supported by the Consiglio Nazionale delle Ricerche;

Astronomy and Astrophysics

Astronomy

22

Atmospheric Models, Atmospheric Pressure, Atmospheric Temperature, Solar Activity Effects, Solar Corona, Solar X-Rays, Astronomical Models, Normal Density Functions, Photography, Radiant Flux Density, Radiography, X Ray Astronomy

Scientific paper

A four-parameter model, which assumes a Gaussian dependence of both temperature and pressure on distance from center, is used to fit the compact part of coronal active regions as observed in X-ray photographs from a rocket experiment. The four parameters are the maximum temperature, the maximum pressure, the width of the pressure distribution, and the width of the temperature distribution. The maximum temperature ranges from 2.2 to 2.8 million K, and the maximum density from 2 to 9 by 10 to the 9th power per cu cm. The range of the pressure-distribution width is from 2 to 4 by 10 to the 9th power cm and that of the temperature-distribution width from 2 to 7.

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