Emission of Lyman-alpha radiation by solar coronal loops. II - Filtergram analysis

Details Emission of Lyman-alpha radiation by solar coronal loops. II - Filtergram analysis Emission of Lyman-alpha radiation by solar coronal loops. II - Filtergram analysis

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...167..351t&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 167, Oct. 1986, p. 351-358.

Astronomy and Astrophysics

Astrophysics

8

Coronal Loops, Filtergrams, Lyman Alpha Radiation, Rocket-Borne Instruments, H Alpha Line, Magnetohydrodynamics, Mass Flow, Temperature Gradients

Scientific paper

The authors study active region loops, observed on Lα high resolution filtergrams obtained with a rocket borne instrument. Some formulae or diagrams are given for the computations of Lα and Hα intensities emitted by homogeneous loop models. The dimensions and emitted intensities of the observed loops being known, the authors determine the variations of temperature, pressure and density inside these objects under the assumption of constant temperature and hydrostatic equilibrium. The influence of temperature gradient and mass flow on the results is discussed, and an alternative model with radial temperature increase is envisaged. The case of an isolated loop with a larger diameter is also discussed.

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