On the retrieval of velocity gradients from photospheric line asymmetries - A linearized approach

Details On the retrieval of velocity gradients from photospheric line asymmetries - A linearized approach On the retrieval of velocity gradients from photospheric line asymmetries - A linearized approach

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....83...73c&link_type=abstract

Astronomy and Astrophysics, vol. 83, no. 1-2, Mar. 1980, p. 73-78. Research supported by the Consiglio Nazionale delle Ricerche

Astronomy and Astrophysics

Astrophysics

6

Fraunhofer Lines, Photosphere, Solar Spectra, Asymmetry, Atmospheric Models, Linearization, Velocity Distribution

Scientific paper

The first-order effects of a velocity field on the asymmetry of Fraunhofer lines are analyzed and a method for recovering the velocity gradient from the observed asymmetries is described. The method - which does not require the concept of formation depth - is applied to the inversion of synthetic data; the results obtained show that it has the properties of stability and sensitivity necessary for working in practice within a fairly large range of photospheric velocities (up to the order of the Doppler width of the lines).

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