Spectropolarimetry of Venus and Jupiter clouds - Information content of equivalent widths

Details Spectropolarimetry of Venus and Jupiter clouds - Information content of equivalent widths Spectropolarimetry of Venus and Jupiter clouds - Information content of equivalent widths

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....79..287b&link_type=abstract

Astronomy and Astrophysics, vol. 79, no. 3, Nov. 1979, p. 287-298.

Astronomy and Astrophysics

Astrophysics

4

Absorption Spectra, Astronomical Spectroscopy, Jupiter Atmosphere, Polarimetry, Venus Clouds, Atmospheric Scattering, Distribution Functions, Width

Scientific paper

The theory of the curve-of-growth for absorption lines formed in an anisotropically scattering medium, particularly the clouds of Venus and Jupiter, is generalized to the case of polarization. When the photon path-length distributions associated with each of Stokes' parameters (Il, Ir, and Q) are evaluated using Pade's approximations, analytical expressions can be derived for the corresponding equivalent widths. It is found that spectra of Q, derivable from the rotational temperature of the Q-lines, are formed at a level closer to the cloud top than the photopolarimetric level, rendering a more accurate location of the cloud top than possible by photopolarization. It is also demonstrated that simultaneous measurements of the equivalent widths of strong I- and Q-lines can provide analytical relations for retrieving the scale-height ratios of ambient gas-to-cloud particles and minor constituent-to-ambient gas molecules without resorting to any other independent measurement.

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