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J/A+A/504/259       Polarization models for planets             (Buenzli+, 2009)

A grid of polarization models for Rayleigh scattering planetary atmospheres. Buenzli E., Schmid H.M. <Astron. Astrophys. 504, 259 (2009)> =2009A&A...504..259B
ADC_Keywords: Polarization ; Models, atmosphere Keywords: polarization - scattering - techniques: polarimetric - planetary systems - planets and satellites: general Abstract: Reflected light from giant planets is polarized by scattering, offering the possibility of investigating atmospheric properties with polarimetry. Polarimetric measurements are available for the atmospheres of solar system planets, and instruments are being developed to detect and study the polarimetric properties of extrasolar planets. We investigate the intensity and polarization of reflected light from planets in a systematic way with a grid of model calculations. Comparison of the results with existing and future observations can be used to constrain parameters of planetary atmospheres. Description: This table presents phase curves of intensity I and polarized intensity Q for the reflected light from homogeneous, Rayleigh scattering planetary atmospheres, calculated with a Monte Carlo scattering code. The atmosphere is described by three parameters: single scattering albedo, optical depth of scattering layer, albedo of a Lambert surface underneath. Results are disk-integrated and provided for phase angles 7.5-172.5°. Additionally the geometric albedo I(0), the disk integrated radial polarized intensity Qr(0) and the spherical albedo are given. Intensities are normalized to the reflection from a white Lambertian disk. For calculations the number of photons was chosen such that Delta(Q/I)<0.1% and Delta(I)/I<0.07%, for phase angles <130°. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 619 333 Intensity and polarized intensity phase curve for the reflected light from homogeneous, Rayleigh scattering planetary atmospheres
Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 5 F5.2 --- tausc Optical depth of scattering layer (1) 8- 11 F4.2 --- omega Single scattering albedo 14- 16 F3.1 --- AS Albedo of Lambertian surface 19- 24 F6.4 --- Asp Spherical albedo 27- 32 F6.4 --- I(0) Geometric albedo 34- 41 F8.5 --- Qr(0) Radial polarized intensity 44- 49 F6.4 --- I(7.5) Intensity at phase angle 7.5° 52- 57 F6.4 --- I(12.5) Intensity at phase angle 12.5° 60- 65 F6.4 --- I(17.5) Intensity at phase angle 17.5° 68- 73 F6.4 --- I(22.5) Intensity at phase angle 22.5° 76- 81 F6.4 --- I(27.5) Intensity at phase angle 27.5° 84- 89 F6.4 --- I(32.5) Intensity at phase angle 32.5° 92- 97 F6.4 --- I(37.5) Intensity at phase angle 37.5° 100-105 F6.4 --- I(42.5) Intensity at phase angle 42.5° 108-113 F6.4 --- I(47.5) Intensity at phase angle 47.5° 116-121 F6.4 --- I(52.5) Intensity at phase angle 52.5° 124-129 F6.4 --- I(57.5) Intensity at phase angle 57.5° 132-137 F6.4 --- I(62.5) Intensity at phase angle 62.5° 140-145 F6.4 --- I(67.5) Intensity at phase angle 67.5° 148-153 F6.4 --- I(72.5) Intensity at phase angle 72.5° 156-161 F6.4 --- I(77.5) Intensity at phase angle 77.5° 164-169 F6.4 --- I(82.5) Intensity at phase angle 82.5° 172-177 F6.4 --- I(87.5) Intensity at phase angle 87.5° 180-185 F6.4 --- I(92.5) Intensity at phase angle 92.5° 188-193 F6.4 --- I(97.5) Intensity at phase angle 97.5° 196-201 F6.4 --- I(102.5) Intensity at phase angle 102.5° 204-209 F6.4 --- I(107.5) Intensity at phase angle 107.5° 212-217 F6.4 --- I(112.5) Intensity at phase angle 112.5° 220-225 F6.4 --- I(117.5) Intensity at phase angle 117.5° 228-233 F6.4 --- I(122.5) Intensity at phase angle 122.5° 236-241 F6.4 --- I(127.5) Intensity at phase angle 127.5° 244-249 F6.4 --- I(132.5) Intensity at phase angle 132.5° 252-257 F6.4 --- I(137.5) Intensity at phase angle 137.5° 260-265 F6.4 --- I(142.5) Intensity at phase angle 142.5° 268-273 F6.4 --- I(147.5) Intensity at phase angle 147.5° 276-281 F6.4 --- I(152.5) Intensity at phase angle 152.5° 284-289 F6.4 --- I(157.5) Intensity at phase angle 157.5° 292-297 F6.4 --- I(162.5) Intensity at phase angle 162.5° 300-305 F6.4 --- I(167.5) Intensity at phase angle 167.5° 308-313 F6.4 --- I(172.5) Intensity at phase angle 172.5° 315-322 F8.5 --- Q(7.5) Polarized intensity at phase angle 7.5° 325-331 F7.5 --- Q(12.5) Polarized intensity at phase angle 12.5° 334-340 F7.5 --- Q(17.5) Polarized intensity at phase angle 17.5° 343-349 F7.5 --- Q(22.5) Polarized intensity at phase angle 22.5° 352-358 F7.5 --- Q(27.5) Polarized intensity at phase angle 27.5° 361-367 F7.5 --- Q(32.5) Polarized intensity at phase angle 32.5° 370-376 F7.5 --- Q(37.5) Polarized intensity at phase angle 37.5° 379-385 F7.5 --- Q(42.5) Polarized intensity at phase angle 42.5° 388-394 F7.5 --- Q(47.5) Polarized intensity at phase angle 47.5° 397-403 F7.5 --- Q(52.5) Polarized intensity at phase angle 52.5° 406-412 F7.5 --- Q(57.5) Polarized intensity at phase angle 57.5° 415-421 F7.5 --- Q(62.5) Polarized intensity at phase angle 62.5° 424-430 F7.5 --- Q(67.5) Polarized intensity at phase angle 67.5° 433-439 F7.5 --- Q(72.5) Polarized intensity at phase angle 72.5° 442-448 F7.5 --- Q(77.5) Polarized intensity at phase angle 77.5° 451-457 F7.5 --- Q(82.5) Polarized intensity at phase angle 82.5° 460-466 F7.5 --- Q(87.5) Polarized intensity at phase angle 87.5° 469-475 F7.5 --- Q(92.5) Polarized intensity at phase angle 92.5° 478-484 F7.5 --- Q(97.5) Polarized intensity at phase angle 97.5° 487-493 F7.5 --- Q(102.5) Polarized intensity at phase angle 102.5° 496-502 F7.5 --- Q(107.5) Polarized intensity at phase angle 107.5° 505-511 F7.5 --- Q(112.5) Polarized intensity at phase angle 112.5° 514-520 F7.5 --- Q(117.5) Polarized intensity at phase angle 117.5° 523-529 F7.5 --- Q(122.5) Polarized intensity at phase angle 122.5° 532-538 F7.5 --- Q(127.5) Polarized intensity at phase angle 127.5° 541-547 F7.5 --- Q(132.5) Polarized intensity at phase angle 132.5° 550-556 F7.5 --- Q(137.5) Polarized intensity at phase angle 137.5° 559-565 F7.5 --- Q(142.5) Polarized intensity at phase angle 142.5° 568-574 F7.5 --- Q(147.5) Polarized intensity at phase angle 147.5° 577-583 F7.5 --- Q(152.5) Polarized intensity at phase angle 152.5° 586-592 F7.5 --- Q(157.5) Polarized intensity at phase angle 157.5° 594-601 F8.5 --- Q(162.5) Polarized intensity at phase angle 162.5° 603-610 F8.5 --- Q(167.5) Polarized intensity at phase angle 167.5° 612-619 F8.5 --- Q(172.5) Polarized intensity at phase angle 172.5°
Note (1): Instead of a model with τsc = 99 and ω = 1 we calculated the model with τsc = 30 to reduce computation time, but the results are equivalent.
Acknowledgements: Esther Buenzli, ebuenzli(at)astro.phys.ethz.ch
(End) E. Buenzli [ETH Zurich, Switzerland], P. Vannier [CDS] 09-Jul-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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