HELIOSEISMIC TESTS OF THE NEW LOS ALAMOS OPACITIES

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We compare the helioseismic properties of two solar models, one calibrated with the OPAL opacities and the other with the recent Los Alamos LEDCOP opacities. We show that, in the radiative interior of the Sun, the small differences between the two sets of opacities (up to 6% near the base of the convection zone) lead to noticeable differences in the solar structure (up to 0.4% in sound speed), with the OPAL model being the closest to the helioseismic data. More than half of the difference between the two opacity sets results from the interpolation scheme and from the relatively widely ... continued below

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304 Kilobytes pages

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GUZIK, J. & AL, ET January 1, 2001.

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We compare the helioseismic properties of two solar models, one calibrated with the OPAL opacities and the other with the recent Los Alamos LEDCOP opacities. We show that, in the radiative interior of the Sun, the small differences between the two sets of opacities (up to 6% near the base of the convection zone) lead to noticeable differences in the solar structure (up to 0.4% in sound speed), with the OPAL model being the closest to the helioseismic data. More than half of the difference between the two opacity sets results from the interpolation scheme and from the relatively widely spaced temperature grids used in the tables. The remaining 3% intrinsic difference between the OPAL and the LEDCOP opacities in the radiative interior of the Sun is well within the error bars on the opacity calculations resulting from the uncertainties on the physics. We conclude that the OPAL and LEDCOP opacity sets do about as well in the radiative interior of the Sun.

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304 Kilobytes pages

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  • Report No.: LA-UR-01-352
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 773604
  • Archival Resource Key: ark:/67531/metadc725012

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  • January 1, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • March 21, 2016, 8:04 p.m.

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GUZIK, J. & AL, ET. HELIOSEISMIC TESTS OF THE NEW LOS ALAMOS OPACITIES, article, January 1, 2001; New Mexico. (digital.library.unt.edu/ark:/67531/metadc725012/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.