Validating Forward Modeling and Inversions of Helioseismic Holography Measurements
نویسندگان
چکیده
منابع مشابه
Equation of state and helioseismic inversions
Inversions to determine the squared isothermal sound speed and density within the Sun often use the helium abundance Y as the second parameter. This requires the explicit use of the equation of state (EOS), thus potentially leading to systematic errors in the results if the equations of state of the reference model and the Sun are not the same. We demonstrate how this potential error can be sup...
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Solar oscillation frequencies can be inverted to determine the internal structure of the Sun. Frequency diierences between a solar model and the Sun can be related to diierences in the structure by linearizing the oscillation equations. Thus, we can write : (1) (cf. Dziembowski et al. 1990). Here ! i is the difference in the frequency ! i of the ith mode between the solar data and a reference m...
متن کاملLetter to the Editor Equation of state and helioseismic inversions
Inversions to determine the squared isothermal sound speed anddensitywithin theSunoften use the heliumabundance Y as the second parameter. This requires the explicit use of the equation of state (EOS), thus potentially leading to systematic errors in the results if the equations of state of the reference model and the Sun are not the same. We demonstrate how this potential error can be suppress...
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We perform helioseismic holography on realistic solar convection simulations and compare the observed travel-time perturbations with the expected travel times from the horizontal flows in the simulations computed from forward models under the assumption of the Born approximation. We demonstrate reasonable agreement between the observed and model travel times which reinforces the validity of hel...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2018
ISSN: 1538-4357
DOI: 10.3847/1538-4357/aacffd