@article{9bb1526fa8104ce791b5bc92928694f5,
title = "Sensitivity of helioseismic measurements of normal-mode coupling to flows and sound-speed perturbations",
abstract = "In this article, we derive and compute the sensitivity of measurements of coupling between normal modes of oscillation in the Sun to underlying flows. The theory is based on first-born perturbation theory, and the analysis is carried out using the formalism described by Lavely & Ritzwoller (1992). Albeit tedious, we detail the derivation and compute the sensitivity of specific pairs of coupled normal modes to anomalies in the interior. Indeed, these kernels are critical for the accurate inference of convective flow amplitudes and large-scale circulations in the solar interior.We resolve some inconsistencies in the derivation of Lavely & Ritzwoller (1992) and reformulate the fluid-continuity condition. We also derive and compute soundspeed kernels, paving the way for inverting for thermal anomalies alongside flows.",
keywords = "Hydrodynamics, Sun: helioseismology, Sun: interior, Sun: oscillations, Waves",
author = "Hanasoge, {Shravan M.} and Martin Woodard and Antia, {H. M.} and Laurent Gizon and Sreenivasan, {Katepalli R.}",
note = "Funding Information: We would like to thank I. Ferrero for providing the dIrr data points included in Fig. 4. This work was supported by the Science and Technology Facilities Council [grant number ST/F001166/1 and RF040218], the European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013)/ERC Grant agreement 278594-GasAroundGalaxies, the National Science Foundation under Grant No. PHYS-1066293, the Interuniversity Attraction Poles Programme of the Belgian Science Policy Office [AP P7/08 CHARM] and the hospitality of the Aspen Center for Physics. MF and TS acknowledge the Marie-Curie ITN CosmoComp, and MF also acknowledges the ERC Advanced Grant programme Dustygal. CSF acknowledges an ERC Advanced Investigator Grant COSMIWAY. This work used the DiRAC Data Centric system at Durham University, operated by the Institute for Computational Cosmology on behalf of the STFC DiRAC HPC Facility (www.dirac.ac.uk), and resources provided by WestGrid (www.westgrid.ca) and Compute Canada/Calcul Canada (www.computecanada.ca). The DiRAC system is funded by BIS National E-infrastructure capital grant ST/K00042X/1, STFC capital grant ST/H008519/1, STFC DiRAC Operations grant ST/K003267/1 and Durham University. DiRAC is part of the National E-Infrastructure. Funding Information: We would like to thank I. Ferrero for providing the dIrr data points included in Fig. 4. This work was supported by the Science and Technology Facilities Council [grant number ST/F001166/1 and RF040218], the European Research Council under the European Union{\textquoteright}s Seventh Framework Programme (FP7/2007-2013)/ERC Grant agreement 278594-GasAroundGalaxies, the National Science Foundation under Grant No. PHYS-1066293, the Interuniversity Attraction Poles Programme of the Belgian Science Policy Office [AP P7/08 CHARM] and the hospitality of the Aspen Center for Physics. MF and TS acknowledge the Marie-Curie ITN CosmoComp, and MF also acknowledges the ERC Advanced Grant programme Dustygal. CSF acknowledges an ERC Advanced Investigator Grant COSMIWAY. This work used the DiRAC Data Centric system at Durham University, operated by the Institute for Computational Cosmology on behalf of the STFC DiRAC HPC Facility (www.dirac.ac.uk), and resources provided by WestGrid (www.westgrid.ca) and Compute Canada/Calcul Canada (www.computecanada.ca). The DiRAC system is funded by BIS National E-infrastructure capital grant ST/K00042X/1, STFC capital grant ST/H008519/1, STFC DiRAC Operations grant ST/K003267/1 and Durham University. DiRAC is part of the National E-Infrastructure. Publisher Copyright: {\textcopyright} 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.",
year = "2017",
month = sep,
day = "11",
doi = "10.1093/mnras/stx1298",
language = "English (US)",
volume = "470",
pages = "1404--1420",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "2",
}