Böning, V. G. A.; Birch, A.; Gizon, L.; Duvall, T.: Helioseismological determination of the subsurface spatial spectrum of solar convection: Demonstration using numerical simulations. Astronomy and Astrophysics 649, A59 (2021)
Hanson, C. S.; Duvall, T.; Birch, A.; Gizon, L.; Sreenivasan, K. R.: Solar east-west flow correlations that persist for months at low latitudes are dominated by active region inflows. Astronomy and Astrophysics 644, A103 (2020)
Liang, Z.-C.; Gizon, L.; Birch, A.; Duvall, T.; Rajaguru, S. P.: Solar meridional circulation from twenty-one years of SOHO/MDI and SDO/HMI observations: Helioseismic travel times and forward modeling in the ray approximation. Astronomy and Astrophysics 619, A99 (2018)
Liang, Z.-C.; Birch, A. C.; Duvall, T.; Gizon, L.; Schou, J.: Comparison of acoustic travel-time measurements of solar meridional circulation from SDO/HMI and SOHO/MDI. Astronomy and Astrophysics 601, A46 (2017)
Couvidat, S.; Schou, J.; Hoeksema, J. T.; Bogart, R. S.; Bush, R. I.; Duvall, T. L.; Liu, Y.; Norton, A. A.; Scherrer, P. H.: Observables processing for the Helioseismic and Magnetic Imager instrument on the Solar Dynamics Observatory. Solar Physics 291, pp. 1887 - 1938 (2016)
Schad, A.; Jouve, L.; Duvall, T.; Roth, M.; Vorontsov, S.: Recent developments in helioseismic analysis methods and solar data assimilation. Space Science Reviews 196, pp. 221 - 249 (2015)
Duvall, T.: Flows in the convection zone with potential relevance to the sunspot problem. Sunspot formation: theory, simulations and observations, Stockholm, Sweden (2015)
Duvall, T.: Flows in the convection zone with particular relevant to the dynamo. NASA LWS Workshop on Solar Dynamo Frontiers: Helioseismology, 3D Modeling, and Data Assimilation, Boulder, Colorado, USA (2015)
Poulier, P.-L.; Gizon, L.; Fournier, D.; Duvall, T.: On the validity of the frozen-in approximation for acoustic wave propagation through solar granulation. XXXth General Assembly of the International Astronomical Union, Vienna, Austria (2019)
Nagashima, K.; Duvall, T.; Birch, A. C.; Gizon, L.: Comparison between time-distance and ring-diagram helioseismology measurements of subsurface convective flows. Annual Meeting of the Astronomische Gesellschaft 2017, Göttingen, Germany (2017)
The Planetary Plasma Environments group (PPE) has a strong heritage in the exploration of planetary magnetospheres and space plasma interactions throughout the solar system. It has contributed instruments to several past missions that flew-by or orbited Jupiter (Galileo, Cassini, Ulysses). The PPE participates in the JUICE mission by contributing hardware and scientific expertise to the Particle Environment Package (PEP).
Analyzing the high spatial resolution solar Ca II H and K emission data obtained by the SUNRISE mission and building a model of other stars more active than the Sun
The magnetic field in the solar atmosphere exceeds the geomagnetic field strength by four orders of magnitude. It greatly influences the processes of energy transport within the solar atmosphere, and dominates the morphology of the solar chromosphere and corona. Kinetic energy from convective motions in the Sun can be efficiently stored in magnetic fields and subsequently released - to heat the solar corona to several million degrees or to blast off coronal mass ejections.