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)
First Light for Sunrise III: the first tests with real sunlight were successful. The balloon-borne solar observatory should be ready for launch at the end of May.
First icy cold, then midnight sun: at the Arctic Circle, the team will prepare the next flight of the balloon-borne solar observatory - and hopes for solar fireworks.
Astronomical teamwork: By combining data from Solar Orbiter and SDO, a group of researchers has unambiguously determined the magnetic field at the solar surface.
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.