Research interests include astrophysical fluid dynamics with emphasis on convective dynamics and scale selection, turbulence, the excitation of the solar/stellar p-modes, and the origin of solar/stellar irradiance variations. Investigations range from studying highly simplified turbulent analogs based on point vortex motions to highly realistic simulations of radiative magnetohydrodynamics, spectral synthesis, and spectropolarimetric inversions. Served as instrument scientist for the Precision Solar Photometric Telescope (PSPT) at Mauna Loa Solar Observatory (MLSO) over its period of operation from 1999 to 2015, and currently lead the Critical Science Plan effort for the National Solar Observatory's (NSO's) upcoming 4m solar telescope, the Daniel K. Inouye Solar Telescope (DKIST).
ASTR 1040 - Accelerated Introductory Astronomy 2
Spring 2019 / Fall 2019
Covers principles of modern astronomy summarizing our present knowledge about the Sun, stars, birth and death of stars, neutron stars, black holes, galaxies, quasars, and the organization and origins of the universe. May require nighttime observing sessions at Sommers-Bausch Observatory. Required in ASTR major/minor. Includes a recitation. Taught at a higher intellectual level including a significant amount of quantitative analysis. Same as ASTR 1020 and ASTR 1200.
ASTR 3760 - Solar and Space Physics
Explores the physical processes linking the Sun and planets, emphasizing solar radiative and particulate variability and the response of planetary atmospheres and magnetospheres. Topics include the solar dynamo, solar wind, coronal mass ejections, cosmic ray modulation, magnetospheres, aurora, the space environment, and climate variability. Recommended prerequisite: PHYS 3310. Elective for APS major and minor.
ASTR 5540 - Mathematical Methods
Presents an applied mathematics course designed to provide the necessary analytical and numerical background for courses in astrophysics, plasma physics, fluid dynamics, electromagnetism, and radiation transfer. Topics include integration techniques, linear and nonlinear differential equations, WKB and Fourier transform methods, adiabatic invariants, partial differential equations, integral equations, and integrodifferential equations. Draws illustrative examples from the areas of physics listed above. Same as ATOC 5540.