Associate Professor, UA Astronomy
Associate Astronomer, Steward Observatory

Areas of Interest: Galactic Astronomy, Star Formation, Extragalactic Astronomy, Astrochemistry, Astrobiology

Dr. Shirley works on a variety of projects studying low-mass and high-mass star formation, the interstellar medium, and chemical evolution within our galaxy and nearby galaxies by combining observations with radiative transfer modeling. He specializes in radio and infrared imaging and spectroscopy utilizing single-dish radio telescopes, interferometers, and space-based observatories.

Director, Lunar and Planetary Laboratory
Department Head, Planetary Sciences
Professor, Lunar and Planetary Laboratory
Professor, Planetary Sciences
Professor, Geosciences

Dr. Swindle uses measurements of the noble gases in extraterrestrial materials (lunar samples and meteorites) to study the evolution of the solar system.

His research projects include using 40Ar-39Ar dating to determine the timing of impact events on the Moon and on asteroids, and studying Martian meteorites to understand the history of the Martian atmosphere and its interaction with surface materials. Past research projects have included using I-129, and its decay product Xe-129, to study the timing of the formation of the earliest solids in the solar nebula, and working on developing techniques to use instruments on spacecraft to measure ages of planetary surfaces in situ.

Director, Lunar and Planetary Laboratory
Department Head, Planetary Sciences
Professor, Lunar and Planetary Laboratory
Professor, Planetary Sciences
Professor, Geosciences

Dr. Swindle uses measurements of the noble gases in extraterrestrial materials (lunar samples and meteorites) to study the evolution of the solar system.

His research projects include using 40Ar-39Ar dating to determine the timing of impact events on the Moon and on asteroids, and studying Martian meteorites to understand the history of the Martian atmosphere and its interaction with surface materials. Past research projects have included using I-129, and its decay product Xe-129, to study the timing of the formation of the earliest solids in the solar nebula, and working on developing techniques to use instruments on spacecraft to measure ages of planetary surfaces in situ.

Director, Lunar and Planetary Laboratory
Department Head, Planetary Sciences
Professor, Lunar and Planetary Laboratory
Professor, Planetary Sciences
Professor, Geosciences

Dr. Swindle uses measurements of the noble gases in extraterrestrial materials (lunar samples and meteorites) to study the evolution of the solar system.

His research projects include using 40Ar-39Ar dating to determine the timing of impact events on the Moon and on asteroids, and studying Martian meteorites to understand the history of the Martian atmosphere and its interaction with surface materials. Past research projects have included using I-129, and its decay product Xe-129, to study the timing of the formation of the earliest solids in the solar nebula, and working on developing techniques to use instruments on spacecraft to measure ages of planetary surfaces in situ.

Associate Dean, Cooperative Extension / Economic Development
Director, Cooperative Extension- Services
Professor, Soil/Water and Environmental Science
Professor, Plant Science
Associate Director, Experiment Station
Professor, Arid Lands Resources Sciences - GIDP
Professor, Global Change - GIDP

Jeff's research program is directed towards the development of crop production management strategies (primarily irrigated cotton and cantaloupes) that optimize the soil-plant system agronomically and economically, with full consideration of the short- and long-term impact of inputs environmentally. A study of the soil-plant relationships regarding nurtrients essential to cotton and cantaloupes is an important part of the program. Salinity and sodicity management in agricultural soils is an important part of the program. The overall goal, by interacting with other programs, is to reduce the level of inputs such as pesticides, fertilizers, and irrigation water, and maintain profitability and sustainability in both the short- and long-term agricultural production systems in the desert Southwest.