Joshua P. Emery
Department of Earth and Planetary Sciences
1412 Circle Drive
Knoxville, TN 37996-1410
The overarching theme that motivates my research in planetary science is discovering how our Solar System formed and evolved to its present state. My particular niche in this broad theme is determining surface compositions of planetary bodies and interpreting them in terms of surface alteration mechanisms and, ultimately, formation conditions. Of particular interest is investigating the distribution of organic material in the Solar System. As an observational planetary astronomer, the main techniques that I apply are reflection and emission spectroscopy and spectrophotometry using ground-based telescopes, space-based telescopes, and interplanetary spacecraft. Targets of my research have spanned the Solar System, from the innermost terrestrial planet (Mercury) to the farthest reaches of the Kuiper Belt (Sedna).
Current projects include:
- Jupiter Trojan asteroids – These have been a strong focus of my research because they are a key group for distinguishing several models of Solar System evolution and for understanding the distribution of organic material (UT undergraduate student Richie Ness).
- OSIRIS-REx – This is a NASA mission to return samples from a primitive near-Earth asteroid (1999 RQ36). Exploration is what drew me to planetary science, and I am absolutely thrilled to be a co-investigator on this robotic spacecraft mission. (Dr. Ben Rozitis is working with me on this project.)
- Near-infrared spectroscopy of outer Main Belt asteroids.
- Reflectance spectrophotometry of Kuiper Belt objects (Dr. Noemi Pinilla-Alonso and UT undergraduate Chad Melton).
- Thermal and mineralogical characterization of V-type asteroids, M-type asteroids, extinct comets, and primitive asteroids (Dr. Ben Rozitis and UT PhD student Eric MacLennan).
- Thermal and near-infrared observations of near-Earth asteroids (UT MS student Nate Wigton).
- Analysis of the composition, structure, and surface temperatures of the three icy Galilean moons of Jupiter from New Horizons spacecraft data. (Dr. Noemi Pinilla-Alonso)
- Mineralogical characterization of evolved asteroids and their analogs (UT PhD student Mike Lucas).
- Reflectance spectroscopy of satellites of Uranus (UT PhD student Richard Cartwright)
- Takir, D. and J.P. Emery 2012. Outer Main Belt asteroids: Identification and distribution of four 3-μm spectral groups. Icarus 219, 641-654.
- Emery, J.P., D.M. Burr, D.P. Cruikshank 2011. Near-Infrared spectroscopy of Trojan asteroids: Evidence for two compositional groups. Astron J 141, article id 25.
- Lim, L.F., J.P. Emery, N.A. Moskovitz 2011. Spitzer IRS (5-30 micron) Spectra of Basaltic Asteroid 956 Elisa: Mineralogy and Thermal Properties. Icarus 213, 510-523.
- Lellouch, E., J. Stansberry, J. Emery, W. Grundy, D.P. Cruikshank 2011. Thermal properties of Pluto's and Charon's surfaces from Spitzer observations. Icarus 214, 701-716.
- Rivkin, A.S. and J.P. Emery 2010. Detection of ice and organics on an asteroidal surface. Nature 464, 1322-1323.
- Trilling and 15 co-authors (including J.P. Emery) 2010. ExploreNEOs I. Description and first results from the Warm Spitzer Near-Earth Object survey. Astron. J. 140, 770-784.
- Cruikshank, D.P., J.P. Emery, K.A. Kornei, G. Bellucci, E. d'Aversa 2010. Eclipse reappearance of Io: Time-resolved spectroscopy (1.9 – 4.2 μm). Icarus 205, 516-525.
- Mueller, M., F. Marchis, J.P. Emery, A.W. Harris, S. Mottola, D. Hestroffer, J. Berthier, M. di Martino 2010. Eclipsing binary Trojan asteroid Patroclus: Thermal inertia from Spitzer observations. Icarus 205, 505-515.
- Reddy, V., J.P. Emery, M.J. Gaffey, W.F. Bottke, A. Cramer, M.S. Kelley 2009. Composition of 298 Baptistina: Implications for the K/T impactor link. Meteor. & Planet. Sci. 44, 1917-1927.
- Dalle Ore, C.M., M.A. Barucci, J.P. Emery, D.P. Cruikshank, et al. 2009. Composition of KBO (50000) Quaoar. Astron. Astrophys. 501, 349-357.
- Barucci, M.A., M.E. Brown, J.P. Emery, F. Merlin 2008. Composition and surface properties of transneptunian objects and Centaurs. In The Solar System Beyond Neptune (ed. M.A. Barucci, H. Boehnhardt, D.P. Cruikshank, A. Morbidelli), Univ. Ariz. Press, Tucson, 143-160.
- Emery, J.P. C. Dalle Ore, D.P. Cruikshank, Y.R. Fernandez, D.E. Trilling, J.A. Stansberry 2007. Ices on (90377) Sedna: Confirmation and compositional constraints. A&A 466, 395-398.
- Grundy, W.M., B.J. Buratti, A.F. Cheng, J.P. Emery, et al. 2007. New Horizons mapping of Europa and Ganymede. Science 318, 234-237.
- Emery, J.P., D.P. Cruikshank, J. Van Cleve 2006. Thermal emission spectroscopy (5.2 – 38 μm) of three Trojan asteroids with the Spitzer Space Telescope: Detection of fine-grained silicates. Icarus 182, 496-512.
- Burr, D.M., J.P.Emery, R.D. Lorenz, G.C. Collins, P.A. Carling 2006. Sediment transport by liquid surficial flow: Application to Titan. Icarus, 181, 235-242.
- Warell, J., A.L. Sprague, J.P. Emery, R.W.H. Kozlowski, A. Long 2006. The 0.7 – 5.3 μm IR spectra of Mercury and the Moon: Evidence for high-Ca clinopyroxene on Mercury. Icarus 180, 281-291.