NASA Astrobiology

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Emerging Trends in Comet Taxonomy. “Emerging trends and a comet taxonomy based on the volatile chemistry measured in thirty comets with high-resolution infrared spectroscopy between 1997 and 2013.” in Icarus

Cycles of Glaciation on Ancient Mars. “Climate Cycling on Early Mars Caused by the Carbonate-Silicate Cycle” in Earth and Planetary Astrophysics.

Methane Muted: How Did Early Earth Stay Warm?. “A proper accounting of biogeochemical cycles in the oceans reveals that methane has a much more powerful foe than oxygen.” in PNAS

Emerging Trends in Comet Taxonomy“Emerging trends and a comet taxonomy based on the volatile chemistry measured in thirty comets with high-resolution infrared spectroscopy between 1997 and 2013.” in Icarus01/03

Cycles of Glaciation on Ancient Mars“Climate Cycling on Early Mars Caused by the Carbonate-Silicate Cycle” in Earth and Planetary Astrophysics.02/03

Methane Muted: How Did Early Earth Stay Warm?“A proper accounting of biogeochemical cycles in the oceans reveals that methane has a much more powerful foe than oxygen.” in PNAS03/03

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November 2019Habitable Zone Boundaries for Circumbinary Planets

Cukier, W., Kopparapu, R. k., Kane, S. R., Welsh, W., Wolf, E., Kostov, V., & Haqq-Misra, J. (2019). Habitable Zone Boundaries for Circumbinary Planets. Publications of the Astronomical Society of the Pacific, 131(1006), 124402. doi:10.1088/1538-3873/ab50cb

Lower Triassic carbonate δ238U record demonstrates expanded ocean anoxia during Smithian Thermal Maximum and improved ventilation during Smithian-Spathian boundary cooling event

Zhao, H., Algeo, T. J., Liu, Y., Chen, Z-Q., Hu, Z., Zhang, L., & Li, Z. (2019). Lower Triassic carbonate δ238U record demonstrates expanded ocean anoxia during Smithian Thermal Maximum and improved ventilation during Smithian-Spathian boundary cooling event. Palaeogeography, Palaeoclimatology, Palaeoecology, None, 109393. doi:10.1016/j.palaeo.2019.109393

Minimal biomass deposition in banded iron formations inferred from organic matter and clay relationships

Dodd, M. S., Papineau, D., Pirajno, F., Wan, Y., & Karhu, J. A. (2019). Minimal biomass deposition in banded iron formations inferred from organic matter and clay relationships. Nature Communications, 10(1), None. doi:10.1038/s41467-019-12975-z

October 2019A Unified Model for Hydrogen in the Earth and Moon: No one expects the Theia Contribution

Desch, S. J., & Robinson, K. L. (2019). A Unified Model for Hydrogen in the Earth and Moon: No one expects the Theia Contribution. Geochemistry. doi:10.1016/j.chemer.2019.125546

Relative Humidity on Mars: New Results from the Phoenix TECP Sensor

Fischer, E., Martínez, G. M., Rennó, N. O., Tamppari, L. K., & Zent, A. P. (2019). Relative Humidity on Mars: New Results from the Phoenix TECP Sensor. Journal of Geophysical Research: Planets. doi:10.1029/2019je006080

Synthesis of 2-thioorotidine and comparison of its unusual instability with its canonical pyrimidine counterparts

Kumar, R., Springsteen, G., & Krishnamurthy, R. (2019). Synthesis of 2-thioorotidine and comparison of its unusual instability with its canonical pyrimidine counterparts. The Journal of Organic Chemistry. doi:10.1021/acs.joc.9b01546

ODEA: Orbital Dynamics in a complex Evolving Architecture - Application to the planetary system HD 106906

Rodet, L., Beust, H., Bonnefoy, M., De Rosa, R. J., Kalas, P., & Lagrange, A-M. (2019). ODEA: Orbital Dynamics in a complex Evolving Architecture - Application to the planetary system HD 106906. Astronomy & Astrophysics. doi:10.1051/0004-6361/201935728

Oxygen fugacities of extrasolar rocks: Evidence for an Earth-like geochemistry of exoplanets

Doyle, A. E., Young, E. D., Klein, B., Zuckerman, B., & Schlichting, H. E. (2019). Oxygen fugacities of extrasolar rocks: Evidence for an Earth-like geochemistry of exoplanets. Science, 366(6463), 356–359. doi:10.1126/science.aax3901

The Calculated Infrared Spectra of Functionalized Hexamethylenetetramine (HMT) Molecules

Bera, P. P., Sandford, S. A., Lee, T. J., & Nuevo, M. (2019). The Calculated Infrared Spectra of Functionalized Hexamethylenetetramine (HMT) Molecules. The Astrophysical Journal, 884(1), 64. doi:10.3847/1538-4357/ab3c4f

Simulations of Ice Chemistry in Cometary Nuclei

Garrod, R. T. (2019). Simulations of Ice Chemistry in Cometary Nuclei. The Astrophysical Journal, 884(1), 69. doi:10.3847/1538-4357/ab418e

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