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Bonomo, A. S., Zeng, L., Damasso, M., & al. (2019). A giant impact as the likely origin of different twins in the Kepler-107 exoplanet system. Nature Astronomy, 3, 416-423. https://doi.org/10.1038/s41550-018-0684-9 (Original work published 2019)
Bonomo, A. S., Zeng, L., Damasso, M., & al. (2019). A giant impact as the likely origin of different twins in the Kepler-107 exoplanet system. Nature Astronomy, 3, 416-423. https://doi.org/10.1038/s41550-018-0684-9 (Original work published 2019)
Vanderspek, R., Huang, C. X., Vanderburg, A., Ricker, G. R., Latham, D. W., & al. (2019). TESS Discovery of an Ultra-short-period Planet around the Nearby M Dwarf LHS 3844. The Astrophysical Journal Letters, 871(2), L24. https://doi.org/10.3847/2041-8213/aafb7a (Original work published 2019)
Vanderspek, R., Huang, C. X., Vanderburg, A., Ricker, G. R., Latham, D. W., & al. (2019). TESS Discovery of an Ultra-short-period Planet around the Nearby M Dwarf LHS 3844. The Astrophysical Journal Letters, 871(2), L24. https://doi.org/10.3847/2041-8213/aafb7a (Original work published 2019)
Data from the newly commissioned Transiting Exoplanet Survey Satellite has revealed a "hot Earth" around LHS 3844, an M dwarf located 15 pc away. The planet has a radius of R ⊕ and orbits the star every 11 hr. Although the existence of an atmosphere...
Todd, Z. R., Szabla, R., Szostak, J. W., & Sasselov, D. D. (2019). UV photostability of three 2-aminoazoles with key roles in prebiotic chemistry on the early earth†. The Royal Society of Chemistry.
Todd, Z. R., Szabla, R., Szostak, J. W., & Sasselov, D. D. (2019). UV photostability of three 2-aminoazoles with key roles in prebiotic chemistry on the early earth†. The Royal Society of Chemistry.
Three related molecules in the 2-aminoazole family are potentially important for prebiotic chemistry: 2-aminooxazole, 2-aminoimidazole, and 2-aminothiazole, which can provide critical functions as an intermediate in nucleotide synthesis, a nucleotide...
Mortier, A., Bonomo, A., Rajpaul, V., & al. (2018). K2-263 b: a 50 d period sub-Neptune with a mass measurement using HARPS-N. Monthly Notices of the Royal Astronomical Society, 481(2), 1839-1847. https://doi.org/10.1093/mnras/sty2360 (Original work published 2018)
Mortier, A., Bonomo, A., Rajpaul, V., & al. (2018). K2-263 b: a 50 d period sub-Neptune with a mass measurement using HARPS-N. Monthly Notices of the Royal Astronomical Society, 481(2), 1839-1847. https://doi.org/10.1093/mnras/sty2360 (Original work published 2018)
This paper reports on the validation and mass measurement of K2-263 b, a sub-Neptune orbiting a quiet G9V star. Using K2 data from campaigns C5 and C16, we find this planet to have a period of 50.818947 ± 0.000094 d and a radius of 2.41 ± 0.12 R⊕. We...
Huang, C. X., Burt, J., Vanderburg, A., & al. (2018). TESS Discovery of a Transiting Super-Earth in the pi Mensae System. The Astrophysical Journal Letters, 868(2), L39. https://doi.org/10.3847/2041-8213/aaef91 (Original work published 2018)
Huang, C. X., Burt, J., Vanderburg, A., & al. (2018). TESS Discovery of a Transiting Super-Earth in the pi Mensae System. The Astrophysical Journal Letters, 868(2), L39. https://doi.org/10.3847/2041-8213/aaef91 (Original work published 2018)
We report the detection of a transiting planet around π Men (HD 39091), using data from the Transiting Exoplanet Survey Satellite (TESS). The solar-type host star is unusually bright (V = 5.7) and was already known to host a Jovian planet on a highly...
Ravi, A., Beck, M., Phillips, D. F., Bartels, A., Sasselov, D., Szentgyorgyi, A., & Walsworth, R. L. (2018). Visible-Spanning Flat Supercontinuum for Astronomical Applications. Journal of Lightwave Technology, 36(22), 5309-5315. https://doi.org/10.1109/JLT.2018.2872423 (Original work published 2018)
Ravi, A., Beck, M., Phillips, D. F., Bartels, A., Sasselov, D., Szentgyorgyi, A., & Walsworth, R. L. (2018). Visible-Spanning Flat Supercontinuum for Astronomical Applications. Journal of Lightwave Technology, 36(22), 5309-5315. https://doi.org/10.1109/JLT.2018.2872423 (Original work published 2018)
We demonstrate a broad, flat, visible supercontinuum spectrum that is generated by a dispersion-engineered tapered photonic crystal fiber pumped by a 1 GHz repetition rate turn-key Ti:sapphire laser outputting ~30 fs pulses at 800 nm. At a pulse energy...
Roberts, S. J., Szabla, R., Todd, Z. R., Stairs, S., Bucar, D.-K., Sponer, J., Sasselov, D. D., & Powner, M. W. (2018). Selective prebiotic conversion of pyrimidine and purine anhydronucleosides into Watson-Crick base-pairing arabino-furanosyl nucleosides in water. Nature Comm., 9, 4073-4083.
Roberts, S. J., Szabla, R., Todd, Z. R., Stairs, S., Bucar, D.-K., Sponer, J., Sasselov, D. D., & Powner, M. W. (2018). Selective prebiotic conversion of pyrimidine and purine anhydronucleosides into Watson-Crick base-pairing arabino-furanosyl nucleosides in water. Nature Comm., 9, 4073-4083.
Prebiotic nucleotide synthesis is crucial to understanding the origins of life on Earth. There are numerous candidates for life’s first nucleic acid, however, currently no prebiotic method to selectively and concurrently synthesise the canonical Watson...
Ranjan, S., Todd, Z. R., Sutherland, J. D., & Sasselov, D. D. (2018). Sulfidic Anion Concentrations on Early Earth for Surgical Origins-of-Life Chemistry. Astrobiology, 18(8), 1023-1040.
Ranjan, S., Todd, Z. R., Sutherland, J. D., & Sasselov, D. D. (2018). Sulfidic Anion Concentrations on Early Earth for Surgical Origins-of-Life Chemistry. Astrobiology, 18(8), 1023-1040.
A key challenge in origin-of-life studies is understanding the environmental conditions on early Earth under which abiogenesis occurred. While some constraints do exist (e.g., zircon evidence for surface liquid water), relatively few constraints exist on...
Xu, J., Ritson, D. J., Ranjan, S., Todd, Z. R., Sasselov, D. D., & Sutherland, J. D. (2018). Photochemical reductive homologation of hydrogen cyanide using sulfite and ferrocyanide. Chem. Commun., 54, 5566-5569.
Xu, J., Ritson, D. J., Ranjan, S., Todd, Z. R., Sasselov, D. D., & Sutherland, J. D. (2018). Photochemical reductive homologation of hydrogen cyanide using sulfite and ferrocyanide. Chem. Commun., 54, 5566-5569.
Photoredox cycling during UV irradiation of ferrocyanide in the presence of stoichiometric sulfite is shown to be an extremely effective way to drive the reductive homologation of hydrogen cyanide (HCN) to simple sugars and precursors of hydroxy acids and...
Todd, Z. R., Fahenbach, A. C., Magnani, C. J., Ranjan, S., Bjorkbom, A., Szostak, J. W., & Sasselov, D. D. (2018). Solvated-electron production by cyanocuprates is compatible with the UV-environment on the Haden-Archaean Earth. Chem. Commun., 54, 1121-1124.
Todd, Z. R., Fahenbach, A. C., Magnani, C. J., Ranjan, S., Bjorkbom, A., Szostak, J. W., & Sasselov, D. D. (2018). Solvated-electron production by cyanocuprates is compatible with the UV-environment on the Haden-Archaean Earth. Chem. Commun., 54, 1121-1124.
UV-driven photoredox processing of cyanocuprates can generate simple sugars necessary for prebiotic synthesis. We investigate the wavelength dependence of this process from 215 to 295 nm and generally observe faster rates at shorter wavelengths. The most...
Levi, A., & Sasselov, D. (2018). A New Desalination Pump Help Define the pH of Ocean Worlds . The Astrophysical Journal, 857(1).
Levi, A., & Sasselov, D. (2018). A New Desalination Pump Help Define the pH of Ocean Worlds . The Astrophysical Journal, 857(1).
We study ocean exoplanets, for which the global surface ocean is separated from the rocky interior by a high-pressure ice mantle. We describe a mechanism that can pump salts out of the ocean, resulting in oceans of very low salinity. Here we focus on the...