Bolometric Hemispherical Albedo Map of Pluto from New Horizons Observations

The Planetary Science Journal American Astronomical Society 4:7 (2023) 132

Authors:

Jason D Hofgartner, Bonnie J Buratti, Ross A Beyer, Kimberly Ennico, Will M Grundy, Carly JA Howett, Perianne E Johnson, Tod R Lauer, Catherine B Olkin, John R Spencer, S Alan Stern, Harold A Weaver, Leslie A Young

Photochemical depletion of heavy CO isotopes in the Martian atmosphere

Nature Astronomy Springer Nature 7:7 (2023) 867-876

Authors:

Juan Alday, Alexander Trokhimovskiy, Manish R Patel, Anna A Fedorova, Franck Lefevre, Franck Montmessin, James A Holmes, Kylash Rajendran, Jon P Mason, Kevin S Olsen, Denis A Belyaev, Oleg Korablev, Lucio Baggio, Andrey Patrakeev, Alexey Shakun

Abstract:

The atmosphere of Mars is enriched in heavy isotopes with respect to Earth as a result of the escape of the atmosphere to space over billions of years. Estimating this enrichment requires a rigorous understanding of all atmospheric processes that contribute to the evolution of isotopic ratios between the lower and upper atmosphere, where escape processes take place. We combine measurements of CO vertical profiles obtained by the Atmospheric Chemistry Suite on board the ExoMars Trace Gas Orbiter with the predictions of a photochemical model and find evidence of a process of photochemistry-induced fractionation that depletes the heavy isotopes of C and O in CO (δ13C = −160 ± 90‰ and δ18O = −20 ± 110‰). In the upper atmosphere, accounting for this process reduces the escape fractionation factor by ~25%, suggesting that less C has escaped from the atmosphere of Mars than previously thought. In the lower atmosphere, incorporation of this 13C-depleted CO fractionation into the surface could support the abiotic origin of recently found Martian organics.

Effects of Albedo on the MIR Emissivity Spectra of Silicates for Lunar Comparison

Journal of Geophysical Research Planets American Geophysical Union (AGU) 128:4 (2023)

Authors:

KA Shirley, TD Glotch, O Donaldson, J Trelewicz, Y Yang, H Zhang

Short Period Seismometer for the Lunar Farside Seismic Suite Mission

Institute of Electrical and Electronics Engineers (IEEE) 00 (2023) 1-9

Authors:

Ian M Standley, William T Pike, Simon Calcutt, James P Hoffman

The Habitability of Venus

Space Science Reviews Springer Nature 219:2 (2023) 17

Authors:

F Westall, D Höning, G Avice, D Gentry, T Gerya, C Gillmann, N Izenberg, MJ Way, C Wilson