Results 11 to 20 of about 108,558 (304)

Are NH3 and CO2 Ice Present on Miranda?

The Planetary Science Journal, 2023
Published near-IR spectra of the four largest classical Uranian satellites display the presence of discrete deposits of CO _2 ice, along with subtle absorption features around 2.2 μ m.
Riley A. DeColibus, Nancy J. Chanover, Richard J. Cartwright   +2 more
doaj   +1 more source

A CO2 Cycle on Ariel? Radiolytic Production and Migration to Low-latitude Cold Traps

The Planetary Science Journal, 2022
CO _2 ice is present on the trailing hemisphere of Ariel but is mostly absent from its leading hemisphere. The leading/trailing hemispherical asymmetry in the distribution of CO _2 ice is consistent with radiolytic production of CO _2 , formed by charged
Richard J. Cartwright, Tom A. Nordheim, Riley A. DeColibus, William M. Grundy, Bryan J. Holler, Chloe B. Beddingfield, Michael M. Sori, Michael P. Lucas, Catherine M. Elder, Leonardo H. Regoli, Dale P. Cruikshank, Joshua P. Emery, Erin J. Leonard, Corey J. Cochrane   +13 more
doaj   +1 more source

GEOLOGICAL MAPPING OF PLUTO AND CHARON USING NEW HORIZONS DATA [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Pluto and Charon exhibit strikingly different surface appearances, despite their similar densities and presumed bulk compositions. Systematic mapping has revealed that much of Pluto’s surface can be attributed to surface-atmosphere interactions and the ...
J. M. Moore, J. R. Spencer, W. B. McKinnon, A. D. Howard, O. M. White, O. M. Umurhan, P. M. Schenk, R. A. Beyer, K. Singer, S. A. Stern, H. A. Weaver, L. A. Young, K. Ennico Smith, C. Olkin, New Horizons Geology and Geophysics Imaging Team   +14 more
doaj   +1 more source

Indirect ultraviolet photodesorption from CO:N2 binary ices - an efficient grain-gas process [PDF]

, 2013
UV ice photodesorption is an important non-thermal desorption pathway in many interstellar environments that has been invoked to explain observations of cold molecules in disks, clouds and cloud cores. Systematic laboratory studies of the photodesorption
Bertin, Mathieu, Fayolle, Edith C., Fillion, Jean-Hugues, Jeseck, Pascal, Linnartz, Harold, Michaut, Xavier, Philippe, Laurent, Poderoso, Hugo A. M., Romanzin, Claire, Öberg, Karin I.   +9 more
core   +5 more sources

Ice Nucleation on a Corrugated Surface [PDF]

Journal of the American Chemical Society, 2018
Heterogeneous ice nucleation is a key process in many environmental and technical fields and is of particular importance in modeling atmospheric behavior and the Earth's climate. Despite an improved understanding of how water binds at solid surfaces, no clear picture has emerged to describe how 3D ice grows from the first water layer, nor what makes a ...
Chenfang Lin, Gefen Corem, Oded Godsi, Gil Alexandrowicz, George R. Darling, Andrew Hodgson   +5 more
openaire   +4 more sources

Molecules, ices and astronomy [PDF]

, 2007
Molecules in interstellar gas and in interstellar ices play a fundamental role in astronomy. However, the formation of the simplest molecule, molecular hydrogen, is still not fully understood.
Brown, W A, Price, S D, Rawlings, J M C, Viti, S, Williams, D A   +4 more
core   +1 more source

Crystallization Kinetics of Vitreous Magnesium Sulfate Hydrate and Implications for Europa’s Surface

The Planetary Science Journal, 2023
Brines consistent with that expected for Europa’s global subsurface ocean have been shown to form vitreous salt hydrates when frozen. We report experiments examining the crystallization kinetics of vitreous MgSO _4 hydrate in order to better understand ...
Paul V. Johnson, Tuan H. Vu, Robert Hodyss   +2 more
doaj   +1 more source

The effects of methanol on the trapping of volatile ice components [PDF]

, 2015
The evaporation of icy mantles, which have been formed on the surface of dust grains, is acknowledged to give rise to the rich chemistry that has been observed in the vicinity of hot cores and corinos.
Adriaens, Ayotte, Backus, Bar-Nun, Blake, Bockelee-Morvan, Bolina, Bolina, Boogert, Brown, Burke, Burke, Codella, Collings, Cruikshank, Daren J. Burke, Dartois, De Jong, DelloRusso, Edridge, Ehrenfreund, Ehrenfreund, Fraser, Garozzo, Gibb, Goumans, Grim, Hagen, Herbst, Ioppolo, Jewitt, Klinger, Lellouch, Martín-Doménech, Merlin, Merlin, Mills, Notesco, Palumbo, Palumbo, Pontoppidan, Smith, Smith, Souda, Souda, Souda, Viti, Wendy A. Brown, Whittet, Wolff, Yung   +50 more
core   +1 more source

Cosmic-ray-mediated Formation of Benzene on the Surface of Saturn's Moon Titan [PDF]

, 2010
The aromatic benzene molecule (C_6H_6)—a central building block of polycyclic aromatic hydrocarbon molecules—is of crucial importance for the understanding of the organic chemistry of Saturn's largest moon, Titan. Here, we show via laboratory experiments
Kaiser, Ralf I., Landera, Alexander, Liang, Mao-Chang, Mebel, Alexander M., Yung, Yuk L., Zheng, Weijun, Zhou, Li   +6 more
core   +1 more source

Water formation on bare grains: When the chemistry on dust impacts interstellar gas [PDF]

, 2010
Context. Water together with O2 are important gas phase ingredients to cool dense gas in order to form stars. On dust grains, H2 O is an important constituent of the icy mantle in which a complex chemistry is taking place, as revealed by hot core ...
Akai, Andersson, Andersson, Bachellerie, Bergeron, Bergin, Bolina, Brown, Caselli, Cazaux, Cazaux, Cazaux, Chang, Cuppen, Cuppen, D’Hendecourt, Fromherz, Garrod, Ghio, Gibb, Goldsmith, González, Hasegawa, Heine, Hollenbach, Hollenbach, Ioppolo, Jelea, Jeloaica, Jones, Jones, Katz, Lee, Lee, Lin, M. Marseille, M. Spaans, Meijerink, Miyauchi, Mokrane, Neufeld, Oberg, P. Caselli, Papoular, Pirronello, Rougeau, S. Cazaux, Sha, Snow, Tielens, V. Cobut, Walch, Whittet, Williams   +53 more
core   +4 more sources