Results 21 to 30 of about 108,558 (304)

Fundamental data on the desorption of pure interstellar ices [PDF]

, 2007
The desorption of molecular ices from grain surfaces is important in a number of astrophysical environments including dense molecular clouds, cometary nuclei and the surfaces and atmospheres of some planets.
A. S. Bolina, Bolina, Jenniskens, W. A. Brown   +3 more
core   +1 more source

Intrinsic reconstruction of ice-I surfaces [PDF]

Science Advances, 2020
Atomic force microscopy showed that the reconstruction of ice-I surfaces occurs with a short-range (2 × 2) H-atom order.
N. Kawakami, K. Iwata, A. Shiotari, Y. Sugimoto   +3 more
openaire   +2 more sources

Direct measurement of the size of 2003 UB313 from the Hubble Space Telescope [PDF]

, 2006
We have used the Hubble Space Telescope to directly measure the angular size of the large Kuiper belt object 2003 UB313. By carefully calibrating the point spread function of a nearby field star, we measure the size of 2003 UB313 to be 34.3$\pm$1.4 ...
Barkume K. M., C. A. Trujillo, D. L. Rabinowitz, E. L. Schaller, H. G. Roe, M. E. Brown   +5 more
core   +3 more sources

Contribution of exogenous genetic elements to the group A Streptococcus metagenome. [PDF]

PLoS ONE, 2007
Variation in gene content among strains of a bacterial species contributes to biomedically relevant differences in phenotypes such as virulence and antimicrobial resistance.
Stephen B Beres, James M Musser
doaj   +1 more source

The Spatial Distribution of the Unidentified 2.07 μm Absorption Feature on Europa and Implications for its Origin

The Planetary Science Journal, 2023
A weak absorption feature at 2.07 μ m on Europa’s trailing hemisphere has been suggested to arise from radiolytic processing of an endogenic salt, possibly sourced from the interior ocean.
M. Ryleigh Davis, Michael E. Brown, Samantha K. Trumbo   +2 more
doaj   +1 more source

Quantification of segregation dynamics in ice mixtures

, 2009
(Abridged) The observed presence of pure CO2 ice in protostellar envelopes is attributed to thermally induced ice segregation, but a lack of quantitative experimental data has prevented its use as a temperature probe. Quantitative segregation studies are
Bergin, Bergin, Bernstein, Bouwman, Chiar, Collings, Collings, Cuppen, Dartois, E. C. Fayolle, E. F. van Dishoeck, Ehrenfreund, Ehrenfreund, Fuchs, Garrod, Gerakines, Gerakines, Gerakines, H. Linnartz, H. M. Cuppen, Hodyss, Ioppolo, Jenniskens, K. I. Öberg, Knez, Loeffler, Los, Los, Merrill, Nummelin, Palumbo, Pontoppidan, Pontoppidan, Sandford, Sonnentrucker, Teolis, Tielens, van Broekhuizen, Visser, Watanabe, Watanabe, Zasowski, Öberg, Öberg   +43 more
core   +1 more source

A Peculiar Family of Jupiter Trojans: the Eurybates [PDF]

, 2010
The Eurybates family is a compact core inside the Menelaus clan, located in the L4 swarm of Jupiter Trojans. Fornasier et al. (2007) found that this family exhibits a peculiar abundance of spectrally flat objects, similar to Chiron-like Centaurs and C ...
Beaugé, Brunetto, Brunetto, D. Perna, Dell’Oro, Doressoundiram, Dotto, Dotto, E. Dotto, Emery, Emery, F. De Luise, F. Marzari, Fernández, Florczak, Fornasier, Fornasier, Hudson, Khare, Khare, Khare, Lazzarin, M.A. Barucci, Marzari, Marzari, Marzari, Marzari, Marzari, McDonald, McDonald, Melita, Milani, Milani, Moore, Morbidelli, Moroz, Moroz, N. Pinilla-Alonso, Rickman, Roig, S. Fornasier, Strazzulla, Tancredi, Thompson, Vilas, Vilas, Yang, Zubko   +47 more
core   +5 more sources

Vacuum ultraviolet photoabsorption spectra of nitrile ices for their identification on Pluto [PDF]

, 2016
Icy bodies, such as Pluto, are known to harbor simple and complex molecules. The recent New Horizons flyby of Pluto has revealed a complex surface composed of bright and dark ice surfaces, indicating a rich chemistry based on nitrogen (N2), methane (CH4),
B. N. Raja Sekhar, B. Sivaraman, B.-M. Cheng, Christopher K. M., H. Hill, Hsiao-Chi L., J.-I. Lo, Kelsi N. S., Kim Y. S., Marla H. M., Michael E. B., N. J. Mason, Olkin C. B., S. Pavithraa, Yu-Jong W.   +14 more
core   +2 more sources

Modeling the processing of interstellar ices by energetic particles [PDF]

, 2013
Context. Interstellar ice is the main form of metal species in dark molecular clouds. Experiments and observations have shown that the ice is significantly processed after the freeze-out of molecules onto grains.
Kalvāns, Juris, Shmeld, Ivar
core   +1 more source

Chemical Kinetics Simulations of Ice Chemistry on Porous Versus Non-Porous Dust Grains

Frontiers in Astronomy and Space Sciences, 2021
The degree of porosity in interstellar dust-grain material is poorly defined, although recent work has suggested that the grains could be highly porous.
Drew A. Christianson, Robin T. Garrod, Robin T. Garrod   +2 more
doaj   +1 more source