Radiolysis of N2-rich astrophysical ice by swift oxygen ions: implication for space weathering of outer solar system bodies

2017 ◽  
Vol 19 (35) ◽  
pp. 24154-24165 ◽  
Author(s):  
F. A. Vasconcelos ◽  
S. Pilling ◽  
W. R. M. Rocha ◽  
H. Rothard ◽  
P. Boduch
Keyword(s):  
Solar System ◽  
Ion Irradiation ◽  
Space Weathering ◽  
Outer Solar System ◽  
Oxygen Ions ◽  
Solar System Bodies

We reported results for ion irradiation of N2-rich ices with implications for space weathering of outer solar bodies.

Solar system astrometry, Gaia, and the large surveys – a huge step ahead to stellar occultations by distant small solar system bodies

2017 ◽  
Vol 12 (S330) ◽  
pp. 397-398
Author(s):  
J. I. B. Camargo ◽  
M. V. Banda-Huarca ◽  
R. L. Ogando ◽  
J. Desmars ◽  
F. Braga-Ribas ◽  
...  
Keyword(s):  
Solar System ◽  
Outer Solar System ◽  
Stellar Occultation ◽  
Stellar Occultations ◽  
Solar System Bodies

AbstractThe stellar occultation technique is a powerful tool to study distant small solar system bodies. Currently, around 2 500 trans-neptunian objects (TNOs) and Centaurs are known. With the astrometry from Gaia and large surveys like the Large Synoptic Survey Telescope (LSST), accurate predictions of occultation events will be available to tens of thousands of TNOs and Centaurs and boost the knowledge of the outer solar system.

Construction of a photometer to detect stellar occultations by outer solar system bodies for the Whipple mission concept

2014 ◽  
Author(s):  
Ralph P. Kraft ◽  
Almus T. Kenter ◽  
Charles Alcock ◽  
Stephen S. Murray ◽  
Markus Loose ◽  
...  
Keyword(s):  
Solar System ◽  
Outer Solar System ◽  
Stellar Occultations ◽  
Solar System Bodies

scholarly journals Production of Oxidants by Ion Bombardment of Icy Moons in the Outer Solar System

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Philippe Boduch ◽  
Enio Frota da Silveira ◽  
Alicja Domaracka ◽  
Oscar Gomis ◽  
Xue Yang Lv ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Peroxide ◽  
Solar System ◽  
Ion Irradiation ◽  
Pure Water ◽  
Outer Solar System ◽  
Water Ice ◽  
Icy Moons ◽  
Different Temperatures ◽  
Frozen Gases

Our groups in Brazil, France and Italy have been active, among others in the world, in performing experiments on physical-chemical effects induced by fast ions colliding with solids (frozen gases, carbonaceous and organic materials, silicates, etc.) of astrophysical interest. The used ions span a very large range of energies, from a few keV to hundreds MeV. Here we present a summary of the results obtained so far on the formation of oxidants (hydrogen peroxide and ozone) after ion irradiation of frozen water, carbon dioxide and their mixtures. Irradiation of pure water ice produces hydrogen peroxide whatever is the used ion and at different temperatures. Irradiation of carbon dioxide and water frozen mixtures result in the production of molecules among which hydrogen peroxide and ozone. The experimental results are discussed in the light of the relevance they have to support the presence of an energy source for biosphere on Europa and other icy moons in the outer Solar System.

scholarly journals A Digital Video System for Observing and Recording Occultations

2015 ◽  
Vol 32 ◽  
Author(s):  
M. A. (Tony) Barry ◽  
Dave Gault ◽  
Hristo Pavlov ◽  
William Hanna ◽  
Alistair McEwan ◽  
...  
Keyword(s):  
Solar System ◽  
Dead Time ◽  
Low Cost ◽  
Low Noise ◽  
Recording System ◽  
Outer Solar System ◽  
Main Belt ◽  
Recording Equipment ◽  
The Past ◽  
Solar System Bodies

AbstractStellar occultations by asteroids and outer solar system bodies can offer ground based observers with modest telescopes and camera equipment the opportunity to probe the shape, size, atmosphere, and attendant moons or rings of these distant objects. The essential requirements of the camera and recording equipment are: good quantum efficiency and low noise; minimal dead time between images; good horological faithfulness of the image timestamps; robustness of the recording to unexpected failure; and low cost. We describe an occultation observing and recording system which attempts to fulfil these requirements and compare the system with other reported camera and recorder systems. Five systems have been built, deployed, and tested over the past three years, and we report on three representative occultation observations: one being a 9 ± 1.5 s occultation of the trans-Neptunian object 28978 Ixion (mv =15.2) at 3 seconds per frame; one being a 1.51 ± 0.017 s occultation of Deimos, the 12 km diameter satellite of Mars, at 30 frames per second; and one being a 11.04 ± 0.4 s occultation, recorded at 7.5 frames per second, of the main belt asteroid 361 Havnia, representing a low magnitude drop (Δmv = ~0.4) occultation.

scholarly journals Tholins as coloring agents on outer Solar System bodies

2005 ◽  
Vol 36 (2) ◽  
pp. 178-183 ◽  
Author(s):  
Dale P. Cruikshank ◽  
Hiroshi Imanaka ◽  
Cristina M. Dalle Ore
Keyword(s):  
Solar System ◽  
Outer Solar System ◽  
Solar System Bodies ◽  
Coloring Agents
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