scholarly journals Rotationally shearing interferometer for extra-solar planet detection: preliminary results with a solar system simulator

2020 ◽  
Vol 28 (20) ◽  
pp. 29553
Author(s):  
M. Strojnik ◽  
B. Bravo-Medina
Keyword(s):  
Solar System ◽  
Planet Detection ◽  
Preliminary Results

scholarly journals Comets

1998 ◽  
Vol 11 (2) ◽  
pp. 1155-1156
Author(s):  
H.U. Keller
Keyword(s):  
Solar System ◽  
Physical Properties ◽  
Data Reduction ◽  
Kuiper Belt ◽  
Preliminary Results ◽  
Open Time ◽  
Transneptunian Objects ◽  
Selection For

Comets, the most pristine members of our solar system, are faint at large heliocentric distances (rh > 3 au) and therefore difficult to observe. Data reduction of these faint objects (periodic comets) is time consuming and hence most often just preliminary results can be discussed. Only the orbits of short periodic comets can be predicted and most of those that have been accessible for ISO have been covered within the guaranteed time programme. About 10 proposals were accepted by the selection for open time proposals. A target of opportunity team was formed. The outstanding comet Hale-Bopp (C/1995 01), one of the brightest and therefore most active comets of this century, was suggested and accepted as TOO. The important results from the ISO cometary programme are derived from its observations. In addition to the observations of "classic" comets the newly detected (Jewitt and Luu, 1993) transneptunian objects, probably objects from the Kuiper belt, are observed in an attempt to determine their physical properties.

scholarly journals PRELIMINARY RESULTS FROM NEOWISE: AN ENHANCEMENT TO THEWIDE-FIELD INFRARED SURVEY EXPLORERFOR SOLAR SYSTEM SCIENCE

2011 ◽  
Vol 731 (1) ◽  
pp. 53 ◽  
Author(s):  
A. Mainzer ◽  
J. Bauer ◽  
T. Grav ◽  
J. Masiero ◽  
R. M. Cutri ◽  
...  
Keyword(s):  
Solar System ◽  
System Science ◽  
Preliminary Results ◽  
Infrared Survey

scholarly journals Scattering Properties of Dust Particles in Weightlessness

1996 ◽  
Vol 150 ◽  
pp. 415-418 ◽  
Author(s):  
J. C. Worms ◽  
A.C. Levasseur-Regourd ◽  
E. Hadamcik ◽  
D. Bourras
Keyword(s):  
Solar System ◽  
Physical Properties ◽  
Dust Particles ◽  
Preliminary Results ◽  
Maximum Polarization ◽  
Microgravity Conditions

AbstractPolarimetric measurements of the light scattered by irregular dust particles are essential to interpret observations of solar system dust in terms of its physical properties. We developed a iight scattering unit to retrieve polarimetric phase curves of dust samples in microgravity conditions. Preliminary results suggest that the values for the maximum polarization are higher under 1 “ g ” than under 0 “ g ” This can be compared to ground-based measurements which exhibit higher values for packed dust than for sifted dust. The unit is operational and is used to help design a related orbital experiment.

Structural and Thermal Icy Satellite Models: Preliminary Results

1984 ◽  
Vol 5 (4) ◽  
pp. 487-489
Author(s):  
P. J. Thomas
Keyword(s):  
Melting Point ◽  
Solar System ◽  
Methane Hydrates ◽  
Outer Solar System ◽  
Water Ice ◽  
Preliminary Results

The satellites of the outer solar system appear to be composed principally of water ice and silicates, with the presence of ammonia and methane hydrates (Lewis 1971). Although these bodies are small (with radii typically < 1000 km) they can exhibit very active evolutionary histories, due to the low melting point of water ice.

scholarly journals Jets of Fragments from Catastrophic Break-up and their Astrophysical Implications

1991 ◽  
Vol 126 ◽  
pp. 383-386
Author(s):  
G. Martelli ◽  
P. Rothwell ◽  
P.N. Smith ◽  
I. Giblin ◽  
J. Martinsson ◽  
...  
Keyword(s):  
Solar System ◽  
Large Scale ◽  
Hypervelocity Impact ◽  
Preliminary Results ◽  
Artificial Rock ◽  
Solar System Bodies ◽  
Break Up ◽  
First Time

AbstractWe present some preliminary results of a series of catastrophic break-up experiments carried out in the open, against targets of natural and artificial rock, with and without a harder core. These experiments were aimed at investigating the outcomes of hypervelocity impact disruption phenomena, designed to understand the influence of large-scale collisions on the evolution of asteroids and other small solar system bodies. For the first time in this kind of experiments, evidence was found of collimated jets, i.e. the ejection of a statistically significant number of fragments all closely aligned about some preferential planes. Moreover, the presence of some groups of fragments lying close to each other on the ground was also detected.

scholarly journals The Formation of Disks by Inelastic Collisions of Gravitating Particles. Applications to the Formation of Galaxies

1974 ◽  
Vol 58 ◽  
pp. 173-179
Author(s):  
André Brahic
Keyword(s):  
Solar System ◽  
Equilibrium State ◽  
Numerical Study ◽  
Inelastic Collisions ◽  
Preliminary Results ◽  
Final Equilibrium State ◽  
Potential Applications ◽  
Saturn’S Rings ◽  
Saturn's Rings ◽  
Collision Mechanism

The numerical study of a gravitating system of colliding particles has many potential applications, for instance the formation of flat galaxies, the formation of the solar system and the evolution of Saturn's rings. Preliminary results are presented for the galactic case. The system tends towards a final equilibrium state and it seems that such a collision mechanism can flatten a protogalaxy.

scholarly journals The Present Status of the Munich Dust Counter Experiment on Board of the Hiten Spacecraft

1991 ◽  
Vol 126 ◽  
pp. 15-20 ◽  
Author(s):  
E. Igenbergs ◽  
A. Hüdepohl ◽  
K. Uesugi ◽  
T. Hayashi ◽  
H. Svedhem ◽  
...  
Keyword(s):  
Solar System ◽  
Present Status ◽  
Cosmic Dust ◽  
Dust Particles ◽  
Preliminary Results ◽  
Scientific Experiment ◽  
Directional Distributions

AbstractThe Munich Dust Counter (MDC) is a scientific experiment on board the MUSES-A mission of Japan measuring cosmic dust. The satellite HITEN of this mission has been launched on January 24th, 1990 from Kagoshima Space Center. Here the present status of the MDC experiment is summarized. The number of dust particles measured so far is presented together with first and preliminary results of flux calculations and spatial as well as directional distributions of cosmic dust particles measured until July 25, 1990. A clear evidence of particles coming from the inner solar system (beta-meteoroids) already has been found. These are compared to particles coming from the apex direction.

scholarly journals Astrometric data for NEAs extracted from the infrared DENIS survey

2007 ◽  
Vol 3 (S248) ◽  
pp. 544-547
Author(s):  
W. Thuillot ◽  
J. Berthier ◽  
J. Iglésias ◽  
G. Simon ◽  
V. Lainey
Keyword(s):  
Solar System ◽  
Virtual Observatory ◽  
Preliminary Results ◽  
Spectral Bands ◽  
Solar System Objects ◽  
Many Sources ◽  
Near Earth Asteroids ◽  
Astrometric Data

AbstractWhen astrometric data can be extracted from archives, this generally allows us to get very strong constraints for the orbital modeling of Solar System objects. This is particularly important for Near-Earth Asteroids. We have developed tools in the Virtual Observatory framework in order to carry out such a task. We have applied them to the DENIS survey. This survey has been performed from 1995 to 2001 in the I, J, K' spectral bands with a 1m telescope at ESO La Silla. Many sources associated to Solar System Objects have been identified and we present our preliminary results.

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