Results 11 to 20 of about 282,415 (218)

Dust colors, dust release rates, and dust-to-gas ratios in the comae of six comets [PDF]

Astronomy and Astrophysics Supplement Series, 1996
In an attempt to find correlations between properties of comets, we determine the dust colors, dust release rates, and dust-to-gas mass ratios in the comae of Comets Bowell (1980 b = 1982 I), Bradfield (1979 l = 1979 X), Brorsen-Metcalf (1989 o = 1989 X), Giacobini-Zinner (1984 e = 1985 XIII), Levy (1990 c = 1990 XX), and Stephan-Oterma (1980 g = 1980 ...
G. C. Sanzovo, P. D. Singh, W. F. Huebner   +2 more
openaire   +1 more source

Dust in cometary comae: Present understanding of the structure and composition of dust particles [PDF]

Planetary and Space Science, 2008
In situ probing of a very few cometary comae has shown that dust particles present a low albedo and a low density, and that they consist of both rocky material and refractory organics. Remote observations of solar light scattered by cometary dust provide information on the properties of dust particles in the coma of a larger set of comets.
Levasseur-Regourd, Anny Chantal, Zolensky, M., Lasue, Jérémie   +2 more
openaire   +3 more sources

On positively charged dust in the coma of comet 67P

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT Moment analysis of ion spectrograms measured by the Ion Composition Analyser (ICA) in the coma of comet 67P typically produces an ion number density estimate markedly lower than the number density of free electrons as measured by the Mutual Impedance Probe and the dual Langmuir Probe. While there are good reasons to distrust the
E Vigren, A I Eriksson, S Bergman
openaire   +1 more source

Numerical Simulation of Dust in a Cometary Coma: Application to Comet 67P/Churyumov-Gerasimenko [PDF]

, 2011
The Rosetta spacecraft is en route to comet 67P/Churyumov-Gerasimenko for a rendezvous, landing, and extensive orbital phase beginning in 2014. With a limited amount of available observational data, planning of the mission as well as the interpretation ...
Combi, Michael R., Tenishev, Valeriy, Martin Rubin, Valeriy Tenishev, Tenishev, Valeriy M., Rubin, Martin, Michael R. Combi   +6 more
core   +2 more sources

A composite phase function for cometary dust comae [PDF]

Planetary and Space Science
Comets are primitive planetesimals we can study to infer knowledge about the initial stages of formation of our Solar System. Dust is the largest mass component among cometary materials. Emitted dust particles are anysotropic scatterers of the incident solar light and their nature can be investigated with remote sensing studies. Among such studies, the
Ivano Bertini, Jean–Baptiste Vincent, Raphael Marschall, Fiorangela La Forgia, Alessandra Mura, Laura Inno, Stavro Ivanovski, Michael Küppers, Cecilia Tubiana, Vladimir Zakharov   +9 more
openaire   +2 more sources

Kinetic simulation of neutral∕ionized gas and electrically charged dust in the coma of comet 67P∕Churyumov-Gerasimenko [PDF]

, 2011
The cometary coma is a unique phenomenon in the solar system being a planetary atmosphere influenced by little or no gravity. As a comet approaches the sun, the water vapor with some fraction of other gases sublimate, generating a cloud of gas, ice and ...
Combi, Michael R., Tenishev, Valeriy, Martin Rubin, Valeriy Tenishev, Rubin, Martin, Michael R. Combi   +5 more
core   +1 more source

Comet P/2021 HS (PANSTARRS) and the Challenge of Detecting Low-activity Comets

The Planetary Science Journal, 2023
Jupiter-family comet (JFC) P/2021 HS (PANSTARRS) only exhibits a coma within a few weeks of its perihelion passage at 0.8 au, which is atypical for a comet.
Quanzhi Ye, Michael S. P. Kelley, James M. Bauer, Tony L. Farnham, Dennis Bodewits, Luca Buzzi, Robert Weryk, Frank J. Masci, Michael S. Medford, Reed Riddle, Avery Wold   +10 more
doaj   +1 more source

Morphology of Cometary Dust Coma and Tail [PDF]

International Astronomical Union Colloquium, 1996
AbstractThis paper summarizes some recent progress in our understanding of the morphological diversity of dust comets. This diversity is a product of dust emission from discrete active areas on the nucleus surface and provides information on the comet's rotation state and source function.
openaire   +1 more source

Cometary coma dust size distribution from in situ IR spectra [PDF]

, 2017
Dust is the most abundant component in cometary comae. Here, we investigate the dust size distribution in 67P/Churyumov-Gerasimenko (67P/CG) using data from the Rosetta spacecraft that was in close proximity to the comet from 2014 August to 2016 ...
Erard S., C. Leyrat, Taylor, F., Leyrat, C, Erard, S., Ciarniello M., G. Filacchione, Erard, S, Salatti, M, Filacchione, G, Taylor F., Filacchione G., Longobardo, A, Ciarniello, M., D’Aversa, E, Capria, Mt, Taylor, F, Della Corte, V., Rinaldi, G., Rinaldi, G, Rotundi A., S. L. Ivanovski, M. Ciarniello, Capaccioni, F., Leyrat C., Ciarniello, M, Rinaldi G., Bockelée-Morvan, D., Filacchione, G., Tozzi, G., Ivanovski, S., Fulle, M, F. Capaccioni, S. Mottola, Fulle, M., S. Erard, D’aversa, E., Tozzi G. ~P., Rotundi, A, Capria M. ~T., Salatti M., Capria, M., Capaccioni F., Della Corte V., Ivanovski S. ~L. Bockel'ee-Morvan D., Salatti, M., Palomba E., M. Salatti, Longobardo, A., Bockelée-Morvan, D, E. Palomba, V. Della Corte, A. Rotundi, Leyrat, C., Mottola, S, Mottola S., F. Taylor, Rotundi, A., Mottola, S., E. D’Aversa, Della Corte, V, D'Aversa E., Palomba, E., Tozzi, Gp, M. Fulle, Longobardo A., Ivanovski, Sl, M. T. Capria, G. Rinaldi, Fulle M., D. Bockelée-Morvan, G. P. Tozzi, Capaccioni, F, A. Longobardo, Palomba, E   +74 more
core   +1 more source

Heliotropic dust rings for Earth climate engineering [PDF]

, 2013
This paper examines the concept of a Sun-pointing elliptical Earth ring comprised of dust grains to offset global warming. A new family of non-Keplerian periodic orbits, under the effects of solar radiation pressure and the Earth's J(2) oblateness ...
Bewick, Russell, Colombo, Camilla, Sanchez Cuartielles, Joan-Pau, McInnes, Colin, Bewick, Charlotte   +4 more
core   +4 more sources