Results 11 to 20 of about 296,727 (213)

Dust in the Inner Coma of Comet 67P/Churyumov-Gerasimenko [PDF]

, 2021
The main goal of the work presented in this PhD thesis is to investigate the dust dynamics in the near-nucleus coma of comet 67P/Churyumov-Gerasimenko (67P) and to gain a deeper understanding of the physical processes governing it. In our analyses, we study numerical simulation results of gas and dust comae in combination with image analysis of Rosetta
Gerig, Selina-Barbara
openaire   +2 more sources

Models of Rosetta/OSIRIS 67P Dust Coma Phase Function [PDF]

The Astronomical Journal, 2018
Abstract The phase function of the dust coma of comet 67P has been determined from Rosetta/OSIRIS images. This function shows a deep minimum at phase angles near 100°, and a strong backscattering enhancement. These two properties cannot be reproduced by regular models of cometary dust, most of them based on wavelength-sized and randomly ...
F. Moreno, D. Guirado, O. Muñoz, I. Bertini, C. Tubiana, C. Güttler, M. Fulle, A. Rotundi, V. Della Corte, S. L. Ivanovski, G. Rinaldi, D. Bockelée-Morvan, V. V. Zakharov, J. Agarwal, S. Mottola, I. Toth, E. Frattin, L. M. Lara, P. J. Gutiérrez, Z. Y. Lin, L. Kolokolova, H. Sierks, G. Naletto, P. L. Lamy, R. Rodrigo, D. Koschny, B. Davidsson, M. A. Barucci, J.-L. Bertaux, D. Bodewits, G. Cremonese, V. Da Deppo, S. Debei, M. De Cecco, J. Deller, S. Fornasier, W.-H. Ip, H. U. Keller, M. Lazzarin, J. J. López-Moreno, F. Marzari, X. Shi   +41 more
core   +15 more sources

The Dust in the Coma of Comet Halley [PDF]

International Astronomical Union Colloquium, 1991
Abstract The interstellar dust model of comets is numerically worked out to satisfy several basic constraints provided by observations of comet Halley and to derive the porosity of coma dust. The observational constraints are: (1) the strengths of the 3.4 μm and 9.7 μm emission bands; (2) the relative amount of silicates to organic materials; (3 ...
Joniek I. Hage, J. Mayo Greenberg
openaire   +1 more source

3.5 The Dust Coma of Comets [PDF]

International Astronomical Union Colloquium, 1976
AbstractAnalytical expressions for the dust entrainment in the limits of low and high gas production from cometary nuclei are derived. The resulting volume density is used to evaluate the dust production of Comets Encke and Kohoutek from IR-measurements. It is predicted, that the dust in solar direction was diffuse for Comet Kohoutek during approach to
K.W. Michel, T. Nishimura
openaire   +1 more source

Properties of dust in the coma of Churyumov-Gerasimenko

, 2010
The last apparition of comet 67P/Churyumov-Gerasimenko before the Rosetta spacecraft ren-dezvous in 2014 has taken place in 2008-2009. Observations have therefore been carried out to optimize the mission. In this context, observations of solar light scattered by dust, with em-phasis on polarimetric data, provide comparisons between the dust properties ...
Levasseur-Regourd, Anny Chantal, Hadamcik, Edith, Sen, Asole Kumar, Lasue, Jérémie, Fulle, Marco, Gupta, Rajiv   +5 more
openaire   +2 more sources

CONSTRAINTS ON THE INTRACLUSTER DUST EMISSION IN THE COMA CLUSTER OF GALAXIES [PDF]

The Astrophysical Journal, 2009
We have undertaken a search for the infrared emission from the intracluster dust in the Coma cluster of galaxies by the Multiband Imaging Photometer for Spitzer. Our observations yield the deepest mid and far-infrared images of a galaxy cluster ever achieved.
Kitayama, T., Ito, Y., Okada, Y., Kaneda, H., Takahashi, H., Ota, N., Onaka, T., Tajiri, Y., Nagata, H., Yamada, K.   +9 more
openaire   +3 more sources

Observations of the Dust Coma of Comet C/2009 P1 (GARRADD) by Imaging Polarimetry

, 2012
The dust coma of comet C/2009 P1 was observed by imaging polarimetry in different wavelengths during a period of nearly five months in France and India.
Hadamcik, Edith, Sen, A. K., Levasseur-Regourd, Anny Chantal, Gupta, Rajiv, Lasue, Jérémie, Botet, R.   +5 more
core   +5 more sources

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

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