Results 11 to 20 of about 3,688 (211)

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   +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

Physical properties of cometary dust from Monte Carlo analysis of tail and coma images

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2011
Forward and inverse Monte Carlo modeling of cometary dust tail and coma images has provided one of the best approaches to infer the basic physical dust parameters and their time dependence: mass loss rates, ejection velocities, and size distribution ...
F. Moreno
doaj   +2 more sources

The Role of Benzonitrile Chlorination Explored by Dissociative Electron Attachment. [PDF]

Chemphyschem
Experimental and theoretical dissociative electron attachment study of 2‐ and 4‐chlorobenzonitrile. The dissociative electron attachment process to ortho‐ and para‐chlorobenzonitrile was investigated in the 0–12 eV energy range with a crossed‐beam time‐of‐flight mass spectrometer, supported by quantum chemical scattering calculations.
Guerra P, Mendes M, de Miranda EGF, Rodrigues R, Cornetta LM, da Silva FF.   +5 more
europepmc   +2 more sources

Optical Imaging Polarimetry of Comet 21P/Giacobini–Zinner during Its 2018 Apparition

The Planetary Science Journal, 2023
We conducted polarimetric observations of comet 21P/Giacobini–Zinner in the optical wavelength region using the polarimetric imager PICO equipped with the 50 cm telescope for Public Outreach at the Mitaka Campus of the National Astronomical Observatory ...
Yoshiharu Shinnaka, Hideyo Kawakita, Hitomi Kobayashi, Reiko Furusho, Jun-ichi Watanabe   +4 more
doaj   +1 more source

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
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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

Large-scale dust jets in the coma of 67P/Churyumov-Gerasimenko as seen by the OSIRIS instrument onboard Rosetta [PDF]

, 2015
During the most recent perihelion passage in 2009 of comet 67P/Churyumov-Gerasimenko (67P), ground-based observations showed an anisotropic dust coma where jet-like features were detected at ~ 1.3 AU from the Sun.
Lin, Z. -Y, Guettler, C., S. Fornasier, S. Lowry, A.-T. Auger, BERTINI, IVANO, M. Küppers, Kovacs, G., B. Davidsson, FULLE, Marco, Thomas, Nicolas, Küppers, M., Keller, H. U., A'Hearn, M. F.,, Barucci, M.A., Lamy, P.L., Lin, Z.-Y., A’Hearn, M. F., A’Hearn, M. F., Ip, W., Moissl–fraund, R., J.-L. Bertaux, Debei, S., Pajola, M., O. Groussin, Moissl-Fraund, R., Lamy, P. L., Vincent, J.B., De Cecco, M.,, Kramm, J. -R, El-Maarry, M., Auger, A. -T., Gutierrez-Marques, P.,, Guettler, C.,, Moissl-Fraund, R.,, A. Pommerol, Auger, A. -T,, I. Bertini, Lara, L., J.-B. Vincent, M. Lazzarin, Michalik, H.,, Lin, Z.–Y., M. D. Sabau, M. De Cecco, Kueppers, M., Tubiana, C., El-Maarry, Mohamed Ramy, Sabau, M., C. Güttler, Elmaarry, Mohamed Ramy, El-Maarry, M. R., Ferri, F.,, Groussin, O., Kueppers, M.,, El-Maarry, M. R.,, D. Koschny, Ferri, F., Vincent, J. -B, Kuehrt, E.,, Michalik, H., Bertaux, J.-L., A'Hearn, Michael F., J. J. López-Moreno, H. U. Keller, Gutiérrez-Marques, P., Kramm, J. R., N. Oklay, Koschny, D.,, Gutierrez, P. J.,, Bertaux, Jean-Loup, Gutierrez, P. J., Auger, A. T., Barbieri, C., Lowry, S., Thomas, N.,, A'Hearn, M. F., E. Kührt, Tubiana, C.,, Lamy, P. L.,, Gutierrez, P., M. A. Barucci, Sabau, M.D., Ip, W.-H., Fornasier, S., Besse, S., D. Bodewits, Ip, W. -H, Bodewits, D.,, FERRI, FRANCESCA, Agarwal, J., Jorda, L., Magrin, S., Barbieri, C.,, Rodrigo, R.,, Keller, H.U., Ip, W. -H., Lin, Z., López Moreno, J. J., Kramm, J., W. H., Ip, Bertaux, J., H. Sierks, S. Magrin, PAJOLA, MAURIZIO, C. Barbieri, Cremonese, G., Moreno, F., Sierks, H.,, Marzari, F.,, Mottola, S.,, Pommerol, A.,, P. Gutiérrez–Marques, L. M. Lara, Rozek, A.,, F. Ferri, Hviid, S.F., Z.-Y. Lin, Küppers, M., La Forgia, F., A'Hearn, M., M. Fulle, N. Thomas, Knollenberg, J.,, Bertini, I.,, Ro ̇zek, A., Marzari, F., J. Agarwal, Ro˙zek, A., Lamy, P., Kuehrt, E., Oklay, N.,, A'Hearn, M.F., Bertaux, J. -L., Gutierrez, P.J., Debei, S.,, G. Naletto, Sierks, H., López-Moreno, J. J., C. Tubiana, Pommerol, A., Lin, Z. Y., Davidsson, B., Bertaux, J. -L, Naletto, G., A. Rożek, El Maarry, M. R., MARZARI, FRANCESCO, El-Maarry, M.R., A’Hearn, M.F., Rożek, A., Sabau, M. D., Vincent, J.-B., H. Michalik, Fulle, M., Gutiérrez, P. J., Bodewits, Dennis, Hviid, S., Knollenberg, J., LA FORGIA, FIORANGELA, Thomas, N., DEBEI, STEFANO, Kührt, E., Vincent, J., Naletto, G.,, S. Besse, Fulle, M.,, Lopez-Moreno, J., Groussin, O.,, R. Rodrigo, M. Pajola, Kramm, J.-R., V. Da Deppo, La Forgia, F.,, Barucci, M., Lowry, S.,, Lara, L.M., Da Deppo, V., BARBIERI, CESARE, Vincent, J. -B., M. F. A’Hearn, Rodrigo, R., H. Rickman, Bertaux, J.–L., Rickman, H., Pommerol, Antoine, MAGRIN, SARA, Jorda, L.,, Kührt, E., Güttler, C., Barucci, M. A., J. Knollenberg, R. Moissl–Fraund, Barucci, M. A.,, De Cecco, M., Fornasier, S.,, Besse, S.,, López-Moreno, J.J., Lazzarin, M., NALETTO, GIAMPIERO, Gutiérrez–marques, P., Lazzarin, M.,, W.-H. Ip, DA DEPPO, VANIA, Koschny, D., P. J. Gutiérrez, P. L. Lamy, J.-R. Kramm, Oklay, N., Auger, A., Moreno, F.,, Kovacs, G.,, Rickman, Hans,, Bertini, I., Lin, Z. -Y., Moissl–Fraund, R., F. Marzari, L. Jorda, Kührt, Ekkehard, S. Mottola, S. F. Hviid, Kramm, J. -R., F. Moreno, Bodewits, D., Ip, W. H., S. Debei, Lopez-Moreno, J. J.,, Pajola, M.,, Da Deppo, V.,, Lara, L. M.,, Keller, H. U.,, Bertaux, J. L., Magrin, S.,, Cremonese, Gabriele, Sabau, M. D.,, G. Cremonese, M. R. El-Maarry, Keller, H., López Moreno, J. J., Gutiérrez–Marques, P., G. Kovacs, F. La Forgia, Cremonese, G.,, Mottola, S., Güttler, C., LAZZARIN, MONICA, Auger, A.-T., Hviid, S. F.,, Lara, L. M., Davidsson, Björn,, Agarwal, J.,, Vincent, J. B., Hviid, S. F.   +252 more
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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   +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