Results 21 to 30 of about 32,395 (222)

A numerical model of cometary dust coma structures [PDF]

Astronomy and Astrophysics, 2010
Aims. The purpose of this study is to test our numerical model of cometary dust coma structures and to use the results to infer information about the nucleus surface activity of comet 9P/Tempel 1. Methods. Parameters on the activity were first estimated from simulations of ground-based observation acquired during the preperihelion period (January to ...
Vincent, J., Böhnhardt, H., Lara, L.
openaire   +2 more sources

SPECIFIC FEATURES OF STRUCTURES IN THE INNER COMA OF COMET C/2017 T2 (PANSTARRS) AS OBSERVED WITH THE OMT-800 TELESCOPE OF THE ODESSA OBSERVATORY TELESCOPE NETWORK

Odessa Astronomical Publications, 2020
Observations of the comet were carried out using the OMT-800 telescope (the primary mirror diameter D = 80 cm; the focal length F = 214 cm) of the Odessa Observatory telescope network from January to June 2020.
V. V. Kleshchenok, S. G. Kashuba, S. M. Andrievsky, Yu. M. Gorbanev   +3 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

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

Evolution of the Dust Coma in Comet 67P/Churyumov-Gerasimenko Before 2009 Perihelion

, 2011
Comet 67P/Churyumov-Gerasimenko is the main target of ESA's Rosetta mission and will be encountered in May 2014. As the spacecraft shall be in orbit the comet nucleus before and after release of the lander {\it Philae}, it is necessary necessary to know ...
Agarwal, Agarwal, A’Hearn, Combi, Crifo, Davidsson, Foster, Fulle, Fulle, G. P. Tozzi, Glassmeier, H. Boehnhardt, Hadamcik, Hadamcik, Ishiguro, J. Licandro, J. Stüwe, J.-B. Vincent, Kelley, Kelley, Kidger, Kidger, L. Kolokolova, Lamy, Lamy, Lamy, Lara, Lara, Levasseur-Regourd, Moreno, P. Patriarchi, R. Schulz, Schleicher, Schleicher, Schulz, Tozzi, Tozzi, Tubiana, Tubiana, Weiler   +39 more
core   +1 more source

Dust–dust collisions in cometary comas: applications to comet 67P/Churyumov–Gerasimenko

Monthly Notices of the Royal Astronomical Society
ABSTRACT Silica has emerged as a crucial component within inner comet comas. This work investigates silica dust aggregates and their interactions within cometary comas. We study the probability that aggregates in the size range 1–100 µm collide with each other in the coma and analyse the outcomes of such collisions by using the ...
María Belén Planes, M Gabriela Parisi, Emmanuel N Millán, Eduardo M Bringa, Marcela Cañada-Assandri   +4 more
openaire   +3 more sources

Six Outbursts of Comet 46P/Wirtanen

The Planetary Science Journal, 2021
Cometary activity is a manifestation of sublimation-driven processes at the surface of nuclei. However, cometary outbursts may arise from other processes that are not necessarily driven by volatiles.
Michael S. P. Kelley, Tony L. Farnham, Jian-Yang Li, Dennis Bodewits, Colin Snodgrass, Johannes Allen, —, Eric C. Bellm, Michael W. Coughlin, Andrew J. Drake, Dmitry A. Duev, Matthew J. Graham, Thomas Kupfer, Frank J. Masci, Dan Reiley, Richard Walters, Zwicky Transient Facility Collaboration, M. Dominik, U. G. Jørgensen, A. E. Andrews, N. Bach-Møller, V. Bozza, M. J. Burgdorf, J. Campbell-White, S. Dib, Y. I. Fujii, T. C. Hinse, M. Hundertmark, E. Khalouei, P. Longa-Peña, M. Rabus, S. Rahvar, S. Sajadian, J. Skottfelt, J. Southworth, J. Tregloan-Reed, E. Unda-Sanzana, MiNDSTEp Collaboration   +37 more
doaj   +1 more source

Wide-field polarization imaging and numerical modeling of the coma and tail of comet C/2023 A3 (Tsuchinshan-ATLAS)

Astronomy & Astrophysics
Context. Imaging polarimetry enables the spatially resolved investigation of cometary dust properties across different morphological structures. While cometary comae have been studied thoroughly in the pertinent literature, cometary tails have remained ...
Arnaut M., Wöhler C., Halder P., Ahuja G., Ganesh S., Bhatt M.   +5 more
doaj   +1 more source

A Comprehensive Model of Morphologically Realistic Cosmic Dust Particles: An Application to Mimic the Unusual Polarization Properties of the Interstellar Comet 2I/Borisov

The Astrophysical Journal, 2023
The cosmic dust particles found in space are mainly porous aggregates of smaller grains. Theoretically, these aggregates are replicated using fractal geometry, assuming a cluster of spheres.
Prithish Halder, Sujan Sengupta
doaj   +1 more source

Transient Fragments in Outbursting Comet 17P/Holmes

, 2010
We present results from a wide-field imaging campaign at the Canada-France-Hawaii Telescope to study the spectacular outburst of comet 17P/Holmes in late 2007.
Boehnhardt, Buzzi, David Jewitt, Holmes, Hsieh, Ivezić, Jan Kleyna, Jewitt, Jewitt, Lamy, Lamy, Larson, Moreno, Rachel Stevenson, Richardson, Schleicher, Schleicher, Wilkening   +17 more
core   +1 more source