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http://hdl.handle.net/20.500.12386/32990
Title: | Radial Distribution of the Dust Comae of Comets 45P/Honda-Mrkos-Pajdus̆áková and 46P/Wirtanen | Authors: | Lejoly, C. Harris, W. Samarasinha, N. Mueller, B. E. A. Howell, E. Bodnarik, J. Springmann, A. Kareta, T. Sharkey, B. Noonan, J. BEDIN, Luigi Bosch, J. -G. Brosio, A. Bryssinck, E. de Vanssay, J. -B. Hambsch, F. -J. Ivanova, O. Krushinsky, V. Lin, Z. -Y. Manzini, F. Maury, A. Moriya, N. Ochner, P. Oldani, V. |
Issue Date: | 2022 | Journal: | THE PLANETARY SCIENCE JOURNAL | Number: | 3 | Issue: | 1 | First Page: | 17 | Abstract: | There was an unprecedented opportunity to study the inner dust coma environments, where the dust and gas are not entirely decoupled, of comets 45P/Honda-Mrkos-Pajdus̆áková (45P/HMP) from 2016 December 26 to 2017 March 15, and 46P/Wirtanen from 2018 November 10 to 2019 February 13, both in visible wavelengths. The radial profile slopes of these comets were measured in the R and HB-BC filters most representative of dust, and deviations from a radially expanding coma were identified as significant. The azimuthally averaged radial profile slope of comet 45P/HMP gradually changes from -1.81 ± 0.20 at 5.24 days preperihelion to -0.35 ± 0.16 at 74.41 days postperihelion. Contrastingly, the radial profile slope of 46P/Wirtanen stays fairly constant over the observed time period at -1.05 ± 0.05. Additionally, we find that the radial profile of 46P/Wirtanen is azimuthally dependent on the sky-plane-projected solar position angle, while that of 45P/HMP is not. These results suggest that comets 45P/HMP and 46P/Wirtanen have vastly different coma dust environments and that their dust expansion properties are distinct. As evident from these two comets, well-resolved inner comae are vital for detailed characterization of dust environments. | URI: | http://hdl.handle.net/20.500.12386/32990 | URL: | https://iopscience.iop.org/article/10.3847/PSJ/ac4501 https://api.elsevier.com/content/abstract/scopus_id/85123710546 |
ISSN: | 2632-3338 | DOI: | 10.3847/PSJ/ac4501 | Bibcode ADS: | 2022PSJ.....3...17L | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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Lejoly_2022_Planet._Sci._J._3_17.pdf | Pdf editoriale | 2.25 MB | Adobe PDF | View/Open |
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