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  1. OA@INAF
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  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28812
Title: Multidisciplinary analysis of the Hapi region located on Comet 67P/Churyumov-Gerasimenko
Authors: PAJOLA, MAURIZIO 
Lee, J. -C.
Oklay, N.
Hviid, S. F.
Penasa, L.
Mottola, S.
Shi, X.
Fornasier, S.
Davidsson, B.
GIACOMINI, LIVIA 
LUCCHETTI, ALICE 
Massironi, M.
Vincent, J. B.
Bertini, I.
Naletto, G.
Ip, W. H.
Sierks, H.
Lamy, P. L.
Rodrigo, R.
Koschny, D.
Keller, H. U.
Agarwal, J.
Barucci, M. A.
Bertaux, J. L.
Bodewits, D.
CAMBIANICA, PAMELA 
CREMONESE, Gabriele 
Da Deppo, V.
Debei, S.
De Cecco, M.
Deller, J.
El Maarry, M. R.
Feller, C.
Ferrari, S.
FULLE, Marco 
Gutierrez, P. J.
Güttler, C.
Lara, L. M.
La Forgia, F.
Lazzarin, M.
Lin, Z. -Y.
Lopez Moreno, J. J.
Marzari, F.
Preusker, F.
Scholten, F.
Toth, I.
Tubiana, C.
Issue Date: 2019
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 485
Issue: 2
First Page: 2139
Abstract: By using the Rosetta/OSIRIS-NAC data set taken in 2014 August, we focus on the neck region, called Hapi, located on 67P Churyumov-Gerasimenko's Northern hemisphere. The gravitational potential and slopes of Hapi, coupled with the geological unit identification and the boulder size-frequency distributions, support the interpretation that both taluses and gravitational accumulation deposits observable on Hapi are the result of multiple cliff collapses that occurred at different times. By contrast, the fine-particle deposits observable in the central part of the study area are made of aggregates coming from the Southern hemisphere and deposited during each perihelion passage. Both the consolidated terrains on the western part of Hapi, as well as the centrally aligned ridge made of boulder-like features, suggest that Hapi is in structural continuity with the onion-like structure of the main lobe of 67P. Despite the dusty blanket observable on Hapi, its terrains are characterized by water-ice-rich components that, once repeatedly and rapidly illuminated, sublimate, hence resulting in the strong jet activity observed in 2014 August.
URI: http://hdl.handle.net/20.500.12386/28812
URL: https://academic.oup.com/mnras/article/485/2/2139/5371141
ISSN: 0035-8711
DOI: 10.1093/mnras/stz446
Bibcode ADS: 2019MNRAS.485.2139P
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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