Multidisciplinary analysis of the Hapi region located on Comet 67P/Churyumov-Gerasimenko

M. Pajola; J. C. Lee; N. Oklay; S. F. Hviid; L. Penasa; S. Mottola; X. Shi; S. Fornasier; B. Davidsson; L. Giacomini; A. Lucchetti; M. Massironi; J. B. Vincent; I. Bertini; G. Naletto; W. H. Ip; H. Sierks; P. L. Lamy; R. Rodrigo; D. Koschny; H. U. Keller; J. Agarwal; M. A. Barucci; J. L. Bertaux; D. Bodewits; P. Cambianica; G. Cremonese; V. Da Deppo; S. Debei; M. De Cecco; J. Deller; M. R. El Maarry; C. Feller; S. Ferrari; M. Fulle; P. J. Gutierrez; C. Güttler; L. M. Lara; F. La Forgia; M. Lazzarin; Z. Y. Lin; J. J. Lopez Moreno; F. Marzari; F. Preusker; F. Scholten; I. Toth; C. Tubiana

doi:10.1093/mnras/stz446

Multidisciplinary analysis of the Hapi region located on Comet 67P/Churyumov-Gerasimenko

M. Pajola, J. C. Lee, N. Oklay, S. F. Hviid, L. Penasa, S. Mottola, X. Shi, S. Fornasier, B. Davidsson, L. Giacomini, A. Lucchetti, M. Massironi, J. B. Vincent, I. Bertini, G. Naletto, W. H. Ip, H. Sierks, P. L. Lamy, R. Rodrigo, D. KoschnyH. U. Keller, J. Agarwal, M. A. Barucci, J. L. Bertaux, D. Bodewits, P. Cambianica, G. Cremonese, V. Da Deppo, S. Debei, M. De Cecco, J. Deller, M. R. El Maarry, C. Feller, S. Ferrari, M. Fulle, P. J. Gutierrez, C. Güttler, L. M. Lara, F. La Forgia, M. Lazzarin, Z. Y. Lin, J. J. Lopez Moreno, F. Marzari, F. Preusker, F. Scholten, I. Toth, C. Tubiana

Graduate Institute of Astronomy

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

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.

Original language	English
Pages (from-to)	2139-2154
Number of pages	16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	485
Issue number	2
DOIs	https://doi.org/10.1093/mnras/stz446
State	Published - 15 Feb 2019

Keywords

Comets: individual (67P C-G)
Methods: data analysis
Methods: statistical

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Pajola, M., Lee, J. C., Oklay, N., Hviid, S. F., Penasa, L., Mottola, S., Shi, X., Fornasier, S., Davidsson, B., Giacomini, L., Lucchetti, A., Massironi, M., Vincent, J. B., Bertini, I., Naletto, G., Ip, W. H., Sierks, H., Lamy, P. L., Rodrigo, R., ... Tubiana, C. (2019). Multidisciplinary analysis of the Hapi region located on Comet 67P/Churyumov-Gerasimenko. Monthly Notices of the Royal Astronomical Society, 485(2), 2139-2154. https://doi.org/10.1093/mnras/stz446

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title = "Multidisciplinary analysis of the Hapi region located on Comet 67P/Churyumov-Gerasimenko",

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.",

keywords = "Comets: individual (67P C-G), Methods: data analysis, Methods: statistical",

author = "M. Pajola and Lee, {J. C.} and N. Oklay and Hviid, {S. F.} and L. Penasa and S. Mottola and X. Shi and S. Fornasier and B. Davidsson and L. Giacomini and A. Lucchetti and M. Massironi and Vincent, {J. B.} and I. Bertini and G. Naletto and Ip, {W. H.} and H. Sierks and Lamy, {P. L.} and R. Rodrigo and D. Koschny and Keller, {H. U.} and J. Agarwal and Barucci, {M. A.} and Bertaux, {J. L.} and D. Bodewits and P. Cambianica and G. Cremonese and {Da Deppo}, V. and S. Debei and {De Cecco}, M. and J. Deller and {El Maarry}, {M. R.} and C. Feller and S. Ferrari and M. Fulle and Gutierrez, {P. J.} and C. G{\"u}ttler and Lara, {L. M.} and {La Forgia}, F. and M. Lazzarin and Lin, {Z. Y.} and {Lopez Moreno}, {J. J.} and F. Marzari and F. Preusker and F. Scholten and I. Toth and C. Tubiana",

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Pajola, M, Lee, JC, Oklay, N, Hviid, SF, Penasa, L, Mottola, S, Shi, X, Fornasier, S, Davidsson, B, Giacomini, L, Lucchetti, A, Massironi, M, Vincent, JB, Bertini, I, Naletto, G, Ip, WH, Sierks, H, Lamy, PL, Rodrigo, R, Koschny, D, Keller, HU, Agarwal, J, Barucci, MA, Bertaux, JL, Bodewits, D, Cambianica, P, Cremonese, G, Da Deppo, V, Debei, S, De Cecco, M, Deller, J, El Maarry, MR, Feller, C, Ferrari, S, Fulle, M, Gutierrez, PJ, Güttler, C, Lara, LM, La Forgia, F, Lazzarin, M, Lin, ZY, Lopez Moreno, JJ, Marzari, F, Preusker, F, Scholten, F, Toth, I & Tubiana, C 2019, 'Multidisciplinary analysis of the Hapi region located on Comet 67P/Churyumov-Gerasimenko', Monthly Notices of the Royal Astronomical Society, vol. 485, no. 2, pp. 2139-2154. https://doi.org/10.1093/mnras/stz446

TY - JOUR

T1 - Multidisciplinary analysis of the Hapi region located on Comet 67P/Churyumov-Gerasimenko

AU - Pajola, M.

AU - Lee, J. C.

AU - Oklay, N.

AU - Hviid, S. F.

AU - Penasa, L.

AU - Mottola, S.

AU - Shi, X.

AU - Fornasier, S.

AU - Davidsson, B.

AU - Giacomini, L.

AU - Lucchetti, A.

AU - Massironi, M.

AU - Vincent, J. B.

AU - Bertini, I.

AU - Naletto, G.

AU - Ip, W. H.

AU - Sierks, H.

AU - Lamy, P. L.

AU - Rodrigo, R.

AU - Koschny, D.

AU - Keller, H. U.

AU - Agarwal, J.

AU - Barucci, M. A.

AU - Bertaux, J. L.

AU - Bodewits, D.

AU - Cambianica, P.

AU - Cremonese, G.

AU - Da Deppo, V.

AU - Debei, S.

AU - De Cecco, M.

AU - Deller, J.

AU - El Maarry, M. R.

AU - Feller, C.

AU - Ferrari, S.

AU - Fulle, M.

AU - Gutierrez, P. J.

AU - Güttler, C.

AU - Lara, L. M.

AU - La Forgia, F.

AU - Lazzarin, M.

AU - Lin, Z. Y.

AU - Lopez Moreno, J. J.

AU - Marzari, F.

AU - Preusker, F.

AU - Scholten, F.

AU - Toth, I.

AU - Tubiana, C.

PY - 2019/2/15

Y1 - 2019/2/15

N2 - 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.

AB - 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.

KW - Comets: individual (67P C-G)

KW - Methods: data analysis

KW - Methods: statistical

UR - http://www.scopus.com/inward/record.url?scp=85067074360&partnerID=8YFLogxK

U2 - 10.1093/mnras/stz446

DO - 10.1093/mnras/stz446

M3 - 期刊論文

AN - SCOPUS:85067074360

SN - 0035-8711

VL - 485

SP - 2139

EP - 2154

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

Multidisciplinary analysis of the Hapi region located on Comet 67P/Churyumov-Gerasimenko

Abstract

Keywords

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