Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko

O. Groussin; H. Sierks; C. Barbieri; P. Lamy; R. Rodrigo; D. Koschny; H. Rickman; H. U. Keller; M. F. A'Hearn; A. T. Auger; M. A. Barucci; J. L. Bertaux; I. Bertini; S. Besse; G. Cremonese; V. Da Deppo; B. Davidsson; S. Debei; M. De Cecco; M. R. El-Maarry; S. Fornasier; M. Fulle; P. J. Gutiérrez; C. Güttler; S. Hviid; W. H. Ip; L. Jorda; J. Knollenberg; G. Kovacs; J. R. Kramm; E. Kührt; M. Küppers; L. M. Lara; M. Lazzarin; J. J. Lopez Moreno; S. Lowry; S. Marchi; F. Marzari; M. Massironi; S. Mottola; G. Naletto; N. Oklay; M. Pajola; A. Pommerol; N. Thomas; I. Toth; C. Tubiana; J. B. Vincent

doi:10.1051/0004-6361/201527020

Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko

O. Groussin, H. Sierks, C. Barbieri, P. Lamy, R. Rodrigo, D. Koschny, H. Rickman, H. U. Keller, M. F. A'Hearn, A. T. Auger, M. A. Barucci, J. L. Bertaux, I. Bertini, S. Besse, G. Cremonese, V. Da Deppo, B. Davidsson, S. Debei, M. De Cecco, M. R. El-MaarryS. Fornasier, M. Fulle, P. J. Gutiérrez, C. Güttler, S. Hviid, W. H. Ip, L. Jorda, J. Knollenberg, G. Kovacs, J. R. Kramm, E. Kührt, M. Küppers, L. M. Lara, M. Lazzarin, J. J. Lopez Moreno, S. Lowry, S. Marchi, F. Marzari, M. Massironi, S. Mottola, G. Naletto, N. Oklay, M. Pajola, A. Pommerol, N. Thomas, I. Toth, C. Tubiana, J. B. Vincent

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摘要

Aims. We report on the first major temporal morphological changes observed on the surface of the nucleus of comet 67P/Churyumov-Gerasimenko in the smooth terrains of the Imhotep region. Methods. We used images of the OSIRIS cameras onboard Rosetta to follow the temporal changes from 24 May 2015 to 11 July 2015. Results. The morphological changes observed on the surface are visible in the form of roundish features that are growing in size from a given location in a preferential direction at a rate of 5.6-8.1 × 10^-5 m s^-1 during the observational period. The location where the changes started and the contours of the expanding features are bluer than the surroundings, which suggests that ices (H₂O and/or CO₂) are exposed on the surface. However, sublimation of ices alone is not sufficient to explain the observed expanding features. No significant variations in the dust activity pattern are observed during the period of changes.

原文	???core.languages.en_GB???
文章編號	A36
期刊	Astronomy and Astrophysics
卷	583
DOIs	https://doi.org/10.1051/0004-6361/201527020
出版狀態	已出版 - 1 11月 2015

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10.1051/0004-6361/201527020

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Groussin, O., Sierks, H., Barbieri, C., Lamy, P., Rodrigo, R., Koschny, D., Rickman, H., Keller, H. U., A'Hearn, M. F., Auger, A. T., Barucci, M. A., Bertaux, J. L., Bertini, I., Besse, S., Cremonese, G., Da Deppo, V., Davidsson, B., Debei, S., De Cecco, M., ... Vincent, J. B. (2015). Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko. Astronomy and Astrophysics, 583, [A36]. https://doi.org/10.1051/0004-6361/201527020

@article{b64215faa02a44a9aa7c129b7bedc486,

title = "Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko",

abstract = "Aims. We report on the first major temporal morphological changes observed on the surface of the nucleus of comet 67P/Churyumov-Gerasimenko in the smooth terrains of the Imhotep region. Methods. We used images of the OSIRIS cameras onboard Rosetta to follow the temporal changes from 24 May 2015 to 11 July 2015. Results. The morphological changes observed on the surface are visible in the form of roundish features that are growing in size from a given location in a preferential direction at a rate of 5.6-8.1 × 10-5 m s-1 during the observational period. The location where the changes started and the contours of the expanding features are bluer than the surroundings, which suggests that ices (H2O and/or CO2) are exposed on the surface. However, sublimation of ices alone is not sufficient to explain the observed expanding features. No significant variations in the dust activity pattern are observed during the period of changes.",

keywords = "Comets: general, Comets: individual: 67P/Churyumov-Gerasimenko, Methods: data analysis",

author = "O. Groussin and H. Sierks and C. Barbieri and P. Lamy and R. Rodrigo and D. Koschny and H. Rickman and Keller, {H. U.} and A'Hearn, {M. F.} and Auger, {A. T.} and Barucci, {M. A.} and Bertaux, {J. L.} and I. Bertini and S. Besse and G. Cremonese and {Da Deppo}, V. and B. Davidsson and S. Debei and {De Cecco}, M. and El-Maarry, {M. R.} and S. Fornasier and M. Fulle and Guti{\'e}rrez, {P. J.} and C. G{\"u}ttler and S. Hviid and Ip, {W. H.} and L. Jorda and J. Knollenberg and G. Kovacs and Kramm, {J. R.} and E. K{\"u}hrt and M. K{\"u}ppers and Lara, {L. M.} and M. Lazzarin and {Lopez Moreno}, {J. J.} and S. Lowry and S. Marchi and F. Marzari and M. Massironi and S. Mottola and G. Naletto and N. Oklay and M. Pajola and A. Pommerol and N. Thomas and I. Toth and C. Tubiana and Vincent, {J. B.}",

note = "Publisher Copyright: {\textcopyright} ESO, 2015.",

year = "2015",

month = nov,

day = "1",

doi = "10.1051/0004-6361/201527020",

language = "???core.languages.en_GB???",

volume = "583",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

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Groussin, O, Sierks, H, Barbieri, C, Lamy, P, Rodrigo, R, Koschny, D, Rickman, H, Keller, HU, A'Hearn, MF, Auger, AT, Barucci, MA, Bertaux, JL, Bertini, I, Besse, S, Cremonese, G, Da Deppo, V, Davidsson, B, Debei, S, De Cecco, M, El-Maarry, MR, Fornasier, S, Fulle, M, Gutiérrez, PJ, Güttler, C, Hviid, S, Ip, WH, Jorda, L, Knollenberg, J, Kovacs, G, Kramm, JR, Kührt, E, Küppers, M, Lara, LM, Lazzarin, M, Lopez Moreno, JJ, Lowry, S, Marchi, S, Marzari, F, Massironi, M, Mottola, S, Naletto, G, Oklay, N, Pajola, M, Pommerol, A, Thomas, N, Toth, I, Tubiana, C & Vincent, JB 2015, 'Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko', Astronomy and Astrophysics, 卷 583, A36. https://doi.org/10.1051/0004-6361/201527020

TY - JOUR

T1 - Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko

AU - Groussin, O.

AU - Sierks, H.

AU - Barbieri, C.

AU - Lamy, P.

AU - Rodrigo, R.

AU - Koschny, D.

AU - Rickman, H.

AU - Keller, H. U.

AU - A'Hearn, M. F.

AU - Auger, A. T.

AU - Barucci, M. A.

AU - Bertaux, J. L.

AU - Bertini, I.

AU - Besse, S.

AU - Cremonese, G.

AU - Da Deppo, V.

AU - Davidsson, B.

AU - Debei, S.

AU - De Cecco, M.

AU - El-Maarry, M. R.

AU - Fornasier, S.

AU - Fulle, M.

AU - Gutiérrez, P. J.

AU - Güttler, C.

AU - Hviid, S.

AU - Ip, W. H.

AU - Jorda, L.

AU - Knollenberg, J.

AU - Kovacs, G.

AU - Kramm, J. R.

AU - Kührt, E.

AU - Küppers, M.

AU - Lara, L. M.

AU - Lazzarin, M.

AU - Lopez Moreno, J. J.

AU - Lowry, S.

AU - Marchi, S.

AU - Marzari, F.

AU - Massironi, M.

AU - Mottola, S.

AU - Naletto, G.

AU - Oklay, N.

AU - Pajola, M.

AU - Pommerol, A.

AU - Thomas, N.

AU - Toth, I.

AU - Tubiana, C.

AU - Vincent, J. B.

PY - 2015/11/1

Y1 - 2015/11/1

N2 - Aims. We report on the first major temporal morphological changes observed on the surface of the nucleus of comet 67P/Churyumov-Gerasimenko in the smooth terrains of the Imhotep region. Methods. We used images of the OSIRIS cameras onboard Rosetta to follow the temporal changes from 24 May 2015 to 11 July 2015. Results. The morphological changes observed on the surface are visible in the form of roundish features that are growing in size from a given location in a preferential direction at a rate of 5.6-8.1 × 10-5 m s-1 during the observational period. The location where the changes started and the contours of the expanding features are bluer than the surroundings, which suggests that ices (H2O and/or CO2) are exposed on the surface. However, sublimation of ices alone is not sufficient to explain the observed expanding features. No significant variations in the dust activity pattern are observed during the period of changes.

AB - Aims. We report on the first major temporal morphological changes observed on the surface of the nucleus of comet 67P/Churyumov-Gerasimenko in the smooth terrains of the Imhotep region. Methods. We used images of the OSIRIS cameras onboard Rosetta to follow the temporal changes from 24 May 2015 to 11 July 2015. Results. The morphological changes observed on the surface are visible in the form of roundish features that are growing in size from a given location in a preferential direction at a rate of 5.6-8.1 × 10-5 m s-1 during the observational period. The location where the changes started and the contours of the expanding features are bluer than the surroundings, which suggests that ices (H2O and/or CO2) are exposed on the surface. However, sublimation of ices alone is not sufficient to explain the observed expanding features. No significant variations in the dust activity pattern are observed during the period of changes.

KW - Comets: general

KW - Comets: individual: 67P/Churyumov-Gerasimenko

KW - Methods: data analysis

UR - http://www.scopus.com/inward/record.url?scp=84946545525&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201527020

DO - 10.1051/0004-6361/201527020

M3 - 期刊論文

AN - SCOPUS:84946545525

SN - 0004-6361

VL - 583

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A36

ER -

Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko

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