Journal articles

Seasonal variations in source regions of the dust jets on comet 67P/Churyumov-Gerasimenko

I.-L. Lai ¹ W.-H. Ip ^{2, 1, 3} J.-C. Lee ⁴ Z.-Y. Lin ² J.-B. Vincent ⁵ N. Oklay ⁵ H. Sierks ⁶ C. Barbieri ⁷ Philippe Lamy ^{8, 9} R. Rodrigo ^{10, 11} D. Koschny ¹² H. Rickman ^{13, 14} H. U. Keller ¹⁵ J. Agarwal ⁶ M. A. Barucci ¹⁶ Jean-Loup Bertaux ⁸ I. Bertini ¹⁷ Dennis Bodewits ¹⁸ S. Boudreault ⁶ Gabriele Cremonese ¹⁹ V. Da Deppo ²⁰ Björn Davidsson ¹⁴ Stefano Debei ²¹ M. de Cecco ²² Jakob Deller ⁶ Sonia Fornasier ¹⁶ Marco Fulle ²³ Olivier Groussin ⁹ Pedro J. Gutiérrez ²⁴ Carsten Güttler ⁶ M. Hofmann ⁶ Stubbe F. Hviid ⁵ Laurent Jorda ⁹ Jörg Knollenberg ⁵ Gabor Kovacs ⁶ Jörg-Rainer Kramm ⁶ Ekkehard Kührt ⁵ M. Küppers ²⁵ Luisa Maria Lara ²⁴ Monica Lazzarin ¹⁰ Josè J. Lopez-Moreno ²⁴ Francesco Marzari ⁷ Giampiero Naletto ¹⁷ X. Shi ⁶ Cécilia Tubiana ⁶ Nicolas Thomas ²⁶

1 Institute of Space Science [Taiwan]

2 IANCU - Institute of Astronomy [Taiwan]

3 SSI - Space Science Institute [Macau]

4 Department of Atmospheric Sciences [Taoyuan City]

5 DLR Institut für Planetenforschung

6 MPS - Max-Planck-Institut für Sonnensystemforschung

7 Dipartimento di Fisica e Astronomia "Galileo Galilei"

8 PLANETO - LATMOS

LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales

9 LAM - Laboratoire d'Astrophysique de Marseille

10 CAB - Centro de Astrobiologia [Madrid]

11 ISSI - International Space Science Institute [Bern]

12 RSSD - Research and Scientific Support Department, ESTEC

13 CBK - Space Research Centre of Polish Academy of Sciences

14 Department of Physics and Astronomy [Uppsala]

15 IGEP - Institut für Geophysik und Extraterrestrische Physik [Braunschweig]

16 LESIA (UMR_8109) - Laboratoire d'études spatiales et d'instrumentation en astrophysique

17 CISAS - Centro di Ateneo di Studi e Attività Spaziali “Giuseppe Colombo”

18 Department of Physics [Auburn]

19 OAPD - INAF - Osservatorio Astronomico di Padova

20 IFN - CNR Institute for Photonics and Nanotechnologies

21 Department of Industrial Engineering [Padova]

22 University of Trento [Trento]

23 OAT - INAF - Osservatorio Astronomico di Trieste

24 IAA - Instituto de Astrofísica de Andalucía

25 ESAC - European Space Astronomy Centre

26 Physikalisches Institut [Bern]

Abstract : We investigate the surface distribution of the source regions of dust jets on comet 67P/Churyumov-Gerasimenko as a function of time. Methods. The dust jet source regions were traced by the comprehensive imaging data set provided by the OSIRIS scientific camera. We show in detail how the projected footpoints of the dust jets and hence the outgassing zone would move in consonance with the sunlit belt. Furthermore, a number of source regions characterized by repeated jet activity might be the result of local topographical variations or compositional heterogeneities. The spatial and temporal variations in source regions of the dust jets are influenced significantly by the seasonal effect. The strong dependence on the solar zenith angle and local time could be related to the gas sublimation process driven by solar insolation on a surface layer of low thermal inertia.

Document type :

Journal articles

Domain :

Physics [physics]

Sciences of the Universe [physics] / Astrophysics [astro-ph]

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Submitted on : Wednesday, November 11, 2020 - 8:12:58 PM
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