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Seasonal variations in source regions of the dust jets on comet 67P/Churyumov-Gerasimenko
Natl Cent Univ, Grad Inst Space Sci, Taoyuan 32001, Taiwan.
Natl Cent Univ, Grad Inst Space Sci, Taoyuan 32001, Taiwan;Natl Cent Univ, Inst Astron, Taoyuan 32001, Taiwan;Macau Univ Sci & Technol, Space Sci Inst, Macau, Peoples R China.
Natl Cent Univ, Dept Earth Sci, Taoyuan 32001, Taiwan.
Natl Cent Univ, Inst Astron, Taoyuan 32001, Taiwan.
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2019 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 630, article id A17Article in journal (Refereed) Published
Abstract [en]

Aims: 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.

Results: 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.

Conclusions: 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.

Place, publisher, year, edition, pages
EDP SCIENCES S A , 2019. Vol. 630, article id A17
Keywords [en]
comets: individual: 67P/Churyumov-Gerasimenko
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-395682DOI: 10.1051/0004-6361/201732094ISI: 000486989400017OAI: oai:DiVA.org:uu-395682DiVA, id: diva2:1365415
Funder
Swedish National Space BoardAvailable from: 2019-10-24 Created: 2019-10-24 Last updated: 2019-10-24Bibliographically approved

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Rickman, HansDavidsson, Björn

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