Seasonal changes of the volatile density in the coma and on the surface of comet 67P/Churyumov–Gerasimenko

Kramer, Tobias; Läuter, Matthias; Rubin, Martin; Altwegg, Kathrin (2017). Seasonal changes of the volatile density in the coma and on the surface of comet 67P/Churyumov–Gerasimenko. Monthly notices of the Royal Astronomical Society, 469(Suppl_2), S20-S28. Oxford University Press 10.1093/mnras/stx866

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Starting from several monthly data sets of Rosetta’s COmetary Pressure Sensor, we reconstruct the gas density in the coma around comet 67P/Churyumov–Gerasimenko. The underlying inverse gas model is constructed by fitting ten thousands of measurements to thousands of potential gas sources distributed across the entire nucleus surface. The ensuing self-consistent solution for the entire coma density and surface activity reproduces the temporal and spatial variations seen in the data for monthly periods with Pearson correlation coefficients of 0.93 and higher. For different seasonal illumination conditions before and after perihelion, we observe a systematic shift of gas sources on the nucleus.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences

UniBE Contributor:

Rubin, Martin and Altwegg, Kathrin

Subjects:

500 Science > 520 Astronomy
600 Technology > 620 Engineering

ISSN:

0035-8711

Publisher:

Oxford University Press

Language:

English

Submitter:

Dora Ursula Zimmerer

Date Deposited:

15 Nov 2017 16:42

Last Modified:

15 Nov 2017 16:42

Publisher DOI:

10.1093/mnras/stx866

BORIS DOI:

10.7892/boris.105804

URI:

https://boris.unibe.ch/id/eprint/105804

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