English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Surface evolution of the Anhur region on comet 67P/Churyumov-Gerasimenko from high-resolution OSIRIS images

Fornasier, S., Feller, C., Hasselmann, P. H., Barucci, M. A., Sunshine, J., Vincent, J.-B., et al. (2019). Surface evolution of the Anhur region on comet 67P/Churyumov-Gerasimenko from high-resolution OSIRIS images. Astronomy and Astrophysics, 630: A13. doi:10.1051/0004-6361/201834824.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0005-0A06-A Version Permalink: http://hdl.handle.net/21.11116/0000-0005-0A07-9
Genre: Journal Article

Files

show Files

Locators

show
hide
Locator:
Astrophysics Data System (ADS) (Abstract)
Description:
-

Creators

show
hide
 Creators:
Fornasier, S., Author
Feller, C., Author
Hasselmann, P. H., Author
Barucci, M. A., Author
Sunshine, J., Author
Vincent, J.-B., Author
Shi, Xian1, Author              
Sierks, Holger1, Author              
Naletto, G., Author
Lamy, P. L., Author
Rodrigo, R., Author
Koschny, D., Author
Davidsson, B., Author
Bertaux, J.-L., Author
Bertini, I., Author
Bodewits, D., Author
Cremonese, G., Author
Da Deppo, V. , Author
Debei, S., Author
De Cecco, M. , Author
Deller, Jakob1, Author              Ferrari, S., AuthorFulle, M., AuthorGutierrez, P. J., AuthorGüttler, Carsten1, Author              Ip, W.-H., AuthorJorda, L., AuthorKeller, H. U., AuthorLara, M. L., AuthorLazzarin, M., AuthorLopez Moreno, J. J. , AuthorLucchetti, A., AuthorMarzari, F., AuthorMottola, S., AuthorPajola, M., AuthorToth, I., AuthorTubiana, Cecilia1, Author               more..
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

Content

show
hide
Free keywords: comets: individual: 67P/Churyumov-Gerasimenko methods: data analysis methods: observational techniques: photometric techniques: imaging spectroscopy
 MPIS_PROJECTS: ROSETTA: OSIRIS
 Abstract: Context. The southern hemisphere of comet 67P/Churyumov-Gerasimenko (67P) became observable by the Rosetta mission in March 2015, a few months before cometary southern vernal equinox. The Anhur region in the southern part of the comet’s larger lobe was found to be highly eroded, enriched in volatiles, and highly active. Aims. We analyze high-resolution images of the Anhur region pre- and post-perihelion acquired by the OSIRIS imaging system on board the Rosetta mission. The Narrow Angle Camera is particularly useful for studying the evolution in Anhur in terms of morphological changes and color variations. Methods. Radiance factor images processed by the OSIRIS pipeline were coregistered, reprojected onto the 3D shape model of the comet, and corrected for the illumination conditions. Results. We find a number of morphological changes in the Anhur region that are related to formation of new scarps; removal of dust coatings; localized resurfacing in some areas, including boulders displacements; and vanishing structures, which implies localized mass loss that we estimate to be higher than 50 million kg. The strongest changes took place in and nearby the Anhur canyon-like structure, where significant dust cover was removed, an entire structure vanished, and many boulders were rearranged. All such changes are potentially associated with one of the most intense outbursts registered by Rosetta during its observations, which occurred one day before perihelion passage. Moreover, in the niche at the foot of a new observed scarp, we also see evidence of water ice exposure that persisted for at least six months. The abundance of water ice, evaluated from a linear mixing model, is relatively high (>20%). Our results confirm that the Anhur region is volatile-rich and probably is the area on 67P with the most pristine exposures near perihelion.

Details

show
hide
Language(s): eng - English
 Dates: 2019
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1051/0004-6361/201834824
arXiv: 1903.09017
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Les Ulis Cedex A France : EDP Sciences
Pages: - Volume / Issue: 630 Sequence Number: A13 Start / End Page: - Identifier: Other: 1432-0746
ISSN: 0004-6361
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1