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dc.contributor.authorLi (李荐扬), Jian-Yang
dc.contributor.authorReddy, Vishnu
dc.contributor.authorNathues, Andreas
dc.contributor.authorCorre, Lucille Le
dc.contributor.authorIzawa, Matthew R. M.
dc.contributor.authorCloutis, Edward A.
dc.contributor.authorSykes, Mark V.
dc.contributor.authorCarsenty, Uri
dc.contributor.authorCastillo-Rogez, Julie C.
dc.contributor.authorHoffmann, Martin
dc.contributor.authorJaumann, Ralf
dc.contributor.authorKrohn, Katrin
dc.contributor.authorMottola, Stefano
dc.contributor.authorPrettyman, Thomas H.
dc.contributor.authorSchaefer, Michael
dc.contributor.authorSchenk, Paul
dc.contributor.authorSchröder, Stefan E.
dc.contributor.authorWilliams, David A.
dc.contributor.authorSmith, David E.
dc.contributor.authorKonopliv, Alexander S.
dc.contributor.authorPark, Ryan S.
dc.contributor.authorRaymond, Carol A.
dc.contributor.authorRussell, Christopher T.
dc.contributor.authorZuber, Maria
dc.date.accessioned2017-04-21T19:23:29Z
dc.date.available2017-04-21T19:23:29Z
dc.date.issued2016-01
dc.date.submitted2015-12
dc.identifier.issn2041-8213
dc.identifier.issn2041-8205
dc.identifier.urihttp://hdl.handle.net/1721.1/108361
dc.description.abstractPrevious observations suggested that Ceres has active, but possibly sporadic, water outgassing as well as possibly varying spectral characteristics over a timescale of months. We used all available data of Ceres collected in the past three decades from the ground and the Hubble Space Telescope, as well as the newly acquired images by the Dawn  Framing Camera, to search for spectral and albedo variability on Ceres, on both a global scale and in local regions, particularly the bright spots inside the Occator crater, over timescales of a few months to decades. Our analysis has placed an upper limit on the possible temporal albedo variation on Ceres. Sporadic water vapor venting, or any possibly ongoing activity on Ceres, is not significant enough to change the albedo or the area of the bright features in the Occator crater by >15%, or the global albedo by >3% over the various timescales that we searched. Recently reported spectral slope variations can be explained by changing Sun–Ceres–Earth geometry. The active area on Ceres is less than 1 km[superscript 2], too small to cause global albedo and spectral variations detectable in our data. Impact ejecta due to impacting projectiles of tens of meters in size like those known to cause observable changes to the surface albedo on Asteroid Scheila cannot cause detectable albedo change on Ceres due to its relatively large size and strong gravity. The water vapor activity on Ceres is independent of Ceres' heliocentric distance, ruling out the possibility of the comet-like sublimation process as a possible mechanism driving the activity.en_US
dc.language.isoen_US
dc.publisherIOP Publishingen_US
dc.relation.isversionofhttp://dx.doi.org/10.3847/2041-8205/817/2/l22en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceIOP Publishingen_US
dc.titleSURFACE ALBEDO AND SPECTRAL VARIABILITY OF CERESen_US
dc.typeArticleen_US
dc.identifier.citationLi (李荐扬), Jian-Yang et al. “SURFACE ALBEDO AND SPECTRAL VARIABILITY OF CERES.” The Astrophysical Journal 817.2 (2016): L22. © 2016 The American Astronomical Societyen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciencesen_US
dc.contributor.mitauthorZuber, Maria
dc.relation.journalAstrophysical Journal. Lettersen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsLi (李荐扬), Jian-Yang; Reddy, Vishnu; Nathues, Andreas; Corre, Lucille Le; Izawa, Matthew R. M.; Cloutis, Edward A.; Sykes, Mark V.; Carsenty, Uri; Castillo-Rogez, Julie C.; Hoffmann, Martin; Jaumann, Ralf; Krohn, Katrin; Mottola, Stefano; Prettyman, Thomas H.; Schaefer, Michael; Schenk, Paul; Schröder, Stefan E.; Williams, David A.; Smith, David E.; Zuber, Maria T.; Konopliv, Alexander S.; Park, Ryan S.; Raymond, Carol A.; Russell, Christopher T.en_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0003-2652-8017
mit.licensePUBLISHER_POLICYen_US


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