Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/23209
DC Field | Value | Language |
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dc.contributor.author | CIARNIELLO, Mauro | en_US |
dc.contributor.author | CAPACCIONI, FABRIZIO | en_US |
dc.contributor.author | FILACCHIONE, GIANRICO | en_US |
dc.contributor.author | RAPONI, Andrea | en_US |
dc.contributor.author | TOSI, Federico | en_US |
dc.contributor.author | DE SANCTIS, MARIA CRISTINA | en_US |
dc.contributor.author | CAPRIA, MARIA TERESA | en_US |
dc.contributor.author | Erard, S. | en_US |
dc.contributor.author | Bockelee-Morvan, D. | en_US |
dc.contributor.author | Leyrat, C. | en_US |
dc.contributor.author | Arnold, G. | en_US |
dc.contributor.author | Barucci, A. | en_US |
dc.contributor.author | Beck, P. | en_US |
dc.contributor.author | BELLUCCI, Giancarlo | en_US |
dc.contributor.author | Fornasier, S. | en_US |
dc.contributor.author | Longobardo, A. | en_US |
dc.contributor.author | Mottola, S. | en_US |
dc.contributor.author | PALOMBA, Ernesto | en_US |
dc.contributor.author | Quirico, E. | en_US |
dc.contributor.author | Schmitt, B. | en_US |
dc.date.accessioned | 2020-03-12T17:13:20Z | - |
dc.date.available | 2020-03-12T17:13:20Z | - |
dc.date.issued | 2015 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/23209 | - |
dc.description | We thank the following institutions and agencies for support of this work: Italian Space Agency (ASI, Italy), Centre National d’Études Spatiales (CNES, France), DLR (Germany), NASA (USA) Rosetta Program, and Science and Technology Facilities Council (UK). VIRTIS was built by a consortium, which includes Italy, France, and Germany, under the scientific responsibility of the Istituto di Astrofisica e Planetologia Spaziali of INAF, Italy, which also guides the scientific operations. The VIRTIS instrument development, led by the prime contractor Selex-ES (Florence, Italy), has been funded and managed by ASI, with contributions from Observatoire de Meudon financed by CNES, and from DLR. We thank the Rosetta Science Ground Segment and the Rosetta Mission Operations Centre for their support throughout the early phases of the mission. The VIRTIS calibrated data will be available through the ESA’s Planetary Science Archive Website ( www.rssd.esa.int/index.php?project=PSApage=index ) and is available upon request until posted to the archive. The VIRTIS Team wishes to dedicate this paper to the memory of Angioletta Coradini, conceiver of the instrument, our leader, and friend. | - |
dc.description.abstract | Aims: We investigate the nucleus photometric properties of the comet 67P/Churyumov-Gerasimenko as observed by the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS) onboard the Rosetta spacecraft. Both full-disk and disk-resolved images of the comet have been analyzed, deriving light and phase curves as well as a photometric reduction of the radiance factor (I/F) to single scattering albedo (SSA) in the 0.4-3.5 μm range. Methods: Hyperspectral cubes from VIRTIS were calibrated and corrected for instrumental artifacts. We computed integrated fluxes from full-disk acquisitions to derive nucleus light curves and phase curves at low phase angles (1.2°<α < 14.9°). Disk-resolved observations in the phase angle range 27.2°<α< 111.5° were reduced to SSA by means of a simplified Hapke model, deriving average spectrophotometric properties of the surface and producing SSA maps at different wavelengths. Spectral phase reddening in the visible (VIS) and infrared (IR) ranges was measured. Finally, full-disk and disk-resolved data were used together to derive a phase curve of the nucleus in the 1.2°<α < 111.5° range. <BR /> Results: We measure an asymmetric double-peaked light curve that is due to the elongated shape of the nucleus. The average SSA albedo shows a reddish spectrum with a strong absorption feature centered at 3.2 μm, while the surface exhibits a backscattering behavior. The derived geometric albedo is A<SUB>geo</SUB> = 0.062 ± 0.002 at 0.55 μm, indicating a very dark surface. Phase reddening is significant both in the VIS and IR ranges, and we report spectral slopes of 0.20/kÅ and 0.033/kÅ, respectively, after applying photometric reduction. SSA maps indicate that Hapi and Imothep regions are the brightest in the VIS, with the former showing a bluer spectrum with respect to the rest of the surface. The phase curve of the nucleus shows a strong opposition effect, with β = 0.077 ± 0.002 for α < 15°. | en_US |
dc.language.iso | eng | en_US |
dc.title | Photometric properties of comet 67P/Churyumov-Gerasimenko from VIRTIS-M onboard Rosetta | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201526307 | en_US |
dc.identifier.scopus | 2-s2.0-84946560676 | en_US |
dc.identifier.isi | 000365072200076 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/abs/2015/11/aa26307-15/aa26307-15.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 583 | en_US |
dc.relation.firstpage | A31 | en_US |
dc.relation.numberofpages | 14 | en_US |
dc.relation.article | A31 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 20 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | FRA | en_US |
dc.contributor.country | DEU | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2015A&A...583A..31C | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegherò il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.orcid | 0000-0002-7498-5207 | - |
crisitem.author.orcid | 0000-0003-1631-4314 | - |
crisitem.author.orcid | 0000-0001-9567-0055 | - |
crisitem.author.orcid | 0000-0003-4996-0099 | - |
crisitem.author.orcid | 0000-0003-4002-2434 | - |
crisitem.author.orcid | 0000-0002-3463-4437 | - |
crisitem.author.orcid | 0000-0002-9814-9588 | - |
crisitem.author.orcid | 0000-0003-0867-8679 | - |
crisitem.author.orcid | 0000-0002-1797-2741 | - |
crisitem.author.orcid | 0000-0002-9101-6774 | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Ciarniello_A&A2015_postprint.pdf | postprint | 4.26 MB | Adobe PDF | View/Open |
aa26307-15.pdf | 4.39 MB | Adobe PDF | View/Open |
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