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Exposed bright feat...
Exposed bright features on the comet 67P/Churyumov-Gerasimenko : distribution and evolution
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- Deshapriya, J. D. P. (författare)
- Univ Paris 06, Sorbonne Univ, Univ Paris Diderot,LESIA,CNRS, Sorbonne Paris Cite,PSL Res Univ,Observ Paris, 5 Pl Jules Janssen, F-92195 Meudon, France
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- Barucci, M. A. (författare)
- Univ Paris 06, Sorbonne Univ, Univ Paris Diderot,LESIA,CNRS, Sorbonne Paris Cite,PSL Res Univ,Observ Paris, 5 Pl Jules Janssen, F-92195 Meudon, France
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- Fornasier, S. (författare)
- Univ Paris 06, Sorbonne Univ, Univ Paris Diderot,LESIA,CNRS, Sorbonne Paris Cite,PSL Res Univ,Observ Paris, 5 Pl Jules Janssen, F-92195 Meudon, France
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- Hasselmann, P. H. (författare)
- Univ Paris 06, Sorbonne Univ, Univ Paris Diderot,LESIA,CNRS, Sorbonne Paris Cite,PSL Res Univ,Observ Paris, 5 Pl Jules Janssen, F-92195 Meudon, France
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- Feller, C. (författare)
- Univ Paris 06, Sorbonne Univ, Univ Paris Diderot,LESIA,CNRS, Sorbonne Paris Cite,PSL Res Univ,Observ Paris, 5 Pl Jules Janssen, F-92195 Meudon, France
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- Sierks, H. (författare)
- Max Planck Inst Sonnensystemforsch, Justus Von Liebig Weg 3, D-37077 Gottingen, Germany
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- Lucchetti, A. (författare)
- INAF OAPD, Astron Observ Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy
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- Pajola, M. (författare)
- NASA, Ames Res Ctr, Mountain View, CA 94035 USA
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- Oklay, N. (författare)
- DLR, Inst Planetenforsch, Rutherfordstr 2, D-12489 Berlin, Germany
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- Mottola, S. (författare)
- DLR, Inst Planetenforsch, Rutherfordstr 2, D-12489 Berlin, Germany
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- Masoumzadeh, N. (författare)
- Max Planck Inst Sonnensystemforsch, Justus Von Liebig Weg 3, D-37077 Gottingen, Germany
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- Tubiana, C. (författare)
- Max Planck Inst Sonnensystemforsch, Justus Von Liebig Weg 3, D-37077 Gottingen, Germany
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- Guettler, C. (författare)
- Max Planck Inst Sonnensystemforsch, Justus Von Liebig Weg 3, D-37077 Gottingen, Germany
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- Barbieri, C. (författare)
- Univ Padua, Dipartimento Fis & Astron Galileo Galilei, Vic Osservatorio 3, I-35122 Padua, Italy
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- Lamy, P. L. (författare)
- Aix Marseille Univ, Lab Astrophys Marseille UMR 7326, CNRS, F-13388 Marseille 13, France
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- Rodrigo, R. (författare)
- CSIC INTA, Ctr Astrobiol, Madrid 28850, Spain;Int Space Sci Inst, Hallerstr 6, CH-3012 Bern, Switzerland
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- Koschny, D. (författare)
- European Space Agcy, Res & Sci Support Dept, NL-2201 Noordwijk, Netherlands
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- Rickman, Hans (författare)
- Uppsala universitet,Observationell astrofysik,Polish Acad Sci, Space Res Ctr, Bartycka 18A, PL-00716 Warsaw, Poland
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Bertaux, J. -L (författare)
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- Bertini, I. (författare)
- Univ Padua, Dipartimento Fis & Astron Galileo Galilei, Vic Osservatorio 3, I-35122 Padua, Italy
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- Bodewits, D. (författare)
- Univ Maryland, Dept Astron, College Pk, MD 20742 USA
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- Boudreault, S. (författare)
- Max Planck Inst Sonnensystemforsch, Justus Von Liebig Weg 3, D-37077 Gottingen, Germany
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- Cremonese, G. (författare)
- INAF OAPD, Astron Observ Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy
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- Da Deppo, V. (författare)
- CNR IFN UOS Padova LUXOR, Via Trasea 7, I-35131 Padua, Italy
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- Davidsson, B. J. R. (författare)
- NASA, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA
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- Debei, S. (författare)
- Univ Padua, Dipartimento Ingn Meccan, Via Venezia 1, I-35131 Padua, Italy
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- De Cecco, M. (författare)
- Univ Trento, UNITN, Via Mesiano 77, I-38100 Trento, Italy
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- Deller, J. (författare)
- Max Planck Inst Sonnensystemforsch, Justus Von Liebig Weg 3, D-37077 Gottingen, Germany
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- Fulle, M. (författare)
- INAF, Osservatorio Astron Trieste, Via Tiepolo 11, I-34143 Trieste, Italy
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- Groussin, O. (författare)
- CSIC INTA, Ctr Astrobiol, Madrid 28850, Spain
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- Gutierrez, P. J. (författare)
- CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain
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- Hoang, H. V. (författare)
- Univ Paris 06, Sorbonne Univ, Univ Paris Diderot,LESIA,CNRS, Sorbonne Paris Cite,PSL Res Univ,Observ Paris, 5 Pl Jules Janssen, F-92195 Meudon, France
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- Hviid, S. F. (författare)
- DLR, Inst Planetenforsch, Rutherfordstr 2, D-12489 Berlin, Germany
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- Ip, W. (författare)
- Natl Cent Univ, Inst Space Sci, Chungli 32054, Taiwan
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- Jorda, L. (författare)
- CSIC INTA, Ctr Astrobiol, Madrid 28850, Spain
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- Keller, H. U. (författare)
- TU Braunschweig, Inst Geophys & Extraterr Phys, D-38106 Braunschweig, Germany
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- Knollenberg, J. (författare)
- DLR, Inst Planetenforsch, Rutherfordstr 2, D-12489 Berlin, Germany
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- Kramm, R. (författare)
- Max Planck Inst Sonnensystemforsch, Justus Von Liebig Weg 3, D-37077 Gottingen, Germany
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- Kuehrt, E. (författare)
- DLR, Inst Planetenforsch, Rutherfordstr 2, D-12489 Berlin, Germany
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- Kuppers, M. (författare)
- ESA ESAC, POB 78, Villanueva De La Canada 28691, Spain
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- Lara, L. (författare)
- CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain
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- Lazzarin, M. (författare)
- Univ Padua, Dipartimento Fis & Astron Galileo Galilei, Vic Osservatorio 3, I-35122 Padua, Italy
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- Lopez Moreno, J. J. (författare)
- CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain
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- Marzari, F. (författare)
- Univ Padua, Dipartimento Fis & Astron Galileo Galilei, Vic Osservatorio 3, I-35122 Padua, Italy
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- Naletto, G. (författare)
- CNR IFN UOS Padova LUXOR, Via Trasea 7, I-35131 Padua, Italy;Univ Padua, Ctr Ateneo & Attivita Spaziali Giuseppe Colombo C, Via Venezia 15, I-35131 Padua, Italy;Univ Padua, Dipartimento Ingn Informaz, Padua, Italy
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- Preusker, F. (författare)
- DLR, Inst Planetenforsch, Rutherfordstr 2, D-12489 Berlin, Germany
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- Shi, X. (författare)
- Max Planck Inst Sonnensystemforsch, Justus Von Liebig Weg 3, D-37077 Gottingen, Germany
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- Thomas, N. (författare)
- Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland
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Vincent, J. -B (författare)
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(creator_code:org_t)
- 2018-05-28
- 2018
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 613
- Relaterad länk:
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https://www.aanda.or...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Context. Since its arrival at the comet 67P/Churyumov-Gerasimenko in August 2014, the Rosetta spacecraft followed the comet as it went past the perihelion and beyond until September 2016. During this time there were many scientific instruments operating on board Rosetta to study the comet and its evolution in unprecedented detail. In this context, our study focusses on the distribution and evolution of exposed bright features that have been observed by OSIRIS, which is the scientific imaging instrument aboard Rosetta. Aims. We envisage investigating various morphologies of exposed bright features and the mechanisms that triggered their appearance. Methods. We co-registered multi-filter observations of OSIRIS images that are available in reflectance. The Lommel-Seeliger disk function was used to correct for the illumination conditions and the resulting colour cubes were used to perform spectrophotometric analyses on regions of interest. Results. We present a catalogue of 57 exposed bright features observed on the nucleus of the comet, all of which are attributed to the presence of H2O ice on the comet. Furthermore, we categorise these patches under four different morphologies and present geometric albedos for each category. Conclusions. Although the nucleus of 67P/Churyumov-Gerasimenko appears to be dark in general, there are localised H2O ice sources on the comet. Cometary activity escalates towards the perihelion passage and reveals such volatile ices. We propose that isolated H2O ice patches found in smooth terrains in regions, such as Imhotep, Bes, and Hapi, result from frost as an aftermath of the cessation of the diurnal water cycle on the comet as it recedes from perihelion. Upon the comet's return to perihelion, such patches are revealed when sublimation-driven erosion removes the thin dust layers that got deposited earlier. More powerful activity sources such as cometary outbursts are capable of revealing much fresher, less contaminated H2O ice that is preserved with consolidated cometary material, as observed on exposed patches resting on boulders. This is corroborated by our albedo calculations that attribute higher albedos for bright features with formations related to outbursts.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- comets: individual: 67P/Churyumov-Gerasimenko
- techniques: photometric
- methods: data analysis
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Till lärosätets databas
- Av författaren/redakt...
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Deshapriya, J. D ...
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Barucci, M. A.
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Fornasier, S.
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Hasselmann, P. H ...
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Feller, C.
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Sierks, H.
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visa fler...
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Lucchetti, A.
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Pajola, M.
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Oklay, N.
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Mottola, S.
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Masoumzadeh, N.
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Tubiana, C.
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Guettler, C.
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Barbieri, C.
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Lamy, P. L.
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Rodrigo, R.
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Koschny, D.
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Rickman, Hans
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Bertaux, J. -L
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Bertini, I.
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Bodewits, D.
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Boudreault, S.
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Cremonese, G.
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Da Deppo, V.
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Davidsson, B. J. ...
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Debei, S.
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De Cecco, M.
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Deller, J.
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Fulle, M.
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Groussin, O.
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Gutierrez, P. J.
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Hoang, H. V.
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Hviid, S. F.
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Ip, W.
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Jorda, L.
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Keller, H. U.
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Knollenberg, J.
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Kramm, R.
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Kuehrt, E.
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Kuppers, M.
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Lara, L.
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Lazzarin, M.
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Lopez Moreno, J. ...
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Marzari, F.
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Naletto, G.
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Preusker, F.
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Shi, X.
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Thomas, N.
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Vincent, J. -B
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