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The opposition effe...
The opposition effect of 67P/Churyumov-Gerasimenko on post-perihelion Rosetta images
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- Hasselmann, P. H. (author)
- Sorbonne Univ, UPMC Univ Paris 06, Univ Paris Diderot, PSL Res Univ,Sorbonne Paris Cite,Observ Paris,LES, 5 Pl J Janssen, F-92195 Meudon, France
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- Barucci, M. A. (author)
- Sorbonne Univ, UPMC Univ Paris 06, Univ Paris Diderot, PSL Res Univ,Sorbonne Paris Cite,Observ Paris,LES, 5 Pl J Janssen, F-92195 Meudon, France
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- Fornasier, S. (author)
- Sorbonne Univ, UPMC Univ Paris 06, Univ Paris Diderot, PSL Res Univ,Sorbonne Paris Cite,Observ Paris,LES, 5 Pl J Janssen, F-92195 Meudon, France
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- Feller, C. (author)
- Sorbonne Univ, UPMC Univ Paris 06, Univ Paris Diderot, PSL Res Univ,Sorbonne Paris Cite,Observ Paris,LES, 5 Pl J Janssen, F-92195 Meudon, France
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- Deshapriya, J. D. P. (author)
- Sorbonne Univ, UPMC Univ Paris 06, Univ Paris Diderot, PSL Res Univ,Sorbonne Paris Cite,Observ Paris,LES, 5 Pl J Janssen, F-92195 Meudon, France
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- Fulchignoni, M. (author)
- Sorbonne Univ, UPMC Univ Paris 06, Univ Paris Diderot, PSL Res Univ,Sorbonne Paris Cite,Observ Paris,LES, 5 Pl J Janssen, F-92195 Meudon, France
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- Jost, B. (author)
- Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland
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- Sierks, H. (author)
- Max Planck Inst Sonnensyst Forschung, Justus von Liebig Weg 3, D-37077 Gottingen, Germany
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- Barbieri, C. (author)
- Univ Padua, Dept Phys & Astron, Vicolo Osservatorio 3, I-35122 Padua, Italy
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- Lamy, P. L. (author)
- CNRS, Lab Astrophys Marseille, UMR 7326, 38 Rue Frederic Joliot Curie, F-13388 Marseille 13, France;Univ Aix Marseille, 38 Rue Frederic Joliot Curie, F-13388 Marseille 13, France
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- Rodrigo, R. (author)
- CSIC, INTA, Ctr Astrobiol, Madrid 28850, Spain;Int Space Sci Inst, Hallerstr 6, CH-3012 Bern, Switzerland
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- Koschny, D. (author)
- ESA, European Space Res & Technol Ctr, Sci Support Off, Keplerlaan, Netherlands
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- Rickman, Hans (author)
- Uppsala universitet,Teoretisk astrofysik,PAS Space Res Ctr, Bartycka 18A, PL-00716 Warsaw, Poland
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- A'Hearn, M. (author)
- Univ Maryland, Dept Astron, College Pk, MD 20742 USA
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Bertaux, J. -L (author)
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- Bertini, I. (author)
- Univ Padua, Dept Phys & Astron, Vicolo Osservatorio 3, I-35122 Padua, Italy
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- Cremonese, G. (author)
- INAF, Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy
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- Da Deppo, V. (author)
- CNR, IFN UOS Padova LUXOR, Via Trasea 7, I-35131 Padua, Italy
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- Davidsson, B. (author)
- Jet Prop Lab, M-S 183-301,4800 Oak Grove Dr, Pasadena, CA 91109 USA
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- Debei, S. (author)
- Univ Padua, Dept Mech Engn, Via Venezia 1, I-35131 Padua, Italy
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- De Cecco, M. (author)
- Univ Trento, Via Mesiano 77, I-38100 Trento, Italy
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- Deller, J. (author)
- Max Planck Inst Sonnensyst Forschung, Justus von Liebig Weg 3, D-37077 Gottingen, Germany
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- Fulle, M. (author)
- INAF, Osservatorio Astron, Via Tiepolo 11, I-34014 Trieste, Italy
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- Gaskell, R. W. (author)
- Planetary Sci Inst, 1700 East Ft Lowell,Suite 106, Tucson, AZ 85719 USA
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- Groussin, O. (author)
- Aix Marseille Univ, CNRS, LAM, UMR, Marseille, France
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- Gutierrez, P. J. (author)
- CSIC, Inst Astrofis Andalucia, C Glorieta Astron S-N, E-18008 Granada, Spain
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- Guettler, C. (author)
- Max Planck Inst Sonnensyst Forschung, Justus von Liebig Weg 3, D-37077 Gottingen, Germany
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- Hofmann, M. (author)
- Max Planck Inst Sonnensyst Forschung, Justus von Liebig Weg 3, D-37077 Gottingen, Germany
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- Hviid, S. F. (author)
- Deutsches Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch Asteroiden & Kometen, Rutherfordstrafle 2, D-12489 Berlin, Germany
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Ip, W. -H (author)
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- Jorda, L. (author)
- Aix Marseille Univ, CNRS, LAM, UMR, Marseille, France
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- Keller, H. U. (author)
- Deutsches Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch Asteroiden & Kometen, Rutherfordstrafle 2, D-12489 Berlin, Germany;Tech Univ Carolo Wilhelmina Braunschweig, IGEP, Mendelssohnstr 3, D-38106 Braunschweig, Germany
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- Knollenberg, J. (author)
- Deutsches Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch Asteroiden & Kometen, Rutherfordstrafle 2, D-12489 Berlin, Germany
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- Kovacs, G. (author)
- Max Planck Inst Sonnensyst Forschung, Justus von Liebig Weg 3, D-37077 Gottingen, Germany;Budapest Univ Technol & Econ, Budapest, Hungary
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- Kramm, R. (author)
- Max Planck Inst Sonnensyst Forschung, Justus von Liebig Weg 3, D-37077 Gottingen, Germany
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- Kuehrt, E. (author)
- Deutsches Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch Asteroiden & Kometen, Rutherfordstrafle 2, D-12489 Berlin, Germany
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- Kuppers, M. (author)
- ESA, European Space Astron Ctr, Operat Dept, POB 78, Madrid 28691, Spain
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- Lara, M. L. (author)
- CSIC, Inst Astrofis Andalucia, C Glorieta Astron S-N, E-18008 Granada, Spain
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- Lazzarin, M. (author)
- Univ Padua, Dept Phys & Astron, Vicolo Osservatorio 3, I-35122 Padua, Italy
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- Lopez-Moreno, J. J. (author)
- CSIC, Inst Astrofis Andalucia, C Glorieta Astron S-N, E-18008 Granada, Spain
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- Marzari, F. (author)
- Univ Padua, Dept Phys & Astron, Vicolo Osservatorio 3, I-35122 Padua, Italy
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- Mottola, S. (author)
- Deutsches Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch Asteroiden & Kometen, Rutherfordstrafle 2, D-12489 Berlin, Germany
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- Naletto, G. (author)
- Jet Prop Lab, M-S 183-301,4800 Oak Grove Dr, Pasadena, CA 91109 USA;Univ Padua, Ctr Studies & Act Space CISAS G Colombo, Via Venezia 15, I-35131 Padua, Italy
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- Oklay, N. (author)
- Deutsches Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch Asteroiden & Kometen, Rutherfordstrafle 2, D-12489 Berlin, Germany
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- Pommerol, A. (author)
- Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland
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- Thomas, N. (author)
- Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland
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- Tubiana, C. (author)
- Max Planck Inst Sonnensyst Forschung, Justus von Liebig Weg 3, D-37077 Gottingen, Germany
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Vincent, J. -B (author)
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(creator_code:org_t)
- 2017-09-04
- 2017
- English.
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In: Monthly notices of the Royal Astronomical Society. - : OXFORD UNIV PRESS. - 0035-8711 .- 1365-2966. ; 469, s. S550-S567
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Abstract
Subject headings
Close
- High-resolution OSIRIS/Rosetta images of 67P/Churyumov-Gerasimenko acquired on the night run of 2016 April 9-10 show, at large scale, an opposition effect (OE) spot sweeping across Imhotep as the phase angle ranges from 0 degrees to 17 degrees. In this work, we fitted the phase curve of the whole surface imaged as well as three particular features using both the linear-exponential and Hapke models. These features encompass different types of spectral behaviour: a circular mesa, one venous structure and an assemblage of bright spots, going from red to blue colours. Both the Hapke and linear-exponential parameters indicate a stepwise sharpening of the OE from bright spots to circular mesa. Yet a very broad nonlinear phase curve is verified and no sign of sharp OE associated with a coherent-backscattering mechanism is observed. We estimate that the 67P surface is dominated by opaque, desiccated and larger-than-wavelength irregular grains. Veins and bright spots display photometric properties consistent with surfaces becoming slightly brighter as they are enriched by high-albedo ice grains. We also report the estimation of normal albedo for all cometary regions observed throughout the image sequence. Comparison to pre-perihelion results indicates that far better insolation of northern brighter regions, i.e. Hapi, Hathor and Seth, is sufficient to explain mismatches on the photometric parameters. However, metre-scale photometric analysis of the Imhotep-Ash boundary area advocates for mild darkening (<7 per cent) of the surface at local scale.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Rosetta: 67P/Churyumov-Gerasimenko
- photometry
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Hasselmann, P. H ...
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Barucci, M. A.
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Fornasier, S.
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Feller, C.
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Deshapriya, J. D ...
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Fulchignoni, M.
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show more...
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Jost, B.
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Sierks, H.
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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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A'Hearn, M.
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Bertaux, J. -L
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Bertini, I.
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Cremonese, G.
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Da Deppo, V.
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Davidsson, B.
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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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Gaskell, R. W.
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Groussin, O.
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Gutierrez, P. J.
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Guettler, C.
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Hofmann, M.
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Hviid, S. F.
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Ip, W. -H
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Jorda, L.
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Keller, H. U.
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Knollenberg, J.
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Kovacs, G.
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Kramm, R.
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Kuehrt, E.
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Kuppers, M.
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Lara, M. L.
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Lazzarin, M.
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Lopez-Moreno, J. ...
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Marzari, F.
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Mottola, S.
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Naletto, G.
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Oklay, N.
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Pommerol, A.
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Thomas, N.
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Tubiana, C.
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Vincent, J. -B
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Uppsala University