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Spectrophotometric ...
Spectrophotometric properties of the nucleus of comet 67P/Churyumov-Gerasimenko from the OSIRIS instrument onboard the ROSETTA spacecraft
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- Fornasier, S. (author)
- Univ Paris Diderot, Univ Paris 06, CNRS, LESIA,Observ Paris, F-92195 Meudon Pricipal, France.;Unix Paris Diderot, Sorbonne Paris Cite, F-75205 Paris 13, France.
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- Hasselmann, P. H. (author)
- Univ Paris Diderot, Univ Paris 06, CNRS, LESIA,Observ Paris, F-92195 Meudon Pricipal, France.;Observ Nacl, Rio De Janeiro, Brazil.
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- Barucci, M. A. (author)
- Univ Paris Diderot, Univ Paris 06, CNRS, LESIA,Observ Paris, F-92195 Meudon Pricipal, France.
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show more...
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- Feller, C. (author)
- Univ Paris Diderot, Univ Paris 06, CNRS, LESIA,Observ Paris, F-92195 Meudon Pricipal, France.;Unix Paris Diderot, Sorbonne Paris Cite, F-75205 Paris 13, France.
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- Besse, S. (author)
- European Space Agcy, Res & Sci Support Dept, NL-2201 Noordwijk, Netherlands.
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- Leyrat, C. (author)
- Univ Paris Diderot, Univ Paris 06, CNRS, LESIA,Observ Paris, F-92195 Meudon Pricipal, France.
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- Lara, L. (author)
- CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain.
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- Gutierrez, P. J. (author)
- CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain.
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- Oklay, N. (author)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Tubiana, C. (author)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Scholten, F. (author)
- DLR, Inst Planetary Res, D-12489 Berlin, Germany.
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- Sierks, H. (author)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Barbieri, C. (author)
- Univ Padua, Dept Phys & Astron G Galilei, I-35122 Padua, Italy.
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- Lamy, P. L. (author)
- CNRS, UMR 7326, Lab Astrophys Marseille, F-13388 Marseille 13, France.;Aix Marseille Univ, F-13388 Marseille 13, France.
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- Rodrigo, R. (author)
- CSIC INTA, Ctr Astrobiol, Madrid 28850, Spain.;Int Space Sci Inst, CH-3012 Bern, Switzerland.
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- Koschny, D. (author)
- European Space Agcy, Res & Sci Support Dept, NL-2201 Noordwijk, Netherlands.
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- Rickman, Hans (author)
- Uppsala universitet,Institutionen för fysik och astronomi,PAS Space Reserch Ctr, PL-00716 Warsaw, Poland.
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- Keller, H. U. (author)
- Tech Univ Carolo Wilhelmina Braunschweig, Inst Geophys & Extraterr Phys, D-38106 Braunschweig, Germany.
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- Agarwal, J. (author)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- A'Hearn, M. F. (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 G Galilei, I-35122 Padua, Italy.
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- Cremonese, G. (author)
- Osserv Astron Padova, INAF, I-35122 Padua, Italy.
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- Da Deppo, V. (author)
- CNR IFN UOS Padova LUXOR, I-35131 Padua, Italy.
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- Davidsson, Björn (author)
- Uppsala universitet,Institutionen för fysik och astronomi
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- Debei, S. (author)
- Univ Padua, Dept Mech Engn, I-35131 Padua, Italy.
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- De Cecco, M. (author)
- Univ Trent, UNITN, I-38100 Trento, Italy.
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- Fulle, M. (author)
- Osserv Astron Trieste, INAF, I-34143 Trieste, Italy.
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- Groussin, O. (author)
- CNRS, UMR 7326, Lab Astrophys Marseille, F-13388 Marseille 13, France.;Aix Marseille Univ, F-13388 Marseille 13, France.
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- Guettler, C. (author)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Hviid, S. F. (author)
- DLR, Inst Planetary Res, D-12489 Berlin, Germany.
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- Ip, W. (author)
- Natl Cent Univ, Inst Space Sci, Chungli 32054, Taiwan.
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- Jorda, L. (author)
- CNRS, UMR 7326, Lab Astrophys Marseille, F-13388 Marseille 13, France.;Aix Marseille Univ, F-13388 Marseille 13, France.
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- Knollenberg, J. (author)
- DLR, Inst Planetary Res, D-12489 Berlin, Germany.
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- Kovacs, G. (author)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Kramm, R. (author)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Kuehrt, E. (author)
- DLR, Inst Planetary Res, D-12489 Berlin, Germany.
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- Kueppers, M. (author)
- ESA ESAC, Villanueva De La Canada 28691, Spain.
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- La Forgia, F. (author)
- Univ Padua, Dept Phys & Astron G Galilei, I-35122 Padua, Italy.
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- Lazzarin, M. (author)
- Univ Padua, Dept Phys & Astron G Galilei, I-35122 Padua, Italy.
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- Lopez Moreno, J. J. (author)
- CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain.
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- Marzari, F. (author)
- Univ Padua, Dept Phys & Astron G Galilei, I-35122 Padua, Italy.
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Matz, K. -D (author)
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- Michalik, H. (author)
- Inst Datentech & Kommunikat Netze, D-38106 Braunschweig, Germany.
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- Moreno, F. (author)
- CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain.
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- Mottola, S. (author)
- DLR, Inst Planetary Res, D-12489 Berlin, Germany.
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- Naetto, G. (author)
- CNR IFN UOS Padova LUXOR, I-35131 Padua, Italy.;Univ Padua, Dept Informat Engn, I-35131 Padua, Italy.;Univ Padua, Ctr Studies & Act Space CISAS G Colombo, I-35131 Padua, Italy.
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- Pajola, M. (author)
- Univ Padua, Ctr Studies & Act Space CISAS G Colombo, I-35131 Padua, Italy.
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- Pommerol, A. (author)
- Univ Bern, Inst Phys, CH-3012 Bern, Switzerland.
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- Preusker, F. (author)
- DLR, Inst Planetary Res, D-12489 Berlin, Germany.
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- Shi, X. (author)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Snodgrass, C. (author)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.;Open Univ, Dept Phys Sci, Planetary & Space Sci, Milton Keynes MK7 6AA, Bucks, England.
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- Thomas, N. (author)
- Univ Bern, Inst Phys, CH-3012 Bern, Switzerland.
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Vincent, J-B (author)
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Univ Paris Diderot, Univ Paris 06, CNRS, LESIA,Observ Paris, F-92195 Meudon Pricipal, France;Unix Paris Diderot, Sorbonne Paris Cite, F-75205 Paris 13, France. Univ Paris Diderot, Univ Paris 06, CNRS, LESIA,Observ Paris, F-92195 Meudon Pricipal, France.;Observ Nacl, Rio De Janeiro, Brazil. (creator_code:org_t)
- 2015-10-30
- 2015
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 583
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https://doi.org/10.1...
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Abstract
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- Context. The Rosetta mission of the European Space Agency has been orbiting the comet 67P/Churyumov-Gerasimenko (67P) since August 2014 and is now in its escort phase. A large complement of scientific experiments designed to complete the most detailed study of a comet ever attempted are onboard Rosetta. Aims. We present results for the photometric and spectrophotometric properties of the nucleus of 67P derived from the OSIRIS imaging system, which consists of a Wide Angle Camera (WAC) and a Narrow Angle Camera (NAC). The observations presented here were performed during July and the beginning of August 2014, during the approach phase, when OSIRIS was mapping the surface of the comet with several filters at different phase angles (1.3 degrees-54 degrees). The resolution reached up to 2.1 m/px. Methods. The OSIRIS images were processed with the OSIRIS standard pipeline, then converted into I/F. radiance factors and corrected for the illumination conditions at each pixel using the Lommel-Seeliger disk law. Color cubes of the surface were produced by stacking registered and illumination-corrected images. Furthermore, photometric analysis was performed both on disk-averaged photometry in several filters and on disk-resolved images acquired with the NAC orange filter, centered at 649 ran, using Hapke modeling. Results. The disk-averaged phase function of the nucleus of 67P shows a strong opposition surge with a G parameter value of -0.13 +/- 0.01 in the HG system formalism and an absolute magnitude H-v(1, 1, 0) = 15.74 +/- 0.02 mag. The integrated spectrophotometry in 20 filters covering the 250-1000 nm wavelength range shows a red spectral behavior, without clear absorption bands except for a potential absorption centered at similar to 290 rim that is possibly due to SO2 ice. The nucleus shows strong phase reddening, with disk-averaged spectral slopes increasing from 11%/( 100 nm) to 16%/(100 nm) in the 1.3 degrees-54 degrees phase angle range. The geometric albedo of the comet is 6.5 +/- 0.2% at 649 nm, with local variations of up to similar to 16% in the Hapi region. From the disk-resolved images we computed the spectral slope together with local spectrophotometry and identified three distinct groups of regions (blue, moderately red, and red). The Hapi region is the brightest, the bluest in term of spectral slope, and the most active surface on the comet. Local spectrophotometry shows an enhancement of the flux in the 700-750 nm that is associated with coma emissions.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- comets: individual: 67P/Churyumov-Gerasimenko
- techniques: photometric
- methods: data analysis
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Fornasier, S.
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Hasselmann, P. H ...
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Barucci, M. A.
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Feller, C.
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Besse, S.
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Leyrat, C.
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show more...
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Lara, L.
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Gutierrez, P. J.
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Oklay, N.
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Tubiana, C.
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Scholten, F.
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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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Keller, H. U.
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Agarwal, J.
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A'Hearn, M. F.
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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, Björn
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Debei, S.
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De Cecco, M.
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Fulle, M.
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Groussin, O.
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Guettler, C.
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Hviid, S. F.
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Ip, W.
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Jorda, L.
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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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Kueppers, M.
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La Forgia, F.
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Lazzarin, M.
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Lopez Moreno, J. ...
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Marzari, F.
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Matz, K. -D
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Michalik, H.
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Moreno, F.
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Mottola, S.
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Naetto, G.
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Pajola, M.
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Pommerol, A.
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Preusker, F.
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Shi, X.
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Snodgrass, C.
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Thomas, N.
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Vincent, J-B
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Astronomy Astrop ...
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Uppsala University