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Size-frequency dist...
Size-frequency distribution of boulders >= 7 m on comet 67P/Churyumov-Gerasimenko
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- Pajola, Maurizio (författare)
- Univ Padua, CISAS, Ctr Studies & Act Space, I-35131 Padua, Italy.
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- Vincent, Jean-Baptiste (författare)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Guettler, Carsten (författare)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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visa fler...
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- Lee, Jui-Chi (författare)
- Natl Cent Univ, Inst Space Sci, Chungli 32054, Taiwan.
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- Bertini, Ivano (författare)
- Univ Padua, CISAS, Ctr Studies & Act Space, I-35131 Padua, Italy.
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- Massironi, Matteo (författare)
- Univ Padua, CISAS, Ctr Studies & Act Space, I-35131 Padua, Italy.
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- Simioni, Emanuele (författare)
- CNR IFN UOS Padova LUXOR, I-35131 Padua, Italy.
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- Marzari, Francesco (författare)
- Univ Padua, Dept Phys & Astron G Galilei, I-35122 Padua, Italy.
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- Giacomini, Lorenza (författare)
- Univ Padua, Dept Geosci, I-35131 Padua, Italy.
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- Lucchetti, Alice (författare)
- Univ Padua, CISAS, Ctr Studies & Act Space, I-35131 Padua, Italy.
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- Barbieri, Cesare (författare)
- Univ Padua, CISAS, Ctr Studies & Act Space, I-35131 Padua, Italy.;Univ Padua, Dept Phys & Astron G Galilei, I-35122 Padua, Italy.
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- Cremonese, Gabriele (författare)
- NAF Osservatorio Astron Padova, I-35122 Padua, Italy.
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- Naletto, Giampiero (författare)
- Univ Padua, Dept Informat Engn, I-35131 Padua, Italy.
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- Pommerol, Antoine (författare)
- Univ Bern, Inst Phys, CH-3012 Bern, Switzerland.
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- El-Maarry, Mohamed R. (författare)
- Univ Bern, Inst Phys, CH-3012 Bern, Switzerland.
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- Besse, Sebastien (författare)
- European Space Res & Technol Ctr ESA, Sci Support Off, NL-2201 AZ Noordwijk, Netherlands.
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- Kueppers, Michael (författare)
- European Space Astron Ctr ESA, Operat Dept, Madrid 28691, Spain.
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- La Forgia, Fiorangela (författare)
- Univ Padua, Dept Phys & Astron G Galilei, I-35122 Padua, Italy.
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- Lazzarin, Monica (författare)
- Univ Padua, Dept Phys & Astron G Galilei, I-35122 Padua, Italy.
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- Thomas, Nicholas (författare)
- Univ Bern, Inst Phys, CH-3012 Bern, Switzerland.
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- Auger, Anne-Therese (författare)
- Aix Marseille Univ, CNRS, UMR 7326, LAM, F-13388 Marseille, France.
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- Sierks, Holger (författare)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Lamy, Philippe (författare)
- Aix Marseille Univ, CNRS, UMR 7326, LAM, F-13388 Marseille, France.
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- Rodrigo, Rafael (författare)
- CSIC INTA, Ctr Astrobiol, Madrid 28850, Spain.;Int Space Sci Inst, CH-3012 Bern, Switzerland.
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- Koschny, Detlef (författare)
- European Space Astron Ctr ESA, Operat Dept, Madrid 28691, Spain.
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- Rickman, Hans (författare)
- Uppsala universitet,Institutionen för fysik och astronomi,PAS Space Res Ctr, PL-00716 Warsaw, Poland.
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- Keller, Horst U. (författare)
- Tech Univ Carolo Wilhelmina Braunschweig, Inst Geophys & Extraterr Phys, D-38106 Braunschweig, Germany.
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- Agarwal, Jessica (författare)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- A'Hearn, Michael F. (författare)
- Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
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- Barucci, Maria A. (författare)
- Univ Paris Diderot, Univ Paris 06, CNRS, LESIA,Observ Paris, F-92195 Meudon, France.;Univ Paris Diderot, Sorbonne Paris Cite, F-75205 Paris 13, France.
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- Bertaux, Jean-Loup (författare)
- CNRS UVSQ IPSL, LATMOS, F-78280 Guyancourt, France.
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- Da Deppo, Vania (författare)
- CNR IFN UOS Padova LUXOR, I-35131 Padua, Italy.
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Davidsson, Björn (författare)
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- De Cecco, Mariolino (författare)
- Univ Trent, UNITN, I-38100 Trento, Italy.
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- Debei, Stefano (författare)
- Univ Padua, Dept Mech Engn, I-35131 Padua, Italy.
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- Ferri, Francesca (författare)
- Univ Padua, CISAS, Ctr Studies & Act Space, I-35131 Padua, Italy.
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- Fornasier, Sonia (författare)
- Univ Paris Diderot, Univ Paris 06, CNRS, LESIA,Observ Paris, F-92195 Meudon, France.;Univ Paris Diderot, Sorbonne Paris Cite, F-75205 Paris 13, France.
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- Fulle, Marco (författare)
- INAF Osservatorio Astron Trieste, I-34143 Trieste, Italy.
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- Groussin, Olivier (författare)
- Aix Marseille Univ, CNRS, UMR 7326, LAM, F-13388 Marseille, France.
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- Gutierrez, Pedro J. (författare)
- Inst Astrofis Andalucia CSIC, Granada 18008, Spain.
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- Hviid, Stubbe F. (författare)
- Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch, D-12489 Berlin, Germany.
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- Ip, Wing-Huen (författare)
- Natl Cent Univ, Inst Space Sci, Chungli 32054, Taiwan.
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- Jorda, Laurent (författare)
- Aix Marseille Univ, CNRS, UMR 7326, LAM, F-13388 Marseille, France.
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- Knollenberg, Joerg (författare)
- Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch, D-12489 Berlin, Germany.
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- Kramm, J. -Rainer (författare)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Kuert, Ekkehard (författare)
- Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch, D-12489 Berlin, Germany.
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- Lara, Luisa M. (författare)
- Inst Astrofis Andalucia CSIC, Granada 18008, Spain.
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- Lin, Zhong-Yi (författare)
- Natl Cent Univ, Inst Space Sci, Chungli 32054, Taiwan.
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- Lopez Moreno, Jose J. (författare)
- Inst Astrofis Andalucia CSIC, Granada 18008, Spain.
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- Magrin, Sara (författare)
- Univ Padua, Dept Phys & Astron G Galilei, I-35122 Padua, Italy.
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- Marchi, Simone (författare)
- Southwest Res Inst, Virtual Inst, Solar Syst Explorat Res, Boulder, CO 80302 USA.
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- Michalik, Harald (författare)
- Tech Univ Carolo Wilhelmina Braunschweig, Inst Datentech & Kommunikat Netze, D-38106 Braunschweig, Germany.
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- Moissl, Richard (författare)
- European Space Res & Technol Ctr ESA, Sci Support Off, NL-2201 AZ Noordwijk, Netherlands.
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- Mottola, Stefano (författare)
- Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch, D-12489 Berlin, Germany.
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- Oklay, Nilda (författare)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Preusker, Frank (författare)
- Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch, D-12489 Berlin, Germany.
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- Scholten, Frank (författare)
- Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch, D-12489 Berlin, Germany.
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- Tubiana, Cecilia (författare)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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Univ Padua, CISAS, Ctr Studies & Act Space, I-35131 Padua, Italy Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany. (creator_code:org_t)
- 2015-10-30
- 2015
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 583
- 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
- Aims. We derive for the first time the size-frequency distribution of boulders on a comet, 67P/Churyumov-Gerasimenko (67P), computed from the images taken by the Rosetta/OSIRIS imaging system. We highlight the possible physical processes that lead to these boulder size distributions. Methods. We used images acquired by the OSIRIS Narrow Angle Camera, NAC. on 5 and 6 August 2014. The scale of these images (2.44-2.03 m/px) is such that boulders >= 7 m can be identified and manually extracted from the datasets with the software ArcGIS. We derived both global and localized size-frequency distributions. The three-pixel sampling detection, coupled with the favorable shadowine of the surface (observation phase angle ranging from 48 to 53), enables unequivocally detecting boulders scattered all over the illuminated side of 67P. Results. We identify 3546 boulders larger than 7 m on the imaged surface (36.4 km(2)), with a global number density of nearly 100/km(2) and a cumulative size-frequency distribution represented by a power-law with index of -3.6 +0.2/-0.3. The two lobes of 67P appear to have slightly different distributions, with an index of -3.5 +0.2/-0.3 for the main lobe (body) and -4.0 +0.31-0.2 for the small lobe (head). The steeper distribution of the small lobe might be due to a more pervasive fracturing. The difference of the distribution for the connecting region (neck) is much more significant, with an index value of -2.2 +0.2/-0.2. We propose that the boulder field located in the neck area is the result of blocks falling from the contiguous Hathor cliff. The lower slope of the size-frequency distribution we see today in the neck area might be due to the concurrent processes acting on the smallest boulders, such as i) disintegration or fragmentation and vanishing through sublimation; ii) uplifting by gas drag and consequent redistribution; and iii) burial beneath a debris blanket. We also derived the cumulative size-frequency distribution per km(2) of localized areas on 67P. By comparing the cumulative size-frequency distributions of similar geomorphological settings, we derived similar power-law index values. This suggests that despite the selected locations on different and often opposite sides of the comet, similar sublimation or activity processes, pit formation or collapses, as well as thermal stresses or fracturing events occurred on multiple areas of the comet, shaping its surface into the appearance we see today.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- comets: general
- comets: individual: 67P/Churyumov-Gerasimenko
- methods: data analysis
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Pajola, Maurizio
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Vincent, Jean-Ba ...
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Guettler, Carste ...
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Lee, Jui-Chi
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Bertini, Ivano
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Massironi, Matte ...
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visa fler...
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Simioni, Emanuel ...
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Marzari, Frances ...
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Giacomini, Loren ...
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Lucchetti, Alice
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Barbieri, Cesare
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Cremonese, Gabri ...
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Naletto, Giampie ...
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Pommerol, Antoin ...
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El-Maarry, Moham ...
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Besse, Sebastien
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Kueppers, Michae ...
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La Forgia, Fiora ...
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Lazzarin, Monica
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Thomas, Nicholas
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Auger, Anne-Ther ...
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Sierks, Holger
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Lamy, Philippe
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Rodrigo, Rafael
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Koschny, Detlef
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Rickman, Hans
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Keller, Horst U.
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Agarwal, Jessica
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A'Hearn, Michael ...
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Barucci, Maria A ...
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Bertaux, Jean-Lo ...
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Da Deppo, Vania
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Davidsson, Björn
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De Cecco, Mariol ...
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Debei, Stefano
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Ferri, Francesca
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Fornasier, Sonia
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Fulle, Marco
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Groussin, Olivie ...
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Gutierrez, Pedro ...
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Hviid, Stubbe F.
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Ip, Wing-Huen
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Jorda, Laurent
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Knollenberg, Joe ...
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Kramm, J. -Raine ...
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Kuert, Ekkehard
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Lara, Luisa M.
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Lin, Zhong-Yi
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Lopez Moreno, Jo ...
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Magrin, Sara
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Marchi, Simone
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Michalik, Harald
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Moissl, Richard
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Mottola, Stefano
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Oklay, Nilda
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Preusker, Frank
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Scholten, Frank
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Tubiana, Cecilia
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