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Large-scale dust je...
Large-scale dust jets in the coma of 67P/Churyumov-Gerasimenko as seen by the OSIRIS instrument onboard Rosetta
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- Lara, L. M. (författare)
- Inst Astrofis Andalucia CSIC, Glorieta Astron, Granada 18008, Spain.
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- Lowry, S. (författare)
- Univ Kent, Ctr Astrophys & Planetary Sci, Sch Phys Sci, Canterbury CT2 7NH, Kent, England.
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Vincent, J. -B (författare)
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visa fler...
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- Gutierrez, P. J. (författare)
- Inst Astrofis Andalucia CSIC, Glorieta Astron, Granada 18008, Spain.
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- Rozek, A. (författare)
- Univ Kent, Ctr Astrophys & Planetary Sci, Sch Phys Sci, Canterbury CT2 7NH, Kent, England.
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- La Forgia, F. (författare)
- Univ Padua, Dept Phys & Astron G Galilei, I-35122 Padua, Italy.
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- Oklay, N. (författare)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Sierks, H. (författare)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Barbieri, C. (författare)
- Univ Padua, Dept Phys & Astron G Galilei, I-35122 Padua, Italy.;Univ Padua, Ctr Studies & Act Space CISAS G Colombo, I-35131 Padua, Italy.
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- Lamy, P. L. (författare)
- Aix Marseille Univ, CNRS, UMR 7326, Lab Astrophys Marseille, F-13388 Marseille, France.
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- Rodrigo, R. (författare)
- European Space Astron Ctr, European Space Agcy, Ctr Astrobiol INTA CSIC, Madrid 28691, Spain.;Int Space Sci Inst, 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,Institutionen för fysik och astronomi,PAS Space Reserch Ctr, PL-00716 Warsaw, Poland.
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- Keller, H. U. (författare)
- Tech Univ Carolo Wilhelmina Braunschweig, Inst Geophys & Extraterr Phys, D-38106 Braunschweig, Germany.
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- Agarwal, J. (författare)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Auger, A. -T (författare)
- Aix Marseille Univ, CNRS, UMR 7326, Lab Astrophys Marseille, F-13388 Marseille, France.
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- A'Hearn, M. F. (författare)
- Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
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- Barucci, M. A. (författare)
- Univ Paris Diderot, Univ Paris 06, Observ Paris, LESIA,CNRS, F-92195 Meudon, France.
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Bertaux, J. -L (författare)
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- Bertini, I. (författare)
- Univ Padua, Ctr Studies & Act Space CISAS G Colombo, I-35131 Padua, Italy.
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- Besse, S. (författare)
- European Space Agcy, Res & Sci Support Dept, NL-2201 Noordwijk, Netherlands.
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- Bodewits, D. (författare)
- Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
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- Cremonese, G. (författare)
- INAF Osservatorio Astron Padova, I-35122 Padua, Italy.
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- Davidsson, Björn (författare)
- Uppsala universitet,Institutionen för fysik och astronomi
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- Da Deppo, V. (författare)
- CNR IFN UOS Padova LUXOR, I-35131 Padua, Italy.
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- Debei, S. (författare)
- Univ Padua, Dept Ind Engn, I-35131 Padua, Italy.
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- De Cecco, M. (författare)
- Univ Trento, I-38123 Trento, Italy.
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- El-Maarry, M. R. (författare)
- Univ Bern, Inst Phys, CH-3012 Bern, Switzerland.
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- Ferri, F. (författare)
- Univ Padua, Ctr Studies & Act Space CISAS G Colombo, I-35131 Padua, Italy.
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- Fornasier, S. (författare)
- Univ Paris Diderot, Univ Paris 06, Observ Paris, LESIA,CNRS, F-92195 Meudon, France.
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- Fulle, M. (författare)
- INAF Osservatorio Astron Trieste, I-34143 Trieste, Italy.
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- Groussin, O. (författare)
- Aix Marseille Univ, CNRS, UMR 7326, Lab Astrophys Marseille, F-13388 Marseille, France.
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- Gutierrez-Marques, P. (författare)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Guettler, C. (författare)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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- Hviid, S. F. (författare)
- Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch, D-12489 Berlin, Germany.
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Ip, W. -H (författare)
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- Jorda, L. (författare)
- Aix Marseille Univ, CNRS, UMR 7326, Lab Astrophys Marseille, F-13388 Marseille, France.
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- Knollenberg, J. (författare)
- Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch, D-12489 Berlin, Germany.
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- Kovacs, G. (författare)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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Kramm, J. -R (författare)
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- Kuehrt, E. (författare)
- Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch, D-12489 Berlin, Germany.
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- Kueppers, M. (författare)
- ESA ESAC, Villanueva De La Canada 28691, Spain.
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- Lazzarin, M. (författare)
- Univ Padua, Dept Phys & Astron G Galilei, I-35122 Padua, Italy.
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Lin, Z. -Y (författare)
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- Lopez-Moreno, J. J. (författare)
- Inst Astrofis Andalucia CSIC, Glorieta Astron, Granada 18008, Spain.
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- Magrin, S. (författare)
- Univ Padua, Dept Phys & Astron G Galilei, I-35122 Padua, Italy.
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- Marzari, F. (författare)
- Univ Padua, Dept Phys & Astron G Galilei, I-35122 Padua, Italy.
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- Michalik, H. (författare)
- Tech Univ Carolo Wilhelmina Braunschweig, Inst Geophys & Extraterr Phys, D-38106 Braunschweig, Germany.
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- Moissl-Fraund, R. (författare)
- ESA ESAC, Villanueva De La Canada 28691, Spain.
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- Moreno, F. (författare)
- Inst Astrofis Andalucia CSIC, Glorieta Astron, Granada 18008, Spain.
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- Mottola, S. (författare)
- Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch, D-12489 Berlin, Germany.
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- Naletto, G. (författare)
- Univ Padua, Ctr Studies & Act Space CISAS G Colombo, I-35131 Padua, Italy.;CNR IFN UOS Padova LUXOR, I-35131 Padua, Italy.;Univ Padua, Dept Informat Engn, I-35131 Padua, Italy.
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- Pajola, M. (författare)
- Univ Padua, Ctr Studies & Act Space CISAS G Colombo, I-35131 Padua, Italy.
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- Pommerol, A. (författare)
- Univ Bern, Inst Phys, CH-3012 Bern, Switzerland.
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- Thomas, N. (författare)
- Univ Bern, Inst Phys, CH-3012 Bern, Switzerland.
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- Sabau, M. D. (författare)
- Inst Nacl Tecn Aeroespacial, Madrid 28850, Spain.
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- Tubiana, C. (författare)
- Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany.
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Inst Astrofis Andalucia CSIC, Glorieta Astron, Granada 18008, Spain Univ Kent, Ctr Astrophys & Planetary Sci, Sch Phys Sci, Canterbury CT2 7NH, Kent, England. (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
- Context. During the most recent perihelion passage in 2009 of comet 67P/Churyumov-Gerasimenko (67P), ground-based observations showed an anisotropic dust coma where jet-like features were detected at similar to 1.3 AU from the Sun. The current perihelion passage is exceptional as the Rosetta spacecraft is monitoring the nucleus activity since March 2014, when a clear dust coma was already surrounding the nucleus at 4.3 AU from the Sun. Subsequently, the OSIRIS camera also witnessed an outburst in activity between April 27 and 30, and since mid-July, the dust coma at rh similar to 3.7-3.6 AU preperihelion is clearly non-isotropic, pointing to the existence of dust jet-like features. Aims. We aim to ascertain on the nucleus surface the origin of the dust jet-like features detected as early as in mid-July 2014. This will help to establish how the localized comet nucleus activity compares with that seen in previous apparitions and will also help following its evolution as the comet approaches its perihelion, at which phase most of the jets were detected from ground-based observations. Determining these areas also allows locating them in regions on the nucleus with spectroscopic or geomorphological distinct characteristics. Methods. Three series of dust images of comet 67P obtained with the Wide Angle Camera (WAC) of the OSIRIS instrument onboard the Rosetta spacecraft were processed with different enhancement techniques. This was made to clearly show the existence of jet-like features in the dust coma, whose appearance toward the observer changed as a result of the rotation of the comet nucleus and of the changing observing geometry from the spacecraft. The position angles of these features in the coma together with information on the observing geometry, nucleus shape, and rotation, allowed us to determine the most likely locations on the nucleus surface where the jets originate from. Results. Geometrical tracing of jet sources indicates that the activity of the nucleus of 67P gave rise during July and August 2014 to large-scale jet-like features from the Hapi, Hathor, Anuket, and Aten regions, confirming that active regions may be present on the nucleus localized at 60. northern latitude as deduced from previous comet apparitions. There are also hints that large-scale jets observed from the ground are possibly composed, at their place of origin on the nucleus surface, of numerous small-scale features.
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
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
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Lara, L. M.
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Lowry, S.
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Vincent, J. -B
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Gutierrez, P. J.
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Rozek, A.
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La Forgia, F.
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visa fler...
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Oklay, N.
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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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Auger, A. -T
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A'Hearn, M. F.
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Barucci, M. A.
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Bertaux, J. -L
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Bertini, I.
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Besse, S.
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Bodewits, D.
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Cremonese, G.
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Davidsson, Björn
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Da Deppo, V.
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Debei, S.
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De Cecco, M.
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El-Maarry, M. R.
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Ferri, F.
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Fornasier, S.
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Fulle, M.
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Groussin, O.
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Gutierrez-Marque ...
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Guettler, C.
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Hviid, S. F.
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Ip, W. -H
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Jorda, L.
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Knollenberg, J.
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Kovacs, G.
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Kramm, J. -R
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Kuehrt, E.
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Kueppers, M.
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Lazzarin, M.
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Lin, Z. -Y
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Lopez-Moreno, J. ...
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Magrin, S.
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Marzari, F.
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Michalik, H.
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Moissl-Fraund, R ...
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Moreno, F.
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Mottola, S.
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Naletto, G.
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Pajola, M.
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Pommerol, A.
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Thomas, N.
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Sabau, M. D.
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Tubiana, C.
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