DENSITY AND CHARGE of PRISTINE FLUFFY PARTICLES FROM COMET 67P/CHURYUMOV-GERASIMENKO

M. Fulle, V. Della Corte, A. Rotundi, P. Weissman, A. Juhasz, K. Szegö, R. Sordini, M. Ferrari, S. Ivanovski, F. Lucarelli, M. Accolla, S. Merouane, V. Zakharov, E. Mazzotta Epifani, J. J. López-Moreno, J. Rodríguez, L. Colangeli, P. Palumbo, E. Grün, M. Hilchenbach & 21 others E. Bussoletti, F. Esposito, S. F. Green, P. L. Lamy, J. A M McDonnell, V. Mennella, A. Molina, R. Morales, F. Moreno, J. L. Ortiz, E. Palomba, R. Rodrigo, J. C. Zarnecki, M. Cosi, F. Giovane, B. Gustafson, M. L. Herranz, J. M. Jerónimo, M. R. Leese, A. C. López-Jiménez, N. Altobelli

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

The Grain Impact Analyzer and Dust Accumulator (GIADA) instrument on board ESA's Rosetta mission is constraining the origin of the dust particles detected within the coma of comet 67 P/Churyumov-Gerasimenko (67P). The collected particles belong to two families: (i) compact particles (ranging in size from 0.03 to 1 mm), witnessing the presence of materials that underwent processing within the solar nebula and (ii) fluffy aggregates (ranging in size from 0.2 to 2.5 mm) of sub-micron grains that may be a record of a primitive component, probably linked to interstellar dust. The dynamics of the fluffy aggregates constrain their equivalent bulk density to <kg m-3. These aggregates are charged, fragmented, and decelerated by the spacecraft negative potential and enter GIADA in showers of fragments at speeds -1. The density of such optically thick aggregates is consistent with the low bulk density of the nucleus. The mass contribution of the fluffy aggregates to the refractory component of the nucleus is negligible and their coma brightness contribution is less than 15%.

Original languageEnglish
Article numberL12
JournalAstrophysical Journal Letters
Volume802
Issue number1
DOIs
Publication statusPublished - Mar 20 2015

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comets
comet
dust
coma
accumulators
bulk density
analyzers
Rosetta mission
solar nebula
nuclei
refractories
showers
European Space Agency
spacecraft
brightness
fragments
particle
accumulator

Keywords

  • comets
  • general - comets
  • individual (67P/Churyumov-Gerasimenko) - space vehicles
  • instruments

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

DENSITY AND CHARGE of PRISTINE FLUFFY PARTICLES FROM COMET 67P/CHURYUMOV-GERASIMENKO. / Fulle, M.; Corte, V. Della; Rotundi, A.; Weissman, P.; Juhasz, A.; Szegö, K.; Sordini, R.; Ferrari, M.; Ivanovski, S.; Lucarelli, F.; Accolla, M.; Merouane, S.; Zakharov, V.; Epifani, E. Mazzotta; López-Moreno, J. J.; Rodríguez, J.; Colangeli, L.; Palumbo, P.; Grün, E.; Hilchenbach, M.; Bussoletti, E.; Esposito, F.; Green, S. F.; Lamy, P. L.; McDonnell, J. A M; Mennella, V.; Molina, A.; Morales, R.; Moreno, F.; Ortiz, J. L.; Palomba, E.; Rodrigo, R.; Zarnecki, J. C.; Cosi, M.; Giovane, F.; Gustafson, B.; Herranz, M. L.; Jerónimo, J. M.; Leese, M. R.; López-Jiménez, A. C.; Altobelli, N.

In: Astrophysical Journal Letters, Vol. 802, No. 1, L12, 20.03.2015.

Research output: Contribution to journalArticle

Fulle, M, Corte, VD, Rotundi, A, Weissman, P, Juhasz, A, Szegö, K, Sordini, R, Ferrari, M, Ivanovski, S, Lucarelli, F, Accolla, M, Merouane, S, Zakharov, V, Epifani, EM, López-Moreno, JJ, Rodríguez, J, Colangeli, L, Palumbo, P, Grün, E, Hilchenbach, M, Bussoletti, E, Esposito, F, Green, SF, Lamy, PL, McDonnell, JAM, Mennella, V, Molina, A, Morales, R, Moreno, F, Ortiz, JL, Palomba, E, Rodrigo, R, Zarnecki, JC, Cosi, M, Giovane, F, Gustafson, B, Herranz, ML, Jerónimo, JM, Leese, MR, López-Jiménez, AC & Altobelli, N 2015, 'DENSITY AND CHARGE of PRISTINE FLUFFY PARTICLES FROM COMET 67P/CHURYUMOV-GERASIMENKO', Astrophysical Journal Letters, vol. 802, no. 1, L12. https://doi.org/10.1088/2041-8205/802/1/L12
Fulle, M. ; Corte, V. Della ; Rotundi, A. ; Weissman, P. ; Juhasz, A. ; Szegö, K. ; Sordini, R. ; Ferrari, M. ; Ivanovski, S. ; Lucarelli, F. ; Accolla, M. ; Merouane, S. ; Zakharov, V. ; Epifani, E. Mazzotta ; López-Moreno, J. J. ; Rodríguez, J. ; Colangeli, L. ; Palumbo, P. ; Grün, E. ; Hilchenbach, M. ; Bussoletti, E. ; Esposito, F. ; Green, S. F. ; Lamy, P. L. ; McDonnell, J. A M ; Mennella, V. ; Molina, A. ; Morales, R. ; Moreno, F. ; Ortiz, J. L. ; Palomba, E. ; Rodrigo, R. ; Zarnecki, J. C. ; Cosi, M. ; Giovane, F. ; Gustafson, B. ; Herranz, M. L. ; Jerónimo, J. M. ; Leese, M. R. ; López-Jiménez, A. C. ; Altobelli, N. / DENSITY AND CHARGE of PRISTINE FLUFFY PARTICLES FROM COMET 67P/CHURYUMOV-GERASIMENKO. In: Astrophysical Journal Letters. 2015 ; Vol. 802, No. 1.
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