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American Astronomical Society, Astrophysical Journal Letters, 1(802), p. L12, 2015

DOI: 10.1088/2041-8205/802/1/l12

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DENSITY AND CHARGE OF PRISTINE FLUFFY PARTICLES FROM COMET 67p/CHURYUMOV–GERASIMENKO

Journal article published in 2015 by M. Fulle ORCID, V. Della Corte ORCID, A. Rotundi ORCID, P. Weissman, A. Juhasz, K. Szego, R. Sordini, M. Ferrari, S. Ivanovski ORCID, F. Lucarelli, M. Accolla, S. Merouane ORCID, V. Zakharov, E. Mazzotta Epifani ORCID, J. Rodríguez and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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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