Carbon-rich dust in comet 67P/Churyumov-Gerasimenko measured by COSIMA/Rosetta | Zendy

Anaïs Bardyn | Zendy; D. Baklouti | Zendy; Hervé Cottin | Zendy; N. Fray | Zendy; Christelle Briois | Zendy; John Paquette | Zendy; O. Stenzel | Zendy; C. Engrand | Zendy; H. Fischer | Zendy; Klaus Hornung | Zendy; Robin Isnard | Zendy; Y. Langevin | Zendy; H. J. Lehto | Zendy; L. Le Roy | Zendy; N. Ligier | Zendy; S. Merouane | Zendy; P. Modica | Zendy; FrançoisRégis OrthousDaunay | Zendy; J. Rynö | Zendy; R. Schulz | Zendy; J. Silén | Zendy; L. Thirkell | Zendy; Курт Вармуза | Zendy; B. Zaprudin | Zendy; J. Kissel | Zendy; M. Hilchenbach | Zendy

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Carbon-rich dust in comet 67P/Churyumov-Gerasimenko measured by COSIMA/Rosetta

Author(s) -

Anaïs Bardyn,

D. Baklouti,

Hervé Cottin,

N. Fray,

Christelle Briois,

John Paquette,

O. Stenzel,

C. Engrand,

H. Fischer,

Klaus Hornung,

Robin Isnard,

Y. Langevin,

H. J. Lehto,

L. Le Roy,

N. Ligier,

S. Merouane,

P. Modica,

FrançoisRégis OrthousDaunay,

J. Rynö,

R. Schulz,

J. Silén,

L. Thirkell,

Курт Вармуза,

B. Zaprudin,

J. Kissel,

M. Hilchenbach

Publication year - 2017

Publication title -

monthly notices of the royal astronomical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.058

H-Index - 383

eISSN - 1365-8711

pISSN - 0035-8711

DOI - 10.1093/mnras/stx2640

Subject(s) - comet , physics , jupiter (rocket family) , formation and evolution of the solar system , carbon fibers , astrobiology , astrochemistry , astrophysics , solar system , accretion (finance) , astronomy , interstellar medium , materials science , space shuttle , galaxy , composite number , composite material

Cometary ices are rich in CO2, CO and organic volatile compounds, but the carbon content of cometary dust was only measured for the Oort Cloud comet 1P/Halley, during its flyby in 1986. The COmetary Secondary Ion Mass Analyzer (COSIMA)/Rosetta mass spectrometer analysed dust particles with sizes ranging from 50 to 1000 mu m, collected over 2 yr, from 67P/Churyumov-Gerasimenko (67P), a Jupiter family comet. Here, we report 67P dust composition focusing on the elements C and O. It has a high carbon content (atomic C/Si = 5.5(-1.2)(+1.4) on average) close to the solar value and comparable to the 1P/Halley data. From COSIMA measurements, we conclude that 67P particles are made of nearly 50 per cent organic matter in mass, mixed with mineral phases that are mostly anhydrous. The whole composition, rich in carbon and non-hydrated minerals, points to a primitive matter that likely preserved its initial characteristics since the comet accretion in the outer regions of the protoplanetary disc.

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