Dust measurements in the coma of comet 67P/Churyumov-Gerasimenko inbound to the Sun | Zendy

A. Rotundi | Zendy; H. Sierks | Zendy; Vincenzo Della Corte | Zendy; M. Fulle | Zendy; P. J. Gutiérrez | Zendy; L. M. Lara | Zendy; C. Barbieri | Zendy; P. Lamy | Zendy; R. Rodrigo | Zendy; D. Koschny | Zendy; H. Rickman | Zendy; H. U. Keller | Zendy; J. J. LópezMoreno | Zendy; M. Accolla | Zendy; Jessica Agarwal | Zendy; Michael F. A’Hearn | Zendy; N. Altobelli | Zendy; F. Angrilli | Zendy; M. A. Barucci | Zendy; JeanLoup Bertaux | Zendy; Ivano Bertini | Zendy; Dennis Bodewits | Zendy; E. Bussoletti | Zendy; L. Colangelí | Zendy; M. Cosi | Zendy; G. Cremonese | Zendy; JeanFrançois Crifo | Zendy; V. Da Deppo | Zendy; B. Davidsson | Zendy; S. Debei | Zendy; M. De Cecco | Zendy; F. Esposito | Zendy; Marco Ferrari | Zendy; S. Fornasier | Zendy; F. Giovane | Zendy; B. Å. S. Gustafson | Zendy; Simon Green | Zendy; O. Groussin | Zendy; E. Grün | Zendy; C. Güttler | Zendy; M. Herranz | Zendy; S. F. Hviid | Zendy; Wing Ip | Zendy; Stavro Ivanovski | Zendy; J. M. Jerónimo | Zendy; L. Jordá | Zendy; Joerg Knollenberg | Zendy; R. Kramm | Zendy; E. Kührt | Zendy; M. Küppers | Zendy; M. Lazzarin | Zendy; M. R. Leese | Zendy; A. C. López Jiménez | Zendy; F. Lucarelli | Zendy; S. C. Lowry | Zendy; F. Marzari | Zendy; E. Mazzotta Epifani | Zendy; J. A. M. McDonnell | Zendy; V. Mennella | Zendy; H. Michalik | Zendy; A. Molina | Zendy; R. Morales | Zendy; F. Moreno | Zendy; S. Mottola | Zendy; G. Naletto | Zendy; N. Oklay | Zendy; J. L. Ortiz | Zendy; E. Palomba | Zendy; P. Palumbo | Zendy; J. M. Perrin | Zendy; Julio Rodríguez | Zendy; L. Sabau | Zendy; C. Snodgrass | Zendy; R. Sordini | Zendy; N. Thomas | Zendy; C. Tubiana | Zendy; JeanBaptiste Vincent | Zendy; P. R. Weissman | Zendy; Klaus-Peter Wenzel | Zendy; Vladimir Zakharov | Zendy; J. C. Zarnecki | Zendy

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Dust measurements in the coma of comet 67P/Churyumov-Gerasimenko inbound to the Sun

Author(s) -

A. Rotundi,

H. Sierks,

Vincenzo Della Corte,

M. Fulle,

P. J. Gutiérrez,

L. M. Lara,

C. Barbieri,

P. Lamy,

R. Rodrigo,

D. Koschny,

H. Rickman,

H. U. Keller,

J. J. LópezMoreno,

M. Accolla,

Jessica Agarwal,

Michael F. A’Hearn,

N. Altobelli,

F. Angrilli,

M. A. Barucci,

JeanLoup Bertaux,

Ivano Bertini,

Dennis Bodewits,

E. Bussoletti,

L. Colangelí,

M. Cosi,

G. Cremonese,

JeanFrançois Crifo,

V. Da Deppo,

B. Davidsson,

S. Debei,

M. De Cecco,

F. Esposito,

Marco Ferrari,

S. Fornasier,

F. Giovane,

B. Å. S. Gustafson,

Simon Green,

O. Groussin,

E. Grün,

C. Güttler,

M. Herranz,

S. F. Hviid,

Wing Ip,

Stavro Ivanovski,

J. M. Jerónimo,

L. Jordá,

Joerg Knollenberg,

R. Kramm,

E. Kührt,

M. Küppers,

M. Lazzarin,

M. R. Leese,

A. C. López Jiménez,

F. Lucarelli,

S. C. Lowry,

F. Marzari,

E. Mazzotta Epifani,

J. A. M. McDonnell,

V. Mennella,

H. Michalik,

A. Molina,

R. Morales,

F. Moreno,

S. Mottola,

G. Naletto,

N. Oklay,

J. L. Ortiz,

E. Palomba,

P. Palumbo,

J. M. Perrin,

Julio Rodríguez,

L. Sabau,

C. Snodgrass,

R. Sordini,

N. Thomas,

C. Tubiana,

JeanBaptiste Vincent,

P. R. Weissman,

Klaus-Peter Wenzel,

Vladimir Zakharov,

J. C. Zarnecki

Publication year - 2015

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.aaa3905

Subject(s) - comet , coma (optics) , astrobiology , environmental science , astronomy , physics

International audienceCritical measurements for understanding accretion and the dust/gas ratio in the solar nebula, where planets were forming 4.5 billion years ago, are being obtained by the GIADA (Grain Impact Analyser and Dust Accumulator) experiment on the European Space Agency’s Rosetta spacecraft orbiting comet 67P/Churyumov-Gerasimenko. Between 3.6 and 3.4 astronomical units inbound, GIADA and OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System) detected 35 outflowing grains of mass 10⁻¹⁰ to 10⁻⁷ kilograms, and 48 grains of mass 10⁻⁵ to 10⁻² kilograms, respectively. Combined with gas data from the MIRO (Microwave Instrument for the Rosetta Orbiter) and ROSINA (Rosetta Orbiter Spectrometer for Ion and Neutral Analysis) instruments, we find a dust/gas mass ratio of 4 ± 2 averaged over the sunlit nucleus surface. A cloud of larger grains also encircles the nucleus in bound orbits from the previous perihelion. The largest orbiting clumps are meter-sized, confirming the dust/gas ratio of 3 inferred at perihelion from models of dust comae and trails

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