Models of Rosetta/OSIRIS 67P dust coma phase function
Fernando Moreno
(1)
,
Daniel Guirado
(1)
,
Olga Muñoz
(1)
,
Ivano Bertini
(2)
,
Cécilia Tubiana
(3)
,
Carsten Güttler
(3)
,
Marco Fulle
(4)
,
Alessandra Rotundi
(5, 6)
,
Vincenzo Della Corte
(5, 6)
,
Stavro Ivanovski
(5)
,
Giovanna Rinaldi
(5)
,
Dominique Bockelée-Morvan
(7)
,
Vladimir Zakharov
(8, 5)
,
Jessica Agarwal
(3)
,
Stefano Mottola
(9)
,
Imre Toth
(10)
,
Elisa Frattin
(2)
,
Luisa Maria Lara
(1)
,
Pedro J. Gutiérrez
(1)
,
Zhong Yi Lin
(11)
,
Ludmilla Kolokolova
(12)
,
Holger Sierks
(3)
,
Giampiero Naletto
(13, 14, 2)
,
Philippe Lamy
(15)
,
Rafael Rodrigo
(16, 17)
,
Detlief Koschny
(18)
,
Björn Davidsson
(19)
,
Maria Antonietta Barucci
(7)
,
Jean-Loup Bertaux
(15)
,
Dennis Bodewits
(12)
,
Gabriele Cremonese
(20)
,
Vania da Deppo
(21)
,
Stefano Debei
(22)
,
Mariolino de Cecco
(23)
,
Jakob Deller
(3)
,
Sonia Fornasier
(7)
,
Wing-H. Ip
(24, 25)
,
Horst Uwe Keller
(9, 26)
,
Monica Lazzarin
(2)
,
José Juan Moreno
(1)
,
Francesco Marzari
(2)
,
Xian Shi
(3)
1
IAA -
Instituto de Astrofísica de Andalucía
2 Dipartimento di Fisica e Astronomia "Galileo Galilei"
3 MPS - Max-Planck-Institut für Sonnensystemforschung
4 OAT - INAF - Osservatorio Astronomico di Trieste
5 IAPS - Istituto di Astrofisica e Planetologia Spaziali - INAF
6 DIST - Dipartimento di Scienze e Tecnologie [Napoli]
7 LESIA (UMR_8109) - Laboratoire d'études spatiales et d'instrumentation en astrophysique
8 LMD - Laboratoire de Météorologie Dynamique (UMR 8539)
9 DLR Institut für Planetenforschung
10 Konkoly Observatory
11 NCU - National Central University [Taiwan]
12 Department of Astronomy [College Park]
13 CISAS - Centro di Ateneo di Studi e Attività Spaziali “Giuseppe Colombo”
14 IFN - CNR Istituto di Fotonica e Nanotecnologie [Padova]
15 PLANETO - LATMOS
16 CAB - Centro de Astrobiologia [Madrid]
17 ISSI - International Space Science Institute [Bern]
18 RSSD - Research and Scientific Support Department, ESTEC
19 JPL - Jet Propulsion Laboratory
20 OAPD - INAF - Osservatorio Astronomico di Padova
21 IFN - CNR Institute for Photonics and Nanotechnologies
22 Department of Industrial Engineering [Padova]
23 University of Trento [Trento]
24 Institute of Space Science [Taiwan]
25 SSI - Space Science Institute [Macau]
26 IGEP - Institut für Geophysik und Extraterrestrische Physik [Braunschweig]
2 Dipartimento di Fisica e Astronomia "Galileo Galilei"
3 MPS - Max-Planck-Institut für Sonnensystemforschung
4 OAT - INAF - Osservatorio Astronomico di Trieste
5 IAPS - Istituto di Astrofisica e Planetologia Spaziali - INAF
6 DIST - Dipartimento di Scienze e Tecnologie [Napoli]
7 LESIA (UMR_8109) - Laboratoire d'études spatiales et d'instrumentation en astrophysique
8 LMD - Laboratoire de Météorologie Dynamique (UMR 8539)
9 DLR Institut für Planetenforschung
10 Konkoly Observatory
11 NCU - National Central University [Taiwan]
12 Department of Astronomy [College Park]
13 CISAS - Centro di Ateneo di Studi e Attività Spaziali “Giuseppe Colombo”
14 IFN - CNR Istituto di Fotonica e Nanotecnologie [Padova]
15 PLANETO - LATMOS
16 CAB - Centro de Astrobiologia [Madrid]
17 ISSI - International Space Science Institute [Bern]
18 RSSD - Research and Scientific Support Department, ESTEC
19 JPL - Jet Propulsion Laboratory
20 OAPD - INAF - Osservatorio Astronomico di Padova
21 IFN - CNR Institute for Photonics and Nanotechnologies
22 Department of Industrial Engineering [Padova]
23 University of Trento [Trento]
24 Institute of Space Science [Taiwan]
25 SSI - Space Science Institute [Macau]
26 IGEP - Institut für Geophysik und Extraterrestrische Physik [Braunschweig]
Vincenzo Della Corte
- Function : Author
- PersonId : 773095
- ORCID : 0000-0001-6461-5803
Stavro Ivanovski
- Function : Author
- PersonId : 773096
- ORCID : 0000-0002-8068-7695
Giovanna Rinaldi
- Function : Author
- PersonId : 828529
Dominique Bockelée-Morvan
- Function : Author
- PersonId : 741231
- IdHAL : dominique-bockelee-morvan
- IdRef : 081525680
Vania da Deppo
- Function : Author
- PersonId : 763247
- ORCID : 0000-0001-6273-8738
Abstract
The phase function of the dust coma of comet 67P has been determined from Rosetta/OSIRIS images. This function shows a deep minimum at phase angles near 100°, and a strong backscattering enhancement. These two properties cannot be reproduced by regular models of cometary dust, most of them based on wavelength-sized and randomly oriented aggregate particles. We show, however, that an ensemble of oriented elongated particles of a wide variety of aspect ratios, with radii r gsim 10 μm, and whose long axes are perpendicular to the direction of the solar radiation, are capable of reproducing the observed phase function. These particles must be absorbing, with an imaginary part of the refractive index of about 0.1 to match the expected geometric albedo, and with porosity in the 60%–70% range.
Origin : Files produced by the author(s)
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