Properties of the dust in the coma of 67P/Churyumov-Gerasimenko observed with VIRTIS- M

G. Rinaldi, Uwe - Fink, L. Doose, G. P. Tozzi, F. Capaccioni, G. Filacchione, D. Bockelée-Morvan, C. Leyrat, G. Piccioni, S. Erard, A. Bieler, M. Błecka, M. Ciarniello, M. Combi, N. Fougere, A. Migliorini, E. Palomba, A. Raponi, F. Taylor

Research output: Contribution to journalArticle

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Abstract

An investigation is presented of the dust scattering in the coma of 67P/Churyumov- Gerasimenko for the dates of 2015 February 28, March 15 and April 27. A comparison of the morphology of dust continuum maps at 1.1 μm and gas emission shows that for the above dates the spatial distribution of the dust is strongly correlated with H2O but not with CO2 emission. For April 27, the radial profile on the illuminated side of the nucleus in the inner coma agrees well with the direct simulation Monte Carlo (DSMC) calculations as the dust is accelerating and flows outwards but follows a 1/ρ distribution at distances larger than 4 km from the nucleus. The azimuthal distribution of the dust is narrower than the broader emission of the gas. Afρ values are 1.13 m for 2015 February 28, 2.02 m for April 27, while local values for March 15 are 2.3-5.3 m, depending on the nucleus illumination. In the inner coma, the spectral reflectivity from 0.35 to 3.5 μm displays a red slope with a change at around 1 μm. From 0.35 to 0.8 μm, the values range from 9 to 12 ± 1 per cent per 100 nm both on the sunlit side and on the dark side. From 1 to 2.5 μm, the values are 1.7 ± 0.2 per cent per 100 nm on the sunlit side and 3 ± 1 per cent per 100 nm on the dark side. For the August 26 jet, no significant increase of the colour gradient with distance from the nucleus could be observed, nor any significant difference detected between the jet and the background coma.

Original languageEnglish (US)
Pages (from-to)S547-S561
JournalMonthly Notices of the Royal Astronomical Society
Volume462
DOIs
StatePublished - 2016

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coma
dust
nuclei
gases
gas
reflectivity
spatial distribution
illumination
scattering
slopes
continuums
reflectance
color
gradients
profiles
simulation
distribution

Keywords

  • Comets: individual: 67P/Churyumov-Gerasimenko
  • Methods: data analysis
  • Methods: observational
  • Techniques: imaging spectroscopy

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Properties of the dust in the coma of 67P/Churyumov-Gerasimenko observed with VIRTIS- M. / Rinaldi, G.; Fink, Uwe -; Doose, L.; Tozzi, G. P.; Capaccioni, F.; Filacchione, G.; Bockelée-Morvan, D.; Leyrat, C.; Piccioni, G.; Erard, S.; Bieler, A.; Błecka, M.; Ciarniello, M.; Combi, M.; Fougere, N.; Migliorini, A.; Palomba, E.; Raponi, A.; Taylor, F.

In: Monthly Notices of the Royal Astronomical Society, Vol. 462, 2016, p. S547-S561.

Research output: Contribution to journalArticle

Rinaldi, G, Fink, U, Doose, L, Tozzi, GP, Capaccioni, F, Filacchione, G, Bockelée-Morvan, D, Leyrat, C, Piccioni, G, Erard, S, Bieler, A, Błecka, M, Ciarniello, M, Combi, M, Fougere, N, Migliorini, A, Palomba, E, Raponi, A & Taylor, F 2016, 'Properties of the dust in the coma of 67P/Churyumov-Gerasimenko observed with VIRTIS- M', Monthly Notices of the Royal Astronomical Society, vol. 462, pp. S547-S561. https://doi.org/10.1093/mnras/stw3197
Rinaldi, G. ; Fink, Uwe - ; Doose, L. ; Tozzi, G. P. ; Capaccioni, F. ; Filacchione, G. ; Bockelée-Morvan, D. ; Leyrat, C. ; Piccioni, G. ; Erard, S. ; Bieler, A. ; Błecka, M. ; Ciarniello, M. ; Combi, M. ; Fougere, N. ; Migliorini, A. ; Palomba, E. ; Raponi, A. ; Taylor, F. / Properties of the dust in the coma of 67P/Churyumov-Gerasimenko observed with VIRTIS- M. In: Monthly Notices of the Royal Astronomical Society. 2016 ; Vol. 462. pp. S547-S561.
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abstract = "An investigation is presented of the dust scattering in the coma of 67P/Churyumov- Gerasimenko for the dates of 2015 February 28, March 15 and April 27. A comparison of the morphology of dust continuum maps at 1.1 μm and gas emission shows that for the above dates the spatial distribution of the dust is strongly correlated with H2O but not with CO2 emission. For April 27, the radial profile on the illuminated side of the nucleus in the inner coma agrees well with the direct simulation Monte Carlo (DSMC) calculations as the dust is accelerating and flows outwards but follows a 1/ρ distribution at distances larger than 4 km from the nucleus. The azimuthal distribution of the dust is narrower than the broader emission of the gas. Afρ values are 1.13 m for 2015 February 28, 2.02 m for April 27, while local values for March 15 are 2.3-5.3 m, depending on the nucleus illumination. In the inner coma, the spectral reflectivity from 0.35 to 3.5 μm displays a red slope with a change at around 1 μm. From 0.35 to 0.8 μm, the values range from 9 to 12 ± 1 per cent per 100 nm both on the sunlit side and on the dark side. From 1 to 2.5 μm, the values are 1.7 ± 0.2 per cent per 100 nm on the sunlit side and 3 ± 1 per cent per 100 nm on the dark side. For the August 26 jet, no significant increase of the colour gradient with distance from the nucleus could be observed, nor any significant difference detected between the jet and the background coma.",
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T1 - Properties of the dust in the coma of 67P/Churyumov-Gerasimenko observed with VIRTIS- M

AU - Rinaldi, G.

AU - Fink, Uwe -

AU - Doose, L.

AU - Tozzi, G. P.

AU - Capaccioni, F.

AU - Filacchione, G.

AU - Bockelée-Morvan, D.

AU - Leyrat, C.

AU - Piccioni, G.

AU - Erard, S.

AU - Bieler, A.

AU - Błecka, M.

AU - Ciarniello, M.

AU - Combi, M.

AU - Fougere, N.

AU - Migliorini, A.

AU - Palomba, E.

AU - Raponi, A.

AU - Taylor, F.

PY - 2016

Y1 - 2016

N2 - An investigation is presented of the dust scattering in the coma of 67P/Churyumov- Gerasimenko for the dates of 2015 February 28, March 15 and April 27. A comparison of the morphology of dust continuum maps at 1.1 μm and gas emission shows that for the above dates the spatial distribution of the dust is strongly correlated with H2O but not with CO2 emission. For April 27, the radial profile on the illuminated side of the nucleus in the inner coma agrees well with the direct simulation Monte Carlo (DSMC) calculations as the dust is accelerating and flows outwards but follows a 1/ρ distribution at distances larger than 4 km from the nucleus. The azimuthal distribution of the dust is narrower than the broader emission of the gas. Afρ values are 1.13 m for 2015 February 28, 2.02 m for April 27, while local values for March 15 are 2.3-5.3 m, depending on the nucleus illumination. In the inner coma, the spectral reflectivity from 0.35 to 3.5 μm displays a red slope with a change at around 1 μm. From 0.35 to 0.8 μm, the values range from 9 to 12 ± 1 per cent per 100 nm both on the sunlit side and on the dark side. From 1 to 2.5 μm, the values are 1.7 ± 0.2 per cent per 100 nm on the sunlit side and 3 ± 1 per cent per 100 nm on the dark side. For the August 26 jet, no significant increase of the colour gradient with distance from the nucleus could be observed, nor any significant difference detected between the jet and the background coma.

AB - An investigation is presented of the dust scattering in the coma of 67P/Churyumov- Gerasimenko for the dates of 2015 February 28, March 15 and April 27. A comparison of the morphology of dust continuum maps at 1.1 μm and gas emission shows that for the above dates the spatial distribution of the dust is strongly correlated with H2O but not with CO2 emission. For April 27, the radial profile on the illuminated side of the nucleus in the inner coma agrees well with the direct simulation Monte Carlo (DSMC) calculations as the dust is accelerating and flows outwards but follows a 1/ρ distribution at distances larger than 4 km from the nucleus. The azimuthal distribution of the dust is narrower than the broader emission of the gas. Afρ values are 1.13 m for 2015 February 28, 2.02 m for April 27, while local values for March 15 are 2.3-5.3 m, depending on the nucleus illumination. In the inner coma, the spectral reflectivity from 0.35 to 3.5 μm displays a red slope with a change at around 1 μm. From 0.35 to 0.8 μm, the values range from 9 to 12 ± 1 per cent per 100 nm both on the sunlit side and on the dark side. From 1 to 2.5 μm, the values are 1.7 ± 0.2 per cent per 100 nm on the sunlit side and 3 ± 1 per cent per 100 nm on the dark side. For the August 26 jet, no significant increase of the colour gradient with distance from the nucleus could be observed, nor any significant difference detected between the jet and the background coma.

KW - Comets: individual: 67P/Churyumov-Gerasimenko

KW - Methods: data analysis

KW - Methods: observational

KW - Techniques: imaging spectroscopy

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