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  Post-perihelion photometry of dust grains in the coma of 67P Churyumov–Gerasimenko

Frattin, E., Cremonese, G., Simioni, E., Bertini, I., Lazzarin, M., Ott, T., et al. (2017). Post-perihelion photometry of dust grains in the coma of 67P Churyumov–Gerasimenko. Monthly Notices of the Royal Astronomical Society, 469(Suppl. 2), S195-S203. doi:10.1093/mnras/stx1395.

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Frattin, E., Author
Cremonese, G., Author
Simioni, E., Author
Bertini, I., Author
Lazzarin, M., Author
Ott, T., Author
Drolshagen, E., Author
La Forgia, F., Author
Sierks, Holger1, Author              
Barbieri, C., Author
Lamy, P., Author
Rodrigo, R., Author
Koschny, D., Author
Rickman, H., Author
Keller, H. U., Author
Agarwal, Jessica1, Author              
A'Hearn, M. F., Author
Barucci, M. A., Author
Bertaux, J.-L., Author
Deppo, V. Da, Author
Davidsson, B., AuthorDebei, S., AuthorCecco, M. De, AuthorDeller, Jakob1, Author              Ferrari, S., AuthorFerri, F., AuthorFornasier, S., AuthorFulle, M., AuthorGicquel, A., AuthorGroussin, O., AuthorGutierrez, P. J., AuthorGüttler, C., AuthorHofmann, M., AuthorHviid, S. F., AuthorIp, W.-H., AuthorJorda, L., AuthorKnollenberg, J., AuthorKramm, J.-R., AuthorKührt, E., AuthorKüppers, M., AuthorLara, L. M., AuthorMoreno, J. J. Lopez, AuthorLucchetti, A., AuthorMarzari, F., AuthorMassironi, M., AuthorMottola, S., AuthorNaletto, G., AuthorOklay, N., AuthorPajola, M., AuthorPenasa, L., AuthorShi, X., AuthorThomas, N., AuthorTubiana, C., AuthorVincent, J.-B., Author more..
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              


Free keywords: -
 MPIS_GROUPS: Planets and Comets
 Abstract: We present a photometric analysis of individual dust grains in the coma of comet 67P/Churyumov–Gerasimenko using OSIRIS images taken from 2015 July to 2016 January. We analysed a sample of 555 taken during 18 d at heliocentric distances ranging between 1.25 and 2.04 au and at nucleocentric distances between 80 and 437 km. An automated method to detect the tracks was specifically developed. The images were taken by OSIRIS NAC in four different filters: Near-IR (882 nm), Orange (649 nm), FarOrange (649 nm) and Blue (480 nm). It was not always possible to recognize all the grains in the four filters, hence we measured the spectral slope in two wavelengths ranges: in the interval [480–649] nm, for 1179 grains, and in the interval [649–882] nm, for 746 grains. We studied the evolution of the two populations’ average spectral slopes. The data result scattered around the average value in the range [480–649] nm, while in the [649–882] nm we observe a slight decreasing moving away from the Sun as well as a slight increasing with the nucleocentric distance. A spectrophotometric analysis was performed on a subsample of 339 grains. Three major groups were defined, based on the spectral slope between [535–882] nm: (i) the steep spectra that may be related with organic material, (ii) the spectra with an intermediate slope, likely a mixture of silicates and organics and (iii) flat spectra that may be associated with a high abundance of water ice.


Language(s): eng - English
 Dates: 2017-12-142017
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/stx1395
 Degree: -



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Source 1

Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 469 (Suppl. 2) Sequence Number: - Start / End Page: S195 - S203 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150