Identification of spectral units on Phoebe

A. Coradini, F. Tosi, A. I. Gavrishin, F. Capaccioni, P. Cerroni, G. Filacchione, A. Adriani, Robert H. Brown, G. Bellucci, V. Formisano, E. D'Aversa, J. I. Lunine, K. H. Baines, J. P. Bibring, B. J. Buratti, R. N. Clark, D. P. Cruikshank, M. Combes, P. Drossart, R. JaumannY. Langevin, D. L. Matson, T. B. McCord, V. Mennella, R. M. Nelson, P. D. Nicholson, B. Sicardy, C. Sotin, M. M. Hedman, G. B. Hansen, C. A. Hibbitts, M. Showalter, Caitlin Griffith, G. Strazzulla

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We apply a multivariate statistical method to the Phoebe spectra collected by the VIMS experiment onboard the Cassini spacecraft during the flyby of June 2004. The G-mode clustering method, which permits identification of the most important features in a spectrum, is used on a small subset of data, characterized by medium and high spatial resolution, to perform a raw spectral classification of the surface of Phoebe. The combination of statistics and comparative analysis of the different areas using both the VIMS and ISS data is explored in order to highlight possible correlations with the surface geology. In general, the results by Clark et al. [Clark, R.N., Brown, R.H., Jaumann, R., Cruikshank, D.P., Nelson, R.M., Buratti, B.J., McCord, T.B., Lunine, J., Hoefen, T., Curchin, J.M., Hansen, G., Hibbitts, K., Matz, K.-D., Baines, K.H., Bellucci, G., Bibring, J.-P., Capaccioni, F., Cerroni, P., Coradini, A., Formisano, V., Langevin, Y., Matson, D.L., Mennella, V., Nicholson, P.D., Sicardy, B., Sotin, C., 2005. Nature 435, 66-69] are confirmed; but we also identify new signatures not reported before, such as the aliphatic CH stretch at 3.53 μm and the ∼4.4 μm feature possibly related to cyanide compounds. On the basis of the band strengths computed for several absorption features and for the homogeneous spectral types isolated by the G-mode, a strong correlation of CO2 and aromatic hydrocarbons with exposed water ice, where the uniform layer covering Phoebe has been removed, is established. On the other hand, an anti-correlation of cyanide compounds with CO2 is suggested at a medium resolution scale.

Original languageEnglish (US)
Pages (from-to)233-251
Number of pages19
JournalIcarus
Volume193
Issue number1
DOIs
StatePublished - Jan 2008

Fingerprint

Phoebe
cyanides
cyanide
International Space Station
geology
aromatic hydrocarbon
set theory
spacecraft
ice
spatial resolution
coverings
hydrocarbons
signatures
statistics
methylidyne
high resolution
water
experiment
method

Keywords

  • composition
  • Irregular satellites
  • satellites
  • Satellites
  • Saturn
  • Spectroscopy

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Coradini, A., Tosi, F., Gavrishin, A. I., Capaccioni, F., Cerroni, P., Filacchione, G., ... Strazzulla, G. (2008). Identification of spectral units on Phoebe. Icarus, 193(1), 233-251. https://doi.org/10.1016/j.icarus.2007.07.023

Identification of spectral units on Phoebe. / Coradini, A.; Tosi, F.; Gavrishin, A. I.; Capaccioni, F.; Cerroni, P.; Filacchione, G.; Adriani, A.; Brown, Robert H.; Bellucci, G.; Formisano, V.; D'Aversa, E.; Lunine, J. I.; Baines, K. H.; Bibring, J. P.; Buratti, B. J.; Clark, R. N.; Cruikshank, D. P.; Combes, M.; Drossart, P.; Jaumann, R.; Langevin, Y.; Matson, D. L.; McCord, T. B.; Mennella, V.; Nelson, R. M.; Nicholson, P. D.; Sicardy, B.; Sotin, C.; Hedman, M. M.; Hansen, G. B.; Hibbitts, C. A.; Showalter, M.; Griffith, Caitlin; Strazzulla, G.

In: Icarus, Vol. 193, No. 1, 01.2008, p. 233-251.

Research output: Contribution to journalArticle

Coradini, A, Tosi, F, Gavrishin, AI, Capaccioni, F, Cerroni, P, Filacchione, G, Adriani, A, Brown, RH, Bellucci, G, Formisano, V, D'Aversa, E, Lunine, JI, Baines, KH, Bibring, JP, Buratti, BJ, Clark, RN, Cruikshank, DP, Combes, M, Drossart, P, Jaumann, R, Langevin, Y, Matson, DL, McCord, TB, Mennella, V, Nelson, RM, Nicholson, PD, Sicardy, B, Sotin, C, Hedman, MM, Hansen, GB, Hibbitts, CA, Showalter, M, Griffith, C & Strazzulla, G 2008, 'Identification of spectral units on Phoebe', Icarus, vol. 193, no. 1, pp. 233-251. https://doi.org/10.1016/j.icarus.2007.07.023
Coradini A, Tosi F, Gavrishin AI, Capaccioni F, Cerroni P, Filacchione G et al. Identification of spectral units on Phoebe. Icarus. 2008 Jan;193(1):233-251. https://doi.org/10.1016/j.icarus.2007.07.023
Coradini, A. ; Tosi, F. ; Gavrishin, A. I. ; Capaccioni, F. ; Cerroni, P. ; Filacchione, G. ; Adriani, A. ; Brown, Robert H. ; Bellucci, G. ; Formisano, V. ; D'Aversa, E. ; Lunine, J. I. ; Baines, K. H. ; Bibring, J. P. ; Buratti, B. J. ; Clark, R. N. ; Cruikshank, D. P. ; Combes, M. ; Drossart, P. ; Jaumann, R. ; Langevin, Y. ; Matson, D. L. ; McCord, T. B. ; Mennella, V. ; Nelson, R. M. ; Nicholson, P. D. ; Sicardy, B. ; Sotin, C. ; Hedman, M. M. ; Hansen, G. B. ; Hibbitts, C. A. ; Showalter, M. ; Griffith, Caitlin ; Strazzulla, G. / Identification of spectral units on Phoebe. In: Icarus. 2008 ; Vol. 193, No. 1. pp. 233-251.
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abstract = "We apply a multivariate statistical method to the Phoebe spectra collected by the VIMS experiment onboard the Cassini spacecraft during the flyby of June 2004. The G-mode clustering method, which permits identification of the most important features in a spectrum, is used on a small subset of data, characterized by medium and high spatial resolution, to perform a raw spectral classification of the surface of Phoebe. The combination of statistics and comparative analysis of the different areas using both the VIMS and ISS data is explored in order to highlight possible correlations with the surface geology. In general, the results by Clark et al. [Clark, R.N., Brown, R.H., Jaumann, R., Cruikshank, D.P., Nelson, R.M., Buratti, B.J., McCord, T.B., Lunine, J., Hoefen, T., Curchin, J.M., Hansen, G., Hibbitts, K., Matz, K.-D., Baines, K.H., Bellucci, G., Bibring, J.-P., Capaccioni, F., Cerroni, P., Coradini, A., Formisano, V., Langevin, Y., Matson, D.L., Mennella, V., Nicholson, P.D., Sicardy, B., Sotin, C., 2005. Nature 435, 66-69] are confirmed; but we also identify new signatures not reported before, such as the aliphatic CH stretch at 3.53 μm and the ∼4.4 μm feature possibly related to cyanide compounds. On the basis of the band strengths computed for several absorption features and for the homogeneous spectral types isolated by the G-mode, a strong correlation of CO2 and aromatic hydrocarbons with exposed water ice, where the uniform layer covering Phoebe has been removed, is established. On the other hand, an anti-correlation of cyanide compounds with CO2 is suggested at a medium resolution scale.",
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T1 - Identification of spectral units on Phoebe

AU - Coradini, A.

AU - Tosi, F.

AU - Gavrishin, A. I.

AU - Capaccioni, F.

AU - Cerroni, P.

AU - Filacchione, G.

AU - Adriani, A.

AU - Brown, Robert H.

AU - Bellucci, G.

AU - Formisano, V.

AU - D'Aversa, E.

AU - Lunine, J. I.

AU - Baines, K. H.

AU - Bibring, J. P.

AU - Buratti, B. J.

AU - Clark, R. N.

AU - Cruikshank, D. P.

AU - Combes, M.

AU - Drossart, P.

AU - Jaumann, R.

AU - Langevin, Y.

AU - Matson, D. L.

AU - McCord, T. B.

AU - Mennella, V.

AU - Nelson, R. M.

AU - Nicholson, P. D.

AU - Sicardy, B.

AU - Sotin, C.

AU - Hedman, M. M.

AU - Hansen, G. B.

AU - Hibbitts, C. A.

AU - Showalter, M.

AU - Griffith, Caitlin

AU - Strazzulla, G.

PY - 2008/1

Y1 - 2008/1

N2 - We apply a multivariate statistical method to the Phoebe spectra collected by the VIMS experiment onboard the Cassini spacecraft during the flyby of June 2004. The G-mode clustering method, which permits identification of the most important features in a spectrum, is used on a small subset of data, characterized by medium and high spatial resolution, to perform a raw spectral classification of the surface of Phoebe. The combination of statistics and comparative analysis of the different areas using both the VIMS and ISS data is explored in order to highlight possible correlations with the surface geology. In general, the results by Clark et al. [Clark, R.N., Brown, R.H., Jaumann, R., Cruikshank, D.P., Nelson, R.M., Buratti, B.J., McCord, T.B., Lunine, J., Hoefen, T., Curchin, J.M., Hansen, G., Hibbitts, K., Matz, K.-D., Baines, K.H., Bellucci, G., Bibring, J.-P., Capaccioni, F., Cerroni, P., Coradini, A., Formisano, V., Langevin, Y., Matson, D.L., Mennella, V., Nicholson, P.D., Sicardy, B., Sotin, C., 2005. Nature 435, 66-69] are confirmed; but we also identify new signatures not reported before, such as the aliphatic CH stretch at 3.53 μm and the ∼4.4 μm feature possibly related to cyanide compounds. On the basis of the band strengths computed for several absorption features and for the homogeneous spectral types isolated by the G-mode, a strong correlation of CO2 and aromatic hydrocarbons with exposed water ice, where the uniform layer covering Phoebe has been removed, is established. On the other hand, an anti-correlation of cyanide compounds with CO2 is suggested at a medium resolution scale.

AB - We apply a multivariate statistical method to the Phoebe spectra collected by the VIMS experiment onboard the Cassini spacecraft during the flyby of June 2004. The G-mode clustering method, which permits identification of the most important features in a spectrum, is used on a small subset of data, characterized by medium and high spatial resolution, to perform a raw spectral classification of the surface of Phoebe. The combination of statistics and comparative analysis of the different areas using both the VIMS and ISS data is explored in order to highlight possible correlations with the surface geology. In general, the results by Clark et al. [Clark, R.N., Brown, R.H., Jaumann, R., Cruikshank, D.P., Nelson, R.M., Buratti, B.J., McCord, T.B., Lunine, J., Hoefen, T., Curchin, J.M., Hansen, G., Hibbitts, K., Matz, K.-D., Baines, K.H., Bellucci, G., Bibring, J.-P., Capaccioni, F., Cerroni, P., Coradini, A., Formisano, V., Langevin, Y., Matson, D.L., Mennella, V., Nicholson, P.D., Sicardy, B., Sotin, C., 2005. Nature 435, 66-69] are confirmed; but we also identify new signatures not reported before, such as the aliphatic CH stretch at 3.53 μm and the ∼4.4 μm feature possibly related to cyanide compounds. On the basis of the band strengths computed for several absorption features and for the homogeneous spectral types isolated by the G-mode, a strong correlation of CO2 and aromatic hydrocarbons with exposed water ice, where the uniform layer covering Phoebe has been removed, is established. On the other hand, an anti-correlation of cyanide compounds with CO2 is suggested at a medium resolution scale.

KW - composition

KW - Irregular satellites

KW - satellites

KW - Satellites

KW - Saturn

KW - Spectroscopy

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