Quarterly
Q3 - 2008
(May - July 2008)
1 <date>

Quarterly
2
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:
Plotted here as a function of UTC are:
(1) the altitude above Enceladus' limb of the line-of-sight from Cassini to the star; (2) the attenuation of the HSP signal, scaled by a factor of 300; and
(3) the projections of the 8 jets seen by the ISS instrument6 into the plane of the figure. The jets have each, for purposes of illustration, been assigned a length of 50 km. In the labels, the letters A, B, C, and D refer to the "tiger stripes" Alexandria, Baghdad, Cairo, and Damascus, respectively, and the original Roman numerals have been replaced by Arabic. The label C/A marks the closest approach of the lineof-sight to Enceladus. The times and positions at which the line-of-sight intersected the centerlines of the jets are marked by squares. Jet B7 was intersected 35 km from its source on
Enceladus' surface; the corresponding distances for jets B6 and C8 were within 18 +- 1 km, and for the others, within 23 +- 2 km. Other things (such as jet strength) being equal, the width of the attenuation feature associated with each jet should be proportional, and the magnitude inversely proportional, to this distance.
<date>

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Published this quarter
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In Press ( Went into press May-Jul and also includes still in press from earlier quarters )
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Submitted ( Submitted May-Jul and also includes submitted earlier and still in review ) 6
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Published 2008 to date:
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Published Entire mission
2
9
2
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2 papers at AGU Joint Assembly in Ft. Lauderdale, FL, May, 2008 (Colwell, Bradley)
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4 papers at the COSPAR in Montreal, July 2008 (Colwell, Esposito, Hansen, Pryor)
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1 paper at The Science of Solar System Ices workshop in Oxnard, CA, May 2008 (Hendrix)
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5 papers at Saturn After Cassini/Huygens workshop in London, July 2008 (Albers, Bradley, Colwell,
Esposito, Hendrix & Hansen)
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1 paper at Ring Workshop in Paris, France, July 2008
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2 papers at EGU in Vienna Austria, April 2008
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4: public talks
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0: press releases
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0: press conferences
69
Quarterly
3 <date>

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Science Plans (Aug - Oct 2008)
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Scientific organizer for Cassini Rings Workshop to be held in Paris France, July 24-25, 2008 (Colwell)
– Analysis of sharp edges in Saturn’s rings using multiple stellar occultation profiles. (Colwell)
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Finish HDAC analysis and find best fitting model parameters to learn something about atomic hydrogen in Titans exosphere
(Hedelt)
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Close Enceladus flyby in August
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Publications (Aug - Oct 2008)
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In preparation (includes all papers submitted up to now, but not yet published) 9
• 1 paper to Nature
• 1 paper to Icarus
• 1 paper to Astrophys. J. Suppl.
• 1 paper to GRL
• 1 paper submitted to JGR
• 1 paper submitted to Rev. Geophys
• 1 paper submitted to Origin of Life and Evolution of Biospheres
• 1 paper submitted to Astronomy and Astrophysics
• 1 paper submited to Scholarpedia
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Upcoming presentations at scientific meetings (Aug - Oct 2008)
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4 papers at European Planetary Science Conference in Muenster Germany, September 2008. (Colwell, Hedelt, Esposito, Hansen)
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3 papers at DPS in Ithaca New York, October 2008. (Colwell, Albers, Hansen)
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Public Outreach and Press Activities (Aug - Oct 2008)
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0: public talks
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0: press releases
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0: press conferences
Quarterly
4 <date>

Quarterly
5 <date>

• Aguilar, A., J.M, Ajello, R.S. Mangina, G.K. James, H. Abgrall, E. Roueff. 2008. The Electron Excited Middle UV to Near IR Spectrum of H
2
: Cross sections and Transition Probabilities. ApJ. Supp . (Published July 1, 2008)
• Ajello J.M., A. Aguilar, R. S. Mangina, G. K. James, P.Geissler, L. Trafton. 2008. The Middle UV to Near IR
Spectrum of Electron Excited SO
2
. JGR-Planets . (Published March 21, 2008)
•
Ajello, J , J. Gustin, A.I.F. Stewart, K. Larsen, L.W. Esposito, W. Pryor, W. McClintock, M. H. Stevens, C.P. Malone and D. Dziczek. 2008. Titan airglow spectra from the Cassini Ultraviolet Imaging Spectrograph: FUV disk analysis.
Geophys. Res. Lett . 35, L06102, doi:10.1029/2007GL032315. (Published 3/21/08)
•
Esposito, L.W., B. K. Meinke, J.E. Colwell, P.D. Nicholson, M.M. Hedman. 2008. Moonlets and Clumps in
Saturn’s F Ring. Icarus (Published March 2008)
•
Hendrix , A.R., C.J. Hansen. 2008. Ultraviolet Observations of Phoebe from Cassini UVIS. Icarus . (Published Feb.
7, 2008)
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Hendrix , A.R., Hansen, C.J.. 2008 The Albedo Dichotomy of Iapetus Measured at UV wavelengths. Icarus .
(Published Feb. 7, 2008)
•
Jones, G. H., E. Roussos, N. Krupp, U. Beckmann, A. J. Coates, F. Crary, I. Dandouras, V. Kikarev, M. K.
Dougerty, P. Garnier, C. J. Hansen, A. R. Hendrix , G. B. Hospodarsky, R. E. Johnson, S. Kempf, K. K. Khurana,
S. M. Krimigis, H. Krueger, W. S. Kurth, A. Lagg, H. J. McAndrews, D. G. Mitchell, C. Paranicas, F. Postberg, C. T.
Russell, J. Saur, M. Seiss, F. Spahn, R. Srama, D. F. Strobel, R. Tokar, J.-E. Wahlund, R. J. Wilson, J. Woch, D.
Young. 2008. The Dust Halo of Saturn’s Largest Icy Moon, Rhea. Science . 319. no. 5868, pp. 1380 - 1384. doi:
10.1126/science.1151524. (published March 7, 2008)
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Liu, X., D.E. Shemansky, C.P. Malone, P.V. Johnson, J.M. Ajello, I. Kanik, A.N. Heays, B.R. Lewis, S.T. Gibson and G. Stark. 2008. Experimental and coupled-channels investigation of the radiative properties of the N 1 Σ– X 1 Σ
2 band system. JGR . (Published Feb. 2008)
•
Parkinson , C.D., M-C. Liang, Y. L. Yung, J. L. Kirschivnk. 2008.. 2008. “Habitability of Enceladus: Planetary
Conditions for Life”.
Origin of Life and Planetary Evolution . (As of 7/1, should be published any day)
Quarterly
6 <date>

• Andre , N., M. Blanc, S. Maurice, P. Schippers, E. Pallier, T. I. Gombosi, K. C. Hansen, D. T. Young, F. J. Crary, S.
Bolton, E. C. Sittler, H. T. Smith, R. E. Johnson, R. A Baragiola, A. J. Coates, A. M. Rymer, M. K. Dougherty, N.
Achilleos, C. S. Arridge, S. M. Krimigis, D. G. Mitchell, N. Krupp, D. C. Hamilton, I. Dandouras, D. A. Gurnett, W.
S. Kurth, P. Louarn, R. Srama, S. Kempf, J. H. Waite, L. W. Esposito, J. T. Clarke. 2008. Magnetospheric Regions and Associated Plasma Processes: Synopsis of Cassini Observations During Orbit Insertion. Rev. Geophys .
(Submitted July 2007. Accepted June 2008.)
• Pryor, W., P. Gangopadhyay, B. Sandel, T. Forrester, E. Quemerais, E. Moebius, L. Esposito, I. Stewart, B.
McClintock, A. Jouchoux, J. Colwell, V. Izmodenov, Y. Malama, K. Tobiska, D. Shemansky, J. Ajello, C.Hansen, M.
Bzowski and P. Frisch. 2008. Radiation transport of heliospheric Lyman-alpha from combined Cassini and
Voyager data sets. Astronomy and Astrophysics . (Submitted October 16, 2007, went into press as of June 5,
2008)
Quarterly
7 <date>

•
Colwell, J.
E., Cooney, J. H., Esposito, L. W., Sremcevic, M. 2008. Density Waves in Cassini UVIS Stellar
Occultatios 1. The Cassini Division. Icarus . (Submitted June 6, 2008).
•
Glass-Maujean , M., X. Liu and D. E. Shemansky, Analysis of Electron-Impact Excitation and Emission of the npσ 1S and npπ 1Πu Rydberg Series of H2, Astrophys J. Suppl . Ser., (Submitted on April 14, 2008)
•
Hansen, C. J ., Esposito, L.W., Stewart, A.I.F., Meinke, B., Wallis, B., Colwell, J., Hendrix, A.R., Larsen, K., Pryor,
W., Tian, F.. 2008. Water Vapor Jets in Enceladus’ Plume. Nature . (Submitted June 3, 2008.)
•
Howard, J.E
. 2008. "Stability of Hamiltonian Flows" Scholarpedia.
(Submitted in October.) No printed copy, just online.
•
Larsen, K.
, J.Ajello, J. Gustin, and A.I.F. Stewart. 2008. “Variability in Titan's Nitrogen Emissions” GRL (to be submitted in July)
•
Liu, X ., A. Heays, D. E. Shemansky, B. R. Lewis and P. D. Feldman, Analysis of terrestrial-thermospheric N2 c
1S(0)~b’1S(1) - X 1S dayglow emission observed by the Far Ultraviolet Spectroscopic Explorer, J. Geophys.
Res ., (Submitted May 12, 2008)
Quarterly
8 <date>

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AGU Joint Assembly in Ft. Lauderdale, FL, May, 2008
• Colwell, J. E., Esposito, L. W., Cooney, J. H., Jerousek, R. G., Lissauer, J. J., Stewart, G. R., Sremcevic, M.: Mass and
Thickness of the Cassini Division in Saturn’s Rings .
• Bradley: Composition and size properties of Saturn's rings determined from ultraviolet measurements made by the Cassini
Ultraviolet Imaging Spectrograph
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COSPAR in Montreal, July 2008
• Colwell: Vertical Structure of Saturn's Rings from Cassini UVIS Stellar Occultations, Colwell, J. E., Esposito, L. W., Jerousek,
R., Lissauer, J. J.
• Esposito: Structure and history of Saturn’s rings from Cassini-UVIS Observations
• Hansen: Exploration of a New World: Saturn's moon Titan
• Pryor: Lyman-alpha observations of Comet Holmes from SORCE SOLSTICE and SOHO SWAN , W. Pryor, M. Snow, and E.
Quemerais. (re: cross-calibrating UV instruments)
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The Science of Solar System Ices workshop in Oxnard, CA, May 2008
• Hendrix and Hansen: UV Spectra of the Icy Moons of Jupiter and Saturn.
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Saturn After Cassini/Huygens workshop in London, July 2008
• Albers, N., Sremcevic, M., Esposito, L.W.: Saturn’s F ring: Observations by Cassini UVIS
• Bradley: Composition and size properties of Saturn's rings determined from ultraviolet measurements made by the Cassini
Ultraviolet Imaging Spectrograph
• Colwell : Ring Structure , Colwell, J. E., French, R. G., Marouf, E. A., Murray, C. D., Nicholson, P. D., Tiscareno, M. S.
• Esposito : Structure and history of Saturn’s rings from Cassini-UVIS Observation
• Hendrix and Hansen: Ultraviolet Spectroscopy of the Surfaces of the Saturnian Satellites
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Ring Workshop, July 2008, Paris, France
• Albers.: F ring models
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EGU, April 2008, Vienna Austria
• Yung: Evolution andOrigin of Titan ﾕ s Atmosphere
• Yung: Habitability of Enceladus:Planetary Conditions for Life
Quarterly
9 <date>

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None
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None
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Esposito : History of Saturn’s Rings, Ball Aerospace, June 27
– Esposito: History of Saturn’s Rings, Oulu University, Finland, May 16
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Liu: Experimental and coupled-channels investigations of N2 radiative properties for analysis of FUSE day glow observation, Caltech graduate students. June 10.
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Hansen: The Discovery of Enceladus’ Water Vapor Plume , California Institute of Technology Alumni Seminar,
May, 2008, Pasadena, CA
Quarterly
10 <date>