NASA Quarterly
UVIS
Q2 - 2008
(Feb. - Apr. 2008)
Quarterly
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UVIS: Accomplishments
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Science Highlights
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Enceladus flyby March 12 2008
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Quarterly
Obtained UV spectra of north and solar polar regions
Continued analysis of the Enceladus occultation data from October 24 (admittedly last quarter, but we didn’t get the reconstructed
trajectory until this quarter), and the Rev 61 Enceladus flyby on March 12
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UVIS: Science Highlights
Quarterly
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Streams of high-density gas detected by Cassini’s
Ultraviolet Imaging Spectromer (UVIS) on
Saturn’s moon Enceladus match the locations of
dust jets determined from Cassini images, labeled
here with Roman numerals. The spectrograph
pinpointed the locations of individual gas streams
in the plume in a ‘stellar occultation’ which
involves measuring the light of a star, (in this case,
zeta Orionis), as it passed behind the plume from
Cassini’s viewpoint.
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The blue line in this projection shows the path of
the starlight through the plume,over the south polar
region of Enceladus. The instrument looked at the
star across this path in the direction indicated by
the short blue lines.
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Some of the dust jets appear to merge together in
UVIS stellar occultation data. The dimming of
starlight labeled “a” was caused by dust jets V and
VII. The dimming of starlight marked as feature
“b” is probably off-set too far to be associated with
dust jet I, because the jet is not perfectly vertical.
Dimming of starlight labeled “c” corresponds to
dust jet VI, and “d” is dust jet III, with dust jet II in
between. The individual jets come from sources
with an area of less than 300 by 300 meters (1,000
feet square) – about the size of half a tennis court -probably stretched out rectangularly along the tiger
stripes. The new UVIS data indicate that the water
molecules are blasting off from Enceladus at faster
than 600 meters per second (about 1,300 miles per
hour.
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UVIS: Accomplishments
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Publications
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Published this quarter
6
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In Press (Went into press Feb-Apr and also includes still in press from earlier quarters)
2
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Submitted (Submitted Feb-Apr and also includes submitted earlier and still in review)
4
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Published 2008 to date:
8
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Published Entire mission
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Presentations at scientific meetings
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2: EGU, 13-18 April, Vienna
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2: LPSC, March 2008, Houston, Texas
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1: Second Titan Workshop, March 24-26 , Miami, Fl
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1: Astrobiology Science Conference, April 14 - 17, Santa Clara, CA
Public Outreach and Press Activities
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1: Press release
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1: Press conference
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9: Public Lectures
Quarterly
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UVIS: Plans
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Science Plans (May - Jul 2008)
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Publications (May - Jul 2008)
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Plans for Enceladus flybys in August and October 2008
In preparation (includes all papers submitted up to now, but not yet published)
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1 paper submitted to APJ.
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1 paper submitted to JGR-Planets
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1 paper submitted to Rev. Geophys
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1 paper submitted to Origin of Life and Evolution of Biospheres
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1 paper submitted to Astronomy and Astrophysics.
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1 paper submited to Scholarpedia.
6
Upcoming presentations at scientific meetings (May - Jul 2008)
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2 papers at AGU Joint Assembly in Ft. Lauderdale, FL, May, 2008 (Colwell, Esposito)
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1 paper at the COSPAR in Montreal, July 2008 (Colwell)
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2 paper at The Science of Solar System Ices workshop in Oxnard, CA, May 2008 (Hendrix)
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6 papers at Saturn After Cassini/Huygens workshop in London, July 2008 (Hendrix, Ohtsuki, Albers, Sremcevic, Esposito,
Colwell)
Public Outreach and Press Activities (May - Jul 2008)
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1: public talk - Esposito, Ball Aerospace, “History of Saturn’s Rings“, June 27
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0: press releases
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0: press conferences
Quarterly
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Backup Material
Quarterly
6
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UVIS: Publications - 2008
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Ajello, J. M., M. H. Stevens, A. I. F. Stewart, K. Larsen, L. W. Esposito, J.E. Colwell, W. E. McClintock, G.
Holsclaw, J. Gustin, W. R. Pryor. 2007. Titan Airglow Spectra from Cassini UVIS: I. EUV Analysis. Geophys.
Res. Lett. 34, L24204, doi:10.1029/2007GL031555. (Published December 25, 2007)
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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)
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Brilliantov, N., N. Albers, F. Spahn, and T. Poeschel. 2007 "Collision dynamics of granular particles with
adhesion" Physical Review E. 76, 051302-1. LASP Reprint #1098. (Published Nov. 7, 2007)
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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)
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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)
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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. (2008)
(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 N2 1Σ–X 1Σ band system. JGR. (Published Feb. 2008)
Quarterly
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UVIS: Publications (In Press)
Quarterly
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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 H2: Cross sections and Transition Probabilities. ApJ. Supp.
(Submitted March 2007, accepted February 2008, will be published in July 2008)
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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 SO2. JGR-Planets. (Submitted March, 2007, accepted Feb. 2008, in
press for March or April)
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UVIS: Publications (Submitted)
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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.)
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Parkinson, C. D., A. C. Barr, M. C. Liang and Y. L. Yung. 2008. “Habitability of Enceladus: Planetary Conditions for
Life”. Origin of Life and Evolution of Biospheres. (Submitted 8/15/07)
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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)
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Howard, J.E. 2008. "Stability of Hamiltonian Flows" Scholarpedia. (Submitted in October.) No printed copy, just
online.
Quarterly
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UVIS: Science Presentations - 2008
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EGU, Vienna, 13-18 April 2008
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Albers: "Saturn's F Ring: Simulations and Observations by Cassini UVIS” Poster
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Esposito: “ History of Saturn’s Rings “
LPSC, March 2008, Houston, Texas
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C. Hansen, L. Esposito, J. Colwell, A. Hendrix, B. Meinke, I. Stewart: New Occultation Observation of Enceladus’ Plume
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A.Hendrix and C. Hansen: Iapetus: New Results from Cassini UVIS
Second Titan Workshop, Miami, March 24-26, FL, USA
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Yung: with Liang, M. C., Henze, D., Gurwell, M. A. Laboratoryhydrocarbonkinetics, isotopic fractionation, and the evolution of Titan’s
atmosphere.
Astrobiology Science Conference April 14 - 17 2008, Santa Clara Convention Center, CA
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Quarterly
Yung: with Parkinson, C. D., M.-C. Liang, J. L. Kirschvink.Habitability at Enceladus: Planetary Conditions for Life
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UVIS: Outreach - 2008
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#: Press releases
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#: Press conferences & interviews
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Esposito: “Cassini Tastes Organic Material at Saturn's Geyser Moon“, Related to March 26 Press Conf. at NASA
Esposito: “New Details From Close Flyby of Saturn Moon Enceladus“, News Briefing at NASA Headquarters, March 26, 2008
#: EPO: Talks to school children, teachers and public
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Colwell: "Running Rings Around Saturn" Talk to about 30 students at Stetson University, February 19
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Esposito: “History of Saturn’s Rings“ 1 at LASP Feb. 4, and three at JPL, March 17, 18 & 19, both public and technical)
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Esposito: “History of Saturn’s Rings“, Earth & Space Sciences Seminar Series, Von Karman Auditorium, JPL March 17-19
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Esposito: “History of Saturn’s Rings“ public lecture at University of New Mexico, April 4
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Larsen: “Cassini results in Saturn Orbit“ at Starfest in Denver, April 18
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Hendrix: “Enceladus: The Newest Wrinkle from Cassini’s Tiger-Striped Moon“, Von Karman Lecture Series, Pasadena, CA, March 2021.
Quarterly
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