NASA Quarterly
UVIS
Q2 - 2012
(Feb - Apr 2012)
Quarterly
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UVIS: Science Highlight
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UVIS: Science Highlights
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In Bonnie Meinke's thesis, she is able to match the size distribution of 'kittens' in
Saturn's F ring with a model that increases accretion where Prometheus causes ring
particle streamlines to crowd.
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UVIS: Accomplishments
• Science Highlights (from this quarter: Feb-Apr 2012)
– Bradley designed a prime UVIS spectroscopic observation for FUV ring science. The observation is Rev 173
during October, 2012 and the first portion of the observation is designed to provide a measurement of off
axis light from the dayside of Saturn to characterize the background for subtraction from rings observations.
The second portion of the observation will consist of pointing the field of view radially from the C through the
A ring behind the terminator of the planet, which will result in minimizing unwanted Saturn shine on the
rings. The pixel size projected in the ring plane is ~ 1000 km. The field of view will move inward by ~ 333 km
twice during the observation to maximize spatial sampling for this geometry.
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Bradley generated several hundred data cubes for Titan observations to be used by team member Joe
Ajello for Titan atmospheric investigations. Both FUV and EUV data cubes were created that included
calibrated data and geometrical variables.
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UVIS: Accomplishments
• Publications
– Published this quarter
– In press (Went into press Feb - Apr ‘12 and also includes still in press from earlier quarters)
– Submitted (Submitted Feb - Apr ‘12 and also includes submitted earlier and still in review)
– Published 2012 to date (since Nov. 2011)
– Published entire mission
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• Presentations at scientific conferences (Feb - Apr 2012)
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2 papers at LPSC, The Woodlands, TX, March 2012 (Hendrix, Esposito)
1 paper at MAPS Workshop, Cologne, March, 2012 (Radioti)
1 paper at Titan Through Time 2, Greenbelt, MD, April, 2012 (Yung)
1 paper at EGU, Vienna, Austria, April, 2012 (Esposito)
• Public Outreach and Press Activities (Feb - Apr 2012)
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1: public talk
0 : press release
1: press conferences (phone interviews)
• Awards (Feb - Apr 2012)
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At the EGU awarded the Arne Richter Award for Outstanding Young Scientists to Aikaterini Radioti for her
remarkable work in the field of auroral dynamics of Jupiter and Saturn, to which she contributed with original
ideas based on combined studies of remote auroral and in‐situ magnetospheric data.
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Miodrag Sremcevic has been awarded a three-year grant for research on"Saturn's B ring objects" in Cassini
UVIS and ISS data.
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UVIS: Plans
– Science Plans (May-Jul 2012)
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Miodrag Sremcevic has been awarded a three-year grant for research on"Saturn's B ring objects" in Cassini UVIS and
ISS data. The proposal will examine appearance and evolution of propeller-like objects withinthe Saturn's B ring. The
grant will be funded by the NASA ROSES-2011Cassini Data Analysis and Participating Scientist Program ($190k). Spring
2012.
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Bradley: Compare Saturn ring spectra with Saturn icy moon spectra
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Bradley: Finish off paper for submission that deals with spectral albedo properties of Saturn’s rings
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Bradley: Continue investigation of ring particle albedo in the FUV
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Colwell: Write paper on occultation statistics
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Colwell: Write paper on updated self-gravity wakes model and fit to data
– Publications (May-Jul 2012) In preparation (includes submitted, but not yet published)
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1 paper in review in an AGU monograph on the auroras
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1 paper in review at ApJL
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1 paper in review at Astrophys J
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3 papers in review in Icarus
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1 papers in review at JGR
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1 chapter in press in the book Titan: Surface, Atmosphere and Magnetosphere
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– Upcoming presentations at scientific conferences (May-Jul 2012)
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1 paper at Europlanet workshop in Santorini, May, 2012 (Radioti)
– Public Outreach and Press Activities (May-Jul 2012)
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0: public talk
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0: press releases
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0: press conference (phone interview)
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Backup Material
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UVIS: Publications - 2012
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Albers, N, M. Sremcevic, J.E. Colwell, and L.W. Esposito. 2012. Saturn’s F Ring as seen by Cassini UVIS:
Kinematics and Statistics. Icarus. Volume 217, p. 367-388, doi:10.1016/j.icarus.2011.11.016. (Published January
2012.)
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Esposito, L.S., N. Albers, B. K. Meinke, M. Sremcevic, Pr. Madhusudhanan, J. Colwell, R. G. Jerousek. 2012. A
Predator-Prey Model for Moon-triggered Clumping in Saturn’s Rings. Icarus. 217, 1, 103-114. (Published Jan
2012)
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Liu, X., D. E. Shemansky, P. V. Johnson, C. P. Malone, M.A. Khakoo and I. Kanik. 2012, Electron and photon
dissociation cross sections of H2 singlet-ungerade continua, J. Phys. B. 45 015201 doi:10.1088/09534075/45/1/015201. (Published January 2012)
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Meinke, B.K., L. W Esposito, N. Albers, M. Sremcevic. 2012. Classification of F ring features observed in Cassini
UVIS occultations. Icarus, 218, 1, p.545-554, doi:10.1016/j.icarus.2011.12.020 (Available online 19 January 2012,
in print March 1, 2012)
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UVIS: Publications UPDATE
The following papers were published between 2010-2011, however we did not know in time to
include in previous quarterly reports.
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Ajello, J.M, R. S. Mangina, D. J. Strickland, D. Dziczek. 2011. Laboratory studies of UV emissions from proton
impact on N2: The Lyman-Birge-Hopfield Band System for aurora analysis. JGR. VOL. 116, A00K03, 21 PP., 2011.
doi:10.1029/2010JA016103 (published April 19, 2011)
• Baillie, K., J. E. Colwell, J. J. Lissauer, L. W. Esposito, M. Sremcevic 2011. Waves in Cassini UVIS Stellar
Occultations 2. Waves in the C Ring. Icarus. 216, 1, 292–308. doi: 10.1016/j.icarus.2011.05.019. (Published
November 2011)
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Gerard, J.-C., J. Gustin, B, Hubert, G.R. Gladstone and L.W. Esposito. 2011. Measurements of the Helium 584‐Å
airglow during the Cassini flyby of Venus. Planetary Space Sci. 59, 13, 1524–1528. (Published October 2011)
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Hendrix, A.R. and C. J. Hansen. 2010. The Surface Composition of Enceladus: Clues from the Ultraviolet.
Proceedings book of the IAU Symposium 263. Volume 5, pp 126-130, Symposium S263. DOI:
10.1017/S1743921310001626, DOI: 10.1017/S1743921310001626 (Published online only: 06 Apr 2010)
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Jerousek, R. G., Colwell, J. E., Esposito, L. W. 2011. Morphology and Variability of Sharp Edges in Saturn's Rings.
Icarus. 216, 1, Pages 280–291. (Published November 2011).
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Radioti, A., D. Grodent, J.-C. Gerard, S. E. Milan, B. Bonfond, J. Gustin, and W. Pryor, 2011, Bifurcations of the
main auroral ring at Saturn: ionospheric signatures of consecutive reconnection events at the magnetopause. JGR.
116, A11209, 8 PP, doi:10.1029/2011JA016661. (Published November 10, 2011)
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UVIS: Publications (In Press)
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West, R., P. Lavvas, C. Anderson, and H. Imanaka. 2012. Titan Haze. A chapter in Titan: Surface, Atmosphere and
Magnetosphere. Eds. I. Mueller-Wodarg, C. Griffith, T. Cravens and E. Lellouch . Cambridge University Press
[Cambridge Planetary Science Series]. (In press March 1, 2012)
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UVIS: Publications (Submitted)
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Guimaraes, A.H.F., Spahn, F., Seiss, M., Albers, N., Vieira-Neto, E., Brilliantov, N.V. 2011. Aggregates in Saturn's
rings under strength regime. Icarus (Submitted December 23, 2011)
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Gurnett, D. and W. Pryor. 2012. Auroral Processes Associated with Saturn's Moon Enceladus. For inclusion in an
AGU monograph on the auroras. (Submitted November 2011)
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Hendrix, A. R., T. A. Cassidy, C. Paranicas, C. J. Hansen 2011. The Albedo Pattern of Mimas as measured by
Cassini UVIS. Icarus. (Submitted August 2011).
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Hubert, B. ., J.-C. Gerard, J. Gustin, D.V. Bisikalo, V.I. Shematovich and R.G. Gladstone. 2012. Cassini-UVIS
observation of dayglow FUV emissions of carbon in the thermosphere of Venus. Icarus. (Submitted in December
2011 per Gustin 3/29/30, so didn’t know in time for Q1 report).
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Jackman, C.M., N. Achilleos, S.W.H. Cowley, E.J. Bunce, A. Radioti, D. Grodent, S.V. Badman, M.K. Dougherty,
W. Pryor. 2012. Auroral counterpart of magnetic field dipolarizations in Saturn’s tail. JGR. (submitted February,
2012)
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Kammer, J. A., X. Zhang, M.-C. Liang, D. E. Shemansky and Y. L. Yung. 2011. Observations and Modeling of
Hydrocarbons and Tholin in the Upper Atmosphere of Titan. ApJL. (Submitted Sep 27 2011)
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Liang, M. C., A. S. Wong, D. Henze, M. Adamkovics, K. Boering and Y. L. Yung. (2011). Synergistic study of
hydrocarbon photochemistry in the laboratory and the atmosphere of Titan, Astrophys. J. (In Revision.)
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UVIS: Theses Completed
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Bonnie Meinke, 2012 Observations and Models of Accretion in Saturn’s F Ring,
February 14 PhD Defense
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UVIS: Science Presentations - Q2-2012 (Feb-Apr 2012)
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LPSC, The Woodlands, TX, March 19-23, 2012
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Esposito, L.W.: A Season in Saturn’s Rings: Cycling, Recycling and Ring History
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Hendrix, A.R.: Multi-wavelength Photometry of the Icy Saturnian Moons
Cassini/MAPS Workshop 2012, Cologne, March 28th - 30th, 2012
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Titan Through Time 2, NASA/GSFC Greenbelt, MD, April 3-5, 2012
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Radioti A: Recent auroral discoveries with UVIS: bifurcations, small-scale structures and equatoward
transient features
Yung: Nitrogen Chemistry in Titan’s Upper Atmosphere
EGU, Vienna Austria, April 22-28, 2012
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Esposito, L.W.: A season in Saturn’s rings: Cycling, recycling and ring history
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UVIS: Outreach - Q2-2012 (Feb-Apr 2012)
• #: EPO: Talks to school children, teachers and public
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Larry Esposito: Saturn’s Rings: A Post-Equinox View, SETI Institute, Mountain View, CA , March 14, 2012.
• #: Press releases
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None this quarter
• #: Press conferences & interviews
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Esposito: Saturn’s F Ring, “New Scientist”, via phone, March 14, 2012.
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