NASA Quarterly UVIS

1. NASA QuarterlyUVIS Q1 - 2013 (Nov 2012– Jan 2013)

2. UVIS: Science Highlights

3. UVIS: Accomplishments Science Highlights (from this quarter: Nov 2012 – Jan 2013) Haloes in Saturn’s rings can be explained by the same dynamics that creates straw in the strongest density waves. A “Predator-Prey” model of moon-triggered clumping gives higher velocity for collisions, which can remove ring-particle regolith, depositing this brighter material in a “halo” around the wave.

4. UVIS: Accomplishments • Publications • Published this quarter1 • In press (Went into press Nov 2012-Jan 2013, also includes still in press from earlier quarters) 4 • Submitted (Submitted Nov 2012-Jan 2013, also includes submitted earlier and still in review) 7 • Published 2013 to date (since Nov. 2012) 1 • Published entire mission 154 • Presentations at scientific conferences (Nov 2012 – Jan 2013) • 13 presentations at the AGU in San Francisco, December 3-7, 2012 (Baillie, Becker, Bradley, Colwell (2), Dove, Esposito, Gustin, Hansen, Lavvas, Meinke, West, Yung) • Public Outreach and Press Activities (Nov 2012 – Jan 2013) • 0: public talks • 2 : press releases • 0: press conferences (phone interviews)

5. UVIS: Plans • Science Plans (Feb – Apr 2013) • Bradley: Continue investigation of ring particle albedo • Bradley: Compare Saturn ring spectra with Saturn icy moon spectra • Colwell: Paper on faint and narrow rings is in production (student Bryce Bolin is lead author). • Colwell: Paper on occultation statistics is in production (Colwell lead author). • Colwell: New paper on self-gravity wakes is in preparation (Colwell or Jerousek lead author). • Colwell: Submit new and updated occultation data sets to the Planetary Data System. • Colwell: Paper on analysis of Rev 9 solar occ diffraction signal from F ring is in preparation (student Becker is lead author). • Publications(Feb – Apr 2013)In preparation (includes submitted, but not yet published) 11 • 1 paper in press in an AGU monograph on the auroras • 1 paper in review in Astron. J • 1 paper in review in GRL • 1 paper in review, 2 papers in press in Icarus • 1 paper in review in JGR • 1 paper in review in J. Mol. Spectrosc. • 2 papers in review in Planet. Space Sci. • 1 chapter in press in the book Titan: Surface, Atmosphere and Magnetosphere

6. UVIS: Plans Continued from last page • Upcoming presentations at scientific conferences (Feb – Apr 2013) • 1+ presentations at LPSC, The Woodlands, Texas, March 18-22, 2013 (Esposito) • 1+ presentations at EGU, Vienna, Austria, April 7-12, 2013 (Esposito) • Public Outreach and Press Activities (Feb – Apr 2013) • 0: public talk • 0: press releases • 0: press conference (phone interview)

7. Backup Material

8. UVIS: Publications - 2013 • Ajello, J.M, West, R.A., J. Gustin, K. Larsen, A.I.F. Stewart, L.W. Esposito, W.E. McClintock, G.M. Holsclaw, E.T. Bradley. 2012. Cassini UVIS Observations of Titan Nightglow Spectra. JGR. VOL. 117, A12315, doi:10.1029/2012JA017888. (Published 12/22/12) • Hubert, B. ., J.-C. Gérard, 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. Volume 220, Issue 2, p. 635-646, doi: 10.1016/j.icarus.2012.06.002 (Published August 2012. Didn’t know in time for previous report).

9. UVIS: Publications (In Press) • Gérard, J.C., Gustin, J., Pryor, W.R., Grodent, D., Bonfond, B., Radioti, A., Gladstone, R.G., Clarke, J.T., Nichols, J.D., 2012. Remote sensing of the energy of auroral electrons in Saturn’s atmosphere: Hubble and Cassini spectral observations. Icarus. (Accepted Dec. 2012.) • Gurnett, D. and W. Pryor. 2012. Auroral Processes Associated with Saturn's Moon Enceladus. For inclusion in an AGU monograph on the auroras. (Accepted spring 2012) • Hendrix, A. R., T. A. Cassidy, B.J. Buratti, C. Paranicas, C. J. Hansen, B.D. Teolis, E. Roussos, P.Kollmann, T. Bradley, R. Johnson. 2012. Mimas’ Far-UV Albedo: Spatial Variations. Icarus. (Accepted June 2012) • 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]. (Accepted March 1, 2012)

10. UVIS: Publications (Submitted) • Baillié, K., Colwell, J. E., Esposito, L. W. 2012. Meter-sized moonlet population in Saturn’s C ring and Cassini Division. Astron. J. (Submitted July 2012) • Bradley, E.T., J.E. Colwell, L.W. Esposito, 2012. Scattering properties of Saturn’s rings from Cassini UVIS spectra. Icarus. (Submitted August 2012) • Carbary, J., D. Mitchell, and W. Pryor. 2012. Correlation of Saturn's Ultraviolet Aurora with Energetic Neutral Atoms. GRL.  (Submitted June 28, 2012) • Cheng L., Zhang, X., Kammer, J.A., Liang, M-C., Yung, Y.L. 2013. Eddy Diffusion Profile of Titan's Atmosphere Revealed by Cassini Observations. Planet. Space Sci. (Submitted Nov. 2012) • Gustin, J. , Gerard, J.C., Grodent, D., Gladstone, G.R., Clarke, J.T., Pryor, W.R., Dols, V., Ajello, J.M. 2012. Effects of methane on giant planet's UV emissions and implications for the auroral characteristics. J. Mol. Spectrosc.. (Submitted Dec. 2012) • 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) • Kammer, J.A., Shemansky, D.E., Zhang, X., Yung, Y.L. 2013. Composition of Titan's Upper Atmosphere from Cassini UVIS EUV Stellar Occultations. Planet. Space Sci. (Submitted Nov. 2012.)

11. UVIS: Science Presentations – Q3-2012 (Aug-Oct 2012) • AGU, San Francisco, December 3-7 • Baillié: “Small Propeller Signatures in the C Ring and Cassini Division” • Becker: “The Population of Small Particles in Saturn’s Rings from Diffraction in Stellar Occultations” • Bradley: “Constraining Small Scale Compositional Variations in Saturn’s Rings Through Analysis of Cassini UVIS Far Ultraviolet Reflectance Spectra” • Colwell: “Variations in Self-Gravity Wake Structures Across Saturn’s Rings” • Dove: “Low-Velocity Aggregate Collisions Simulating Planetary Ring Dynamics” • Esposito: “Haloes seen in UVIS reflectance” • Gustin: “Saturn temperature profiles at low, medium and high latitudes derived from UVIS EUV Solar occultations” • Hansen: “Deriving the Structure and Composition of Enceladus’ Plume from Cassini Occultation Observations” • Hicks (Yung): “A Termolecular Reaction Mechanism for Nitrogen Incorporation in Aerosol Produced by Far UV Irradiation of CH4-N2 Atmospheres “ • Lavvas: “Aerosol growth in Titan's ionosphere • Meinke: "Accretion in Saturn's F Ring" • Spilker (Colwell): “Studies of Saturn’s rings from UV to far IR: Constraints on ring particle properties and ring structure” • West: “Airglow on Titan During Eclipse”

12. UVIS: Outreach – Q1-2013 (Nov 2012 – Jan 2013) • EPO: Talks to school children, teachers and public • Hansen: “Exploring Saturn with the Cassini mission”, Junior ROTC at Dixie High School (3 sessions), St. George UT, Dec. 7, 2012 • Bradley: “Making a ring particle” Kimball Wiles Elementary School (50 4th grade students), Gainesville, Florida; December 17, 2013 • Esposito: “Applied Mathematics Dynamics” University of Colorado, Boulder, CO (Public Seminar), November 14, 2012 • Press releases • Esposito: Article in Cosmos magazine, “Snowshoe hares and Saturn's rings”, October 24, 2012. • Esposito: Feature story about 15th anniversary of Cassini launch, interview with Hank Lacey, freelance science writer for Denver area media, October 16 2012. • Press conferences & interviews • None this quarter