NASA Quarterly
UVIS
Q3 - 2012
(May- Jul 2012)
Quarterly
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UVIS: Science Highlights
UVIS Eclipse Observations
Nightside emissions are observed from Titan on only one of three eclipses. At that time the pixel scale was 660
km/pixel (not resolving the emitting region of the limb). 19 June 2012, R. West. [From Ajello et al. 2012]
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UVIS: Accomplishments
Science Highlights (from this quarter: May – Jul 2012)
•EUV and FUV emissions from N and N2 were observed at one of three eclipse events.
•Only the strongest emissions were observed, relative to what is seen from the illuminated atmosphere.
•In the one event where emissions are observed the emitted intensities are about 0.1 times those seen on the
dayside.
•The two events where no emissions were observed are more distant and therefore the non-detection may be a result
of the smaller angle subtended by the emitting region. Examination of spectra at smaller distances would be a logical
next step.
•About half of the 42.6±1.2 R of H Ly-αemission could be produced by reflection of the IPM Ly-α. The remainder is
probably from proton recombination from precipitating protons.
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UVIS: Accomplishments
• Publications
– Published this quarter
– In press (Went into press May – Jul, 2012 and also includes still in press from earlier quarters)
– Submitted (Submitted May – Jul, 2012 and also includes submitted earlier and still in review)
– Published 2012 to date (since Nov. 2011)
– Published entire mission
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4
7
5
146
• Presentations at scientific conferences (May – Jul 2012)
–
3 papers at Europlanet workshop in Santorini, May 23-25, 2012 (Radioti, Gustin, Gerard)
• Public Outreach and Press Activities (May – Jul 2012)
–
–
–
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0: public talks
0 : press releases
1: press conferences (phone interviews)
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UVIS: Plans
– Science Plans (Aug – Oct 2012)
•
Bradley: Finish off paper for submission that deals with spectral albedo properties of Saturn’s Rings
•
Bradley: Continue investigation of ring particle albedo
•
Bradley: Compare Saturn ring spectra with Saturn icy moon spectra
•
Colwell: Write paper on faint and narrow ringlets in occultation data
•
Colwell: Write paper on analysis of occultation statistics
•
Colwell: Complete modeling of Rev 9 solar occultation
•
Colwell: Submit updated occultation profiles to the Planetary Data System
•
Colwell: Submit revised “Ghosts” paper (Baillié et al.) to Icarus
•
Colwell: Write paper on updated self-gravity wakes model and fit to data
– Publications (Aug – Oct 2012) In preparation (includes submitted, but not yet published)
•
1 paper in press in an AGU monograph on the auroras
•
1 paper in review in ApJL
•
1 paper in review in Astrophys J
•
2 papers in review in GRL
•
1 paper in review and 2 in press in Icarus
•
2 papers in review in JGR
•
1 chapter in press in the book Titan: Surface, Atmosphere and Magnetosphere
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Continued…
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UVIS: Plans
Continued from last page
–Upcoming presentations at scientific conferences (Aug – Oct 2012)
•
6 papers EPSC in Madrid, Spain, September 23-28, 2012 (Gerard, Gustin, Hendrix, Keller, Panayotis, Yung)
•
4+ papers at DPS in Reno, NV, October 14-19, 2012 (Colwell [several], Esposito, Keller, West)
–Public Outreach and Press Activities (Aug – Oct 2012)
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0: public talk
•
0: press releases
•
0: press conference (phone interview)
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Backup Material
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UVIS: Publications - 2012
•
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.)
•
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)
•
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)
•
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)
•
Zastrow, M, Clarke, J. T., Hendrix, A.R., Noll, K.S. 2012. UV spectrum of Enceladus. Icarus. 220: 29-35.
(Published May 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.
•
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)
•
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)
•
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)
•
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).
•
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)
•
Guimaraes, A.H.F., N. Albers, F. Spahn, M. Seiss, E. Vieira-Neto, N.V. Brilliantov. 2012. Aggregates in the
strength and gravity regime: Particle sizes in Saturn’s rings. Icarus (In press June 4, 2012)
•
Gurnett, D. and W. Pryor. 2012. Auroral Processes Associated with Saturn's Moon Enceladus. For inclusion in an
AGU monograph on the auroras. (In press 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. (In press 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]. (In press March 1, 2012)
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UVIS: Publications (Submitted)
•
Ajello, J.M, M.H. Stevens, 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. (Submitted May 1)
•
Carbary, J., D. Mitchell, and W. Pryor. 2012. Correlation of Saturn's Ultraviolet Aurora with Energetic Neutral
Atoms. GRL. (Submitted June 28, 2012)
•
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 but didn’t know in time for Q1 report).
•
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., 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)
•
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.)
•
West, R.A, J.M. Ajello, M. H. Stevens, D. F. Strobel, G. R. Gladstone, J.S. Evans, E.T. Bradley. 2012. Titan
Airglow During Eclipse. GRL. (Submitted May 10, 2012)
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UVIS: Science Presentations – Q3-2012 (May – Jul 2012)
–
–
Europlanet, Santorini, Italy, May 23-25, 2012
•
Radioti, A.: “Equatorward auroral features at Saturn: auroral signatures of injections”
•
Gustin, J.: “Temperature profiles at low, medium, high latitudes derived from UVIS EUV occultation”
•
Gerard, J-C.: “Results from the combined HST-Cassini campaign 2011: hydrocarbon absorption and auroral
electron energy”
•
Pryor, W.: “Cassini Auroral Science Planning”
•
Pryor, W.: “Saturn Auroral Night-Side Variability”
Rings-Icy Satellites Interactions workshop, Sardinia, June 15, 2012
•
Quarterly
Hendrix: “UVIS Observes Saturn's Icy Moons”
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UVIS: Outreach – Q3-2012 (May – Jul 2012)
• EPO: Talks to school children, teachers and public
–
None this quarter
• Press releases
–
None this quarter
• Press conferences & interviews
–
Esposito, L.W.: Phone interview with Sky & Telescope, May 2, “Structures in Saturn’s F Ring”.
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