NASA Quarterly
UVIS
Q2 - 2011
(February - April 2011)
Quarterly
1
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UVIS: Accomplishments
•
Science Highlights
–
Quarterly
Bradley: Obtained reasonable values for ring particle bond albedo and asymmetry parameter in the FUV for
the main rings
2
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UVIS: Science Highlights
Far-UV (170-190 nm) albedo map of Mimas, with high-energy electron flux contours shown. UVIS data are
compared with the CIRS image of the thermal anomaly. The FUV-bright regions (red-orange) may be correlated with
E-ring grain bombardment; the darker (green) regions could be where H2O2 is created by electron bombardment.
•
Mimas data from February 2010 flyby (rev 126) analyzed to compare UV albedo pattern with the CIRS thermal
signature and ISS visible albedo variations (Hendrix & Cassidy). Paper in preparation; to be submitted in April
2011. Results suggest a correlation with the CIRS-measured thermal anomaly and the ISS-measured “lens” that
are likely related to high-energy electrons interacting with the low latitudes of the leading hemisphere (Paranicas
et al. 2011). The UVIS results may also be related to the E-ring grain bombardment. (Hendrix)
Quarterly
3
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UVIS: Accomplishments
• Publications
– Published this quarter
4
–
In Press (Went into press Feb-Apr and also includes still in press from earlier quarters)
3
–
Submitted (Submitted Feb-Apr and also includes submitted earlier and still in review)
8
–
Published 2011 to date:
8
–
Published Entire mission
127
• Presentations at scientific conferences (Feb - Apr 2011)
–
2 paper at EGU, April 3-8, 2011, Vienna (Albers, Radioti)
–
1 paper at Fifth Workshop on Titan Chemistry, April 11-14, 2011, Kauai, HI (Yung)
–
2 papers at the Cassini MAPS workshop, Annapolis, MD, April 27-29 2011 (Hendrix, Cassidy)
• Public Outreach and Press Activities (Feb - Apr 2011)
–
0: public talks
–
0: press releases
–
0: press conferences (phone, TV interviews)
Quarterly
4
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UVIS: Plans
– Science Plans (May - Jul 2011)
•
Bradley: Use retrieved ring particle albedos in the FUV to investigate ring particle composition
•
Hansen: Plan the configuration for the 2-star occultation by Enceladus' plume coming up on Rev 155 (executes in the subsequent
quarter)
•
Colwell: Numerical simulations of miniature propeller structures in rings and comparison to data.
•
Colwell: Analyze holes in rings from stellar occultations.
•
Colwell: Analyze statistics of ring stellar occultation data.
•
Colwell: Analyze Rev 9 solar occultation data for information on particle sizes in F ring.
– Publications (May - Jul 2011) — In preparation (includes submitted, but not yet published)
•
1 paper in review at GRL.
•
1 paper in press in the proceedings book of the IAU Symposium 263
•
5 papers in review in Icarus
•
2 papers in press and 1 in review at JGR
•
1 papers in review in Planet. Space. Sci.
11
– Upcoming presentations at scientific conferences (May - Jul 2011)
•
1 paper at Icy Satellites Workshop in Noordwijk, The Netherlands, June 13, 2011, (Hansen)
•
1 paper at Rings 2011 Workshop at Cornell, July, 2011 (Bradley)
•
1 paper Magnetospheres of the Outer Planets (MOP), Boston (TBD), July 2011 (Hendrix)
– Public Outreach and Press Activities (May - Jul 2011)
Quarterly
•
0: public talks
•
0: press releases
•
0: press conferences (phone interviews)
5
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Backup Material
Quarterly
6
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UVIS: Publications - 2011
•
Ajello, J.M., R.S. Mangina, R.R. Meier. 2010. UV Molecular Spectroscopy from Electron Impact for Applications to Planetary
Atmospheres and Astrophysics. Eds., Y. Hatano, Y. Katsumura, and A. Mozumder, In Charged Particle and Photon Interactions with
Matter, Recent Advances, Applications, and Interfaces, Taylor & Francis, Boca Raton. (Published December 13, 2010 but missed Q1
report)
•
Colwell, J. E., L. W. Esposito, R. G. Jerousek, M. Sremcevic, D. Pettis, and E. T. Bradley. 2010. Cassini UVIS Stellar Occultations of
Saturn’s Rings. Astron. J. Volume 140, Issue 6, pp. 1569-1578. (published 12/10)
•
Elliott, J.P. and L.W. Esposito. 2010. Regolith Depth Growth on an Icy Body Orbiting Saturn and Evolution of Bidirectional Reflectance
due to Surface Composition Changes. Icarus. (Published 12/2010)
•
Gerard, J.-C., B. Hubert, J. Gustin, V. I. Shematovich, D. Bisikalo, L. Esposito, A.I. Stewart, 2010. EUV spectroscopy of the Venus
dayglow with UVIS on Cassini. Icarus (In press Sept. 2010)
•
Hedelt, P., Ito, Y., Keller, H.U., Lammer, H., Rauer, H., Reulke, R., Wurz, P., Esposito, L. 2010. Titan’s atomic hydrogen corona. Icarus,
Volume 210, Issue 1, p. 424-435 (Published 11/2010)
•
Pryor W.R., A.M. Rymer, D.G. Mitchell, T.W. Hill, D.T. Young, J. Saur, G.H. Jones, S. Jacobsen, S.W.H. Cowley, B.H. Mauk, A.J.
Coates, J. Gustin, D. Grodent, J.-C. Gerard, L. Lamy, J. D. Nichols, S.M. Krimigis, L.W. Esposito, M.K. Dougherty, A.. Jouchoux, A.I.F.
Stewart, W.E. McClintock, G.M. Holsclaw, J.M. Ajello, J.E. Colwell, A.R. Hendrix, F.J. Crary, J.T. Clarke, X. Zhou. 2011. The Enceladus
auroral footprint at Saturn. Nature. (To be published in the Apr 21 issue, but missed Q1 report)
•
Xu, F, A. B. Davis, R. A. West and L. W. Esposito. 2011. Markov chain formalism for polarized light transfer in plane-parallel
atmospheres, with numerical comparison to the Monte Carlo method. Optical Express. (In press Dec. 20, 2010)
•
Zhang X., Ajello, J.M., and Yung, Y.L.,. 2009. Atomic carbon in the upper atmosphere of Titan. Astrophysical Journal Letters. 708, 1,
L18-L21. (Published 2010, but missed Q1 report.)
Quarterly
7
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UVIS: Publications (In Press)
•
Ajello, J.M, R. S. Mangina, D. J. Strickland, D. Dziczek. 2010. Laboratory studies of UV emissions from proton impact on N2: The LymanBirge-Hopfield Band System for aurora analysis. JGR. (Accepted January per Joe but missed Q1 report.)
•
Hendrix, A.R. and C. J. Hansen. 2010. The Surface Composition of Enceladus: Clues from the Ultraviolet. Proceedings book of the IAU
Symposium 263. DOI: 10.1017/S1743921310001626 (In press Dec. 2009, Published online: 06 Apr 2010)
•
Stevens, M.H., J. Gustin, J.M. Ajello, J.S. Evans, R.R. Meier, A. J. Kochenash, A.W. Stephan, A.I.F. Stewart, L.W. Esposito, W.E.
McClintock, G. Holsclaw, E. T. Bradley, B.R. Lewis. 2010. The Production of Titan’s Far Ultraviolet Nitrogen Airglow. JGR. (Accepted Feb
2011.)
Quarterly
8
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UVIS: Publications (Submitted)
•
Albers, N, M. Sremcevic, J.E. Colwell, and L.W. Esposito. 2009. Saturn’s F Ring as seen by Cassini UVIS: Kinematics and Statistics.
Icarus. (Submitted February, 2009)
•
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. (Submitted December 2011)
•
Esposito, L.W.E., Albers, N., Meinke, B.K., Sremcevic, M., Colwell, J.E. 2010. Moon-triggered Clumping in Saturn’s Rings. Icarus.
(Submitted October 2, 2009)
•
Gerard, J.-C., J. Gustin, B, Hubert, G.R. Gladstone and L.W. Esposito. 2011. Measurements of the Helium 584‐ﾅ airglow during the
Cassini flyby of Venus. Planetary Space Sci. (Submitted February 24, 2011)
•
Hansen, C. J., D. E. Shemansky, L. W. Esposito, A. I. F. Stewart, B. R. Lewis, J. E. Colwell, A. R. Hendrix, R. A. West. 2011. The
Composition and Structure of the Enceladus Plume. GRL. (Submitted to Science December 3, 2010. Rejected Jan 5, 2011. Resubmitted
to GRL March 11, 2011)
•
Hendrix, A. R., T. A. Cassidy, C. Paranicas, C. J. Hansen 2011. The Albedo Pattern of Mimas as measured by Cassini UVIS. Icarus.
(anticipating submission April 2011).
•
Jerousek, R. G., Colwell, J. E., Esposito, L. W. 2010. Morphology and Variability of Sharp Edges in Saturn's Rings. Icarus (submitted
April 7, 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 (Submitted to JGR March 16, 2011)
Quarterly
9
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UVIS: Science Presentations - Q2-2011 (Feb - Apr 2011)
– LPSC, March 7-11, 2011, The Woodlands, TX
•
Esposito (other authors?): Title?.
– EGU, April 3-8, 2011, Vienna
•
N. Albers, M. Sremcevic, and L.W. Esposito: Moon-influenced ringlets and edges in Saturn's rings
•
Radioti A., D. Grodent , J.-C. Gérard , S. E. Milan , B. Bonfond , J. Gustin and W. Pryor : Bifurcations of the
main auroral ring at Saturn
– Titan Chemistry, April 11-14, 2011, Kauai, HI
•
Y. L. Yung, M. C. Liang and X. Zhang: Organic Synthesis In The Atmosphere Of Titan: Modeling and Recent
Observations
– Cassini MAPS workshop, Annapolis, MD, April 27-29 2011
Quarterly
•
Hendrix, Cassidy et al.: The UV effects of magnetosphere-satellite interactions on the satellite surfaces
•
Cassidy, Hendrix et al.: The UV albedo pattern of Tethys
10
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UVIS: Outreach - Q2-2011 (Feb - Apr 2011)
• #: EPO: Talks to school children, teachers and public
–
None this quarter
• #: Press releases
–
None this quarter
• #: Press conferences & interviews
–
None this quarter
Quarterly
11
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