Jovian Extinction Events JPL Confirmation of JEE Data. Jovian Extinction Events JPL Confirmation of JEE Data. Modeling the Jovian dust field, moon atmospheres,

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Presentation transcript:

Jovian Extinction Events JPL Confirmation of JEE Data. Jovian Extinction Events JPL Confirmation of JEE Data. Modeling the Jovian dust field, moon atmospheres, flux tubes and Io’s Torus 2013 DPS Conference, October 10, 2013 Denver, Colorado

What is a JEE? Jovian Extinction Event describes a dimming in photometry lightcurves as objects pass behind regions of gas and dust associated with the Jovian System. Since the discovery of this phenomenon about 100 data sets have been acquired from 6 different countries documenting atmospheric diameters and densities surrounding moons and gas and dust trapped in the Torus of Io.

JEE2010 After finding repeated atmospheric extinction JEEs, PI Degenhardt theorized that the Torus material of Io should cause Io to self extinct at the tips of the Torus where the material is line of sight collimated.

Horizons ephemeris displaying path of probing objects behind Europa Europa 20 Europa radii

Europa Extinction data tracing out approximately 20 radii atmosphere

Observe! Predictions, results, and discussions Yahoo Discussion Group JEE_Talk

AAVSO Alert Notice 464: Observers requested for Jovian Extinction Events (JEE2012), Arlot, J.-E., Thuillot, W.,Ruatti, C. and 116 coauthors observers of events: 2009, The PHEMU03 catalogue of observations of the mutual phenomena of the Galilean satellites of Jupiter, Astronomy and Astrophysics, Volume 493, Issue 3, pp Michael E. Brown & Richard E. Hill Discovery of an extended sodium atmosphere around Europa Nature 380, (21 March 1996); doi: /380229a0 Burger, M.H. et al. “Mutual Event Observations of Io's Sodium Corona” (2001) 37X/563/2/1063/52792.text.html Burger, M.H. et al. “Europa’s neutral cloud: morphology and comparisons to Io Matthew H. Burger & Robert E. Johnson” Icarus 171 (2004) 557–560, Degenhardt, S. et. al (2010), Io and Europa Atmosphere Detection through Jovian Mutual Events, The Society for Astronomical Science: Proceedings for the 29th Annual Symposium on Telescope Science, p Degenhardt, S.M., “JEE2012 Call for Observers” (2012) Degenhardt, S.M., “JEE2013 Call for Observers” (2012) Degenhardt, S.M. (2012), Yahoo Discussion Group JEE_Talk, Degenhardt, S. M., Jovian Extinction Event Predictions and Reduction Methods, Author and developer: Observations and data from S. Aguirre, S. Degenhardt, M. Hoskinson, A. Scheck, B. Timerson, D. Clark, T. Redding, J. Talbot, JPL Horizons On-Line Degenhardt, S.M., “Io atmospheric extinction predictions for 2009 Jovian Mutual Events” (2009) References

Degenhardt, S.M., “Jovian Extinction Event (JEE) predictions for 2010” (2010) Kuznetsov, A.A. et. al, “Formation of zebra pattern in low-frequency Jovian radio emission” (2012), arXiv: v1 [astro- ph.EP], Planetary & Space Science Lang, K.R., flux tube diagram, (2010) Lersch, Thomas, Zebra photo, LiMovie Miyashita, K., LiMovie, (2008) software to photometrically reduce AVIs. net.ne.jp/k_miyash/occ02/limovie_en.html NASA, Juno Space Probe Mission, NSDC (Natural Satellites Data Center) database web address: Schneider, N. M. et al., “The structure of Io's corona” (1991), ApJ, 368, 298 Solar System Dynamics Group, Horizons On-Line Ephemeris System, Author : Warner, B., “Lightcurve Photometry and Analysis”, (2006), Springer Science+Media, Inc. References (cont.)