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Studies of Titan's 5-Micron-Bright Regions Using Combined VIMS and ISS Observations

Studies of Titan's 5-Micron-Bright Regions Using Combined VIMS and ISS Observations. Jason W. Barnes Brown, R H ; Radebaugh, J; Buratti, B J ; Sotin, C; LeMouelic, S; Rodriguez, S; Turtle, E ; Perry, J; Clark, R; Baines, K H ; Nicholson, P. Hotei Regio, Hotei Arcus.

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Studies of Titan's 5-Micron-Bright Regions Using Combined VIMS and ISS Observations

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  1. Studies of Titan's 5-Micron-Bright Regions Using Combined VIMS and ISS Observations Jason W. Barnes Brown, R H; Radebaugh, J; Buratti, B J; Sotin, C; LeMouelic, S; Rodriguez, S; Turtle, E; Perry, J; Clark, R; Baines, K H; Nicholson, P

  2. Hotei Regio, Hotei Arcus Barnes et al. 2005, Science

  3. Tui Regio VIMS: R=5 micronsG=2 micronsB=1.28 microns

  4. Candidate Source VIMS ISS Barnes et al. 2006, GRL

  5. T20 5-micron-bright Flow

  6. VIMS Titan Spectrum

  7. Phase-angle Restricted Map

  8. Searching for Absorption Features I/F With Albedo Albedo-subtracted (color only)

  9. 4.92-Micron Feature Map High S/N Tui View (T12 VIMS) Cluster Analysis Map of 4.92um absorption

  10. 4.92-Micron Absorption Plot

  11. Other 5-Micron-Bright Features Low Clouds / Fog? T9 Red ‘island’ T5 Scour

  12. Conclusions • T20 high-res data show feature consistent with 5-micron-bright flow near T3 RADAR vent candidate • 5-micron-bright area Tui Regio shows 4.92-um absorption band • Eir Macula dark spot also shows absorption • Common minor component • Thin coating covers Tui & Eir both • Grain size / phase difference • Transient 5-micron-bright phenomena could be low clouds or fog • Other smaller, subtler 5-micron-bright faculae or regions exist -- use 4.92-micron feature to tell if these are the same as Tui in future work.

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