论文信息 - A 5-Micron-Bright Spot on Titan: Evidence for Surface Diversity

A 5-Micron-Bright Spot on Titan: Evidence for Surface Diversity

Observations from the Cassini Visual and Infrared Mapping Spectrometer show an anomalously bright spot on Titan located at 80°W and 20°S. This area is bright in reflected light at all observed wavelengths, but is most noticeable at 5 microns. The spot is associated with a surface albedo feature identified in images taken by the Cassini Imaging Science Subsystem. We discuss various hypotheses about the source of the spot, reaching the conclusion that the spot is probably due to variation in surface composition, perhaps associated with recent geophysical phenomena.

[1] R. Kirk,et al. Cassini Radar Views the Surface of Titan , 2005, Science.

[2] M. W. Evans,et al. Imaging of Titan from the Cassini spacecraft , 2005, Nature.

[3] J. Burns,et al. Cassini Imaging Science: Instrument Characteristics And Anticipated Scientific Investigations At Saturn , 2004 .

[4] Tom Herbst,et al. A new VLT surface map of Titan at 1.575 microns , 2004 .

[5] Christopher P. McKay,et al. Formation of methane in comet impacts: implications for Earth, Mars, and Titan , 2004 .

[6] D. Campbell,et al. Radar Evidence for Liquid Surfaces on Titan , 2003, Science.

[7] C. Sotin,et al. Observations with the Visual and Infrared Mapping Spectrometer (VIMS) during Cassini's flyby of Jupiter , 2003 .

[8] T. Owen,et al. Evidence for the Exposure of Water Ice on Titan's Surface , 2003, Science.

[9] J. Gilman,et al. Nanotechnology , 2001 .

[10] T. Owen,et al. Transient clouds in Titan's lower atmosphere , 1998, Nature.

[11] Mark T. Lemmon,et al. Titan's Surface, Revealed by HST Imaging , 1996 .

[12] T. Owen,et al. Titan's surface and troposphere, investigated with ground-based, near-infrared observations. , 1991, Icarus.

[13] Kazushi Yamanaka,et al. IN ACOUSTIC MICROSCOPY , 1982 .