ground based and messenger observations of mercury’s exosphere
DESCRIPTION
GROUND BASED AND MESSENGER OBSERVATIONS OF MERCURY’S EXOSPHERE. The Bepi-Colombo-MESSENGER Serena Workshop Key Largo, Florida, May 14-16, 2013 Rosemary Killen & The MASCS Team & Andrew Potter, Thomas Bida, Kevin Reardon. The Na D line. - PowerPoint PPT PresentationTRANSCRIPT
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GROUND BASED AND MESSENGER OBSERVATIONS OF MERCURY’S
EXOSPHERE
The Bepi-Colombo-MESSENGER Serena Workshop
Key Largo, Florida, May 14-16, 2013
Rosemary Killen&
The MASCS Team & Andrew Potter, Thomas Bida, Kevin Reardon
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The Na D line
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Mercury Na Exosphere during transit of 2006, Dunn Solar TelescopePotter, Killen, Bida, Reardon
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Na exosphere Transit 2003Schleicher et al.
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Na Jan.08
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Na Observed from Kitt PeakPotter & Killen
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Sodium ExosphereMoon and Mercury
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Sodium Tail from Kitt Peak
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Potassium Emission
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Na/K Map
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Abundance of Potassium in RocksPatrick N. Peplowski, Larry G. Evans
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Abundance of Na in Rocks
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Corrected Na Emission vs. TAA
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Keck Observations Na June 9, 2000
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Mercury Ca 9 June 2000
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Ca May 3, 2002
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Ca June 27, 2005
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Ca May 15 2008
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Summary• Na/K shows N enhancement in the exosphere– but K is more enhanced in the rock at N than Na
•Na scale height is lower over the polar regions than equatorial regions indicative of lower temperature
-but this does not seem to be the case in MESSENGER data•Na occasionally shows high latitude enhancements but not always•Na sometimes shows dawn enhancements but not always•We saw no dawn enhancement in 2006: TAA 330•Ca appears to be in a wide corona as seen from dawn or dusk