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Full-Text Articles in Physical Sciences and Mathematics
Radial Velocity Observations Of The Extended Lunar Sodium Tail, E. J. Mierkiewicz, M. Line, F. L. Roesler, R. J. Oliversen
Radial Velocity Observations Of The Extended Lunar Sodium Tail, E. J. Mierkiewicz, M. Line, F. L. Roesler, R. J. Oliversen
Physical Sciences - Daytona Beach
We report the first velocity resolved sodium 5889.950 Å line profile observations of the lunar sodium tail observed in the anti-lunar direction near new Moon. These observations were made on 29 March 2006, 27 April 2006 and 28 April 2006 from Pine Bluff (WI) observatory with a double etalon Fabry-Perot spectrometer at a resolving power of ∼80,000. The observations were made within 2–14 hours from new Moon, pointing near the anti-lunar point. The average observed radial velocity of the lunar sodium tail in the vicinity of the anti-lunar point for the three nights reported was 12.4 km s−1 (from …
Observations Of Solar Cyclical Variations In Geocoronal Hα Column Emission Intensities, S. M. Nossal, F. L. Roesler, E. J. Mierkiewicz, R. J. Reynolds
Observations Of Solar Cyclical Variations In Geocoronal Hα Column Emission Intensities, S. M. Nossal, F. L. Roesler, E. J. Mierkiewicz, R. J. Reynolds
Physical Sciences - Daytona Beach
Observations of thermospheric + exospheric Hα column emissions by the Wisconsin Hα Mapper (WHAM) Fabry-Perot (Kitt Peak, Arizona) over the 1997–2001 rise in solar cycle 23 show a statistically significant solar cyclical variation. The higher signal-to-noise WHAM observations corroborate suggestions of a solar cycle trend in the Hα emissions seen in Wisconsin observations over solar cycle 22. Here we compare WHAM 1997 and 2000–2001 winter solstice geocoronal Hα observations toward regions of the sky with low galactic emission. The observed variation in geocoronal hydrogen column emission intensities over the solar cycle is small compared with variations in hydrogen exobase densities. …