Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh21b1594d&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SH21B-1594
Physics
2124 Heliopause And Solar Wind Termination, 2126 Heliosphere/Interstellar Medium Interactions, 2151 Neutral Particles (7837), 2194 Instruments And Techniques
Scientific paper
From the end of the year 2000 until nearly the end of 2005, high energy (10-200 keV/nuc) Energetic Neutral Atom (ENA) flux in the near Earth space environment was measured by the HENA instrument aboard the IMAGE spacecraft. Although the instrument was designed to sense ENA flux originating from magnetospheric sources, the instrument spent a significant amount of time pointed away from both the magnetosphere and the sun. During these periods, the instrument was pointed towards potential ENA emission sources in the outer heliosphere. The count rates in these areas of the sky were very much smaller than those when the instrument was pointed towards magnetospheric sources, thus long term integration is required to extract heliospheric signals. We present here images and spectra from these heliospheric viewing periods assembled from the entire time range of the mission. We've found that the heliospheric emission in areas sampled by HENA are at or very close to the background signal caused by ultraviolet light falling on the detectors. Because of the need to avoid the sun and the magnetosphere, our data set does not include directions close to the nose or interstellar inflow direction. Thus, the results presented here establish upper limits on heliospheric ENA emission in the 10-200 keV/nuc energy range, and can thus be used to constrain models of the processes thought to occur near the heliopause.
Brandt Patrick
DeMajistre Robert
Mitchell Dana D.
Roelof Edmond
No associations
LandOfFree
Upper limits on Energetic Neutral Atom (ENA) emission from the heliosheath established by IMAGE/HENA does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Upper limits on Energetic Neutral Atom (ENA) emission from the heliosheath established by IMAGE/HENA, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Upper limits on Energetic Neutral Atom (ENA) emission from the heliosheath established by IMAGE/HENA will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1246871