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Mercury's helium exosphere after mariner 10's third encounter
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hartle, R. E. Curtis, S. A. |
| Copyright Year | 1977 |
| Description | From Mariner 10 third encounter UV data, a value of .00045 was calculated as the fraction of the solar wind He++ flux intercepted and captured by Mercury's magnetosphere if the observed He atmosphere is maintained by the solar wind. If an internal source for He prevails, the corresponding upper bound for the global outgassing rate is estimated to be 4.5 x 10 to the 22nd power per sec. A surface temperature distribution was used which satisfies the heat equation over Mercury's entire surface using Mariner 10 determined mean surface thermal characteristics. The means stand off distance of Mercury's magnetopause averaged over Mercury's orbit was also used. |
| File Size | 2641538 |
| Page Count | 31 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19780006044 |
| Archival Resource Key | ark:/13960/t2h756t6f |
| Language | English |
| Publisher Date | 1977-11-01 |
| Access Restriction | Open |
| Subject Keyword | Lunar And Planetary Exploration Planetary Atmospheres Planetary Radiation Planetary Temperature Mariner 10 Space Probe Planetary Environments Mercury Planet Helium Solar Wind Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
