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Cosmic-ray heating of the interstellar gas
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Begelman, Mitchell C. |
| Copyright Year | 1995 |
| Description | Cosmic rays streaming out of the Galaxy can become locked to resonantly excited Alfven waves as they pass through a region of increasing temperature at the disk-halo interface. A large fraction of the energy is approximately greater than 1 GeV cosmic rays goes into heating of the thermal gas via nonlinear Landau damping of the waves. This mode of cosmic-ray heating can balance radiative cooling for gas in the temperature range 10(exp 4.5) K approximately less than T approximately less than 10(exp 6), creating a thermal transition zone with a column density exceeding that of an ordinary conductive interface. This layer could be the site of much of the observed emission and absorption by highly ionized species such as C IV, N V, and O VI. |
| File Size | 445765 |
| Page Count | 10 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19960016984 |
| Archival Resource Key | ark:/13960/t7rn8373z |
| Language | English |
| Publisher Date | 1995-01-01 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Galactic Halos Ionized Gases Temperature Distribution Accretion Disks Cosmic Rays Galactic Radiation Interfaces Landau Damping Thermal Emission Gas Cooling Magnetohydrodynamic Waves Gas Heating Nonlinearity Interstellar Gas Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
