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Activity and magnetic fields on stars from radio observations
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Dulk, G. A. |
| Copyright Year | 1983 |
| Description | Radio observations explain certain kinds of stellar activity and reliable estimates of magnetic field strengths are derived for the radio emitting regions. Radio observation of flare stars shows rapidly varying bursts of radiation with frequencies of up to 5 GHz. The inferred brightness temperatures of these bursts (10 to the 10th power to 10 to the 14th power) imply that the radiation is coherent. Two mechanisms are proposed to generate such radiation: (1) plasma radiation, and (2) electron cyclotron masers. The high brightness temperatures of the bursts up to 10 to the 20th power K) makes the latter the most plausible. For bursts in the 5 GHz range, the magnetic field strength would be approximately 900 Gauss. |
| File Size | 216909 |
| Page Count | 5 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19850021549 |
| Archival Resource Key | ark:/13960/t4zh1g740 |
| Language | English |
| Publisher Date | 1983-01-01 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Stellar Magnetic Fields Radio Astronomy Stellar Radiation Space Observations From Earth Plasma Radiation Interstellar Masers Stellar Activity Flare Stars Stellar Coronas Radio Observation Stellar Flares 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 |
