Observations of Magnetic Fields
نویسندگان
چکیده
منابع مشابه
Observations of Magnetic Fields - J.P. Vallée
The observational study of galactic magnetic fields dates back to 1949; an excellent review of the early 30 years has been made by Verschuur (1979). I review here the developments since then and the current state of our observational knowledge on the magnetic fields inside and outside the Milky Way galaxy, for objects with sizes greater than 1 parsec (= 3.2 light-years; = 3.1 × 1016 m). Include...
متن کاملObservations of the Magnetic Fields in Galaxies
After a short introduction on how we get information of the magnetic fields from radio observations I discuss the results concerning the magnetic field structure in galaxies: Large-scale regular magnetic field pattern of spiral structure exist in grand-design spirals, flocculent and even irregular galaxies. The regular field in spirals is aligned along the optical spiral arms but strongest in t...
متن کاملMagnetic Fields in Clusters: Theory vs. Observations
It is now well established that the plasma in galaxy clusters is magnetized. In some cases, at least, the field is strong enough to be dynamically important. Perhaps this is the time to move past simple detection experiments, and to work towards a general understanding of the strength, structure and maintenance of the cluster field.
متن کاملThe Generation of Magnetic Fields and X-ray Observations
We show that strong magnetic fields can be generated at shock waves associated with formation of galaxies or clusters of galaxies by the Weibel instability, an instability in collisionless plasmas. The estimated strength of the magnetic field generated through this mechanism is close to the order of values observed in galaxies or clusters of galaxies at present, which indicates that strong ampl...
متن کاملFaraday Rotation Observations of Magnetic Fields in Galaxy Clusters
The presence of magnetic fields in the intracluster medium in clusters of galaxies has been revealed through several different observational techniques. These fields may be dynamically important in clusters as they will provide additional pressure support to the intracluster medium as well as inhibit transport mechanisms such as thermal conduction. Here, we review the current observational stat...
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ژورنال
عنوان ژورنال: Australian Journal of Physics
سال: 1992
ISSN: 0004-9506
DOI: 10.1071/ph920569