Upper Limits to Magnetic Fields in the Outskirts of Galaxies
نویسندگان
چکیده
منابع مشابه
Magnetic fields in galaxies
Disk galaxies, of which the Milky Way is a typical example, possess large scale magnetic fields. The interstellar gas in which the fields reside is removed and replaced on a timescale of about 1/10 of the age of the Galaxy, and the new gas must acquire a magnetic field of the correct strength and direction on this timescale in order to maintain a steady state. The outstanding problem facing all...
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Most of the visible matter in the Universe is ionized, so that cosmic magnetic fields are quite easy to generate and due to the lack of magnetic monopoles hard to destroy. Magnetic fields have been measured in or around practically all celestial objects, either by in-situ measurements of spacecrafts or by the electromagnetic radiation of embedded cosmic rays, gas or dust. The Earth, the Sun, so...
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15 صفحه اولObservations 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...
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ژورنال
عنوان ژورنال: Galaxies
سال: 2017
ISSN: 2075-4434
DOI: 10.3390/galaxies5030055