galactic magnetic field

galactic magnetic field

A very weak and complex system of magnetic fields, known to exist in the interstellar regions of the Galaxy from observations of the Faraday rotation of radiation from pulsars and other radio sources, of the Zeeman splitting of the 21-cm hydrogen line arising in interstellar clouds, and of interstellar polarization. The magnetic flux density lies in the range 10–10 to 10–9 tesla, with 3–6 × 10–10 tesla being the best estimate. The direction of the field seems to be in the plane of the Galaxy, along the spiral arms. See also cosmic rays.
References in periodicals archive ?
The gaia mission is measuring distances to a billion stars, Providing an opportunity to produce, The first-ever tomographic map of the galactic magnetic field, Using optical polarization of starlight.
The galactic magnetic field is about 100-millionth the strength of a refrigerator magnet, and yet it may be crucial to star formation.
Washington, Feb 14 ( ANI ): New research suggests that the enigmatic "ribbon" of energetic particles discovered at the edge of our solar system by NASA's Interstellar Boundary Explorer (IBEX) may be only a small sign of the vast influence of the galactic magnetic field.
Unknown until now, the direction of the galactic magnetic field may be a missing key to understanding how the heliosphere, the gigantic bubble that surrounds our solar system, is shaped by the interstellar magnetic field and how it thereby helps shield us from dangerous incoming galactic cosmic rays.
The two scientists proposed that ferromagnetic particles and a galactic magnetic field could do the trick.
The group will search for planets around evolved stars to answer the elusive question on the origin of their magnetic field and determine the connection between the galactic magnetic field and that responsible for the formation of jets and potentially disks around young proto-stars.
Kassim suggests that the pelican has a different alignment because the galactic magnetic field has changed direction in that outlying region.
It happens that this model of neutrinos gives them a much larger magnetic moment than the standard one, so it is plausible that on the way from Cyg X-3 some of them are flipped over by the galactic magnetic field.
From the supernova data, considering how the galactic magnetic field would affect neutrinos if they had magnetism, Mann says the observers now can make the limit 100,000 times closer to zero.
The data also reveal that the clover shape is flattened and twisted by galactic magnetic fields acting on the sun as it whizzes through the Milky Way at around 84,000 kilometers per hour--the same magnetic fields that cause a giant ribbon of charged particles to wrap around the edge of the heliosphere (SN: 11/21/09, p.
The map will give scientists valuable knowledge about the structure of Galactic magnetic fields throughout the Milky Way.
These ultra-high-energy nuclei have been trapped in the web of galactic magnetic fields for millions of years, and their arrival directions as they enter the Earth's atmosphere have been "completely randomized by numerous twists and turns in the tangled field," he said.