Radio Polarimetry as a Probe of Interstellar Magnetism
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منابع مشابه
Revealing Cosmic Magnetism with Radio Polarimetry
While gravitation sustains the on-going evolution of the cosmos, it is magnetism that breaks gravity’s symmetry and that provides the pathway to the non-thermal Universe. By enabling processes such as anisotropic pressure support, particle acceleration, and jet collimation, magnetism has for billions of years regulated the feedback vital for returning matter to the interstellar and intergalacti...
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We present our results from the Southern Galactic Plane Survey, an effort to map the fourth quadrant of the Milky Way in linear polarization at a frequency of 1.4 GHz and at a resolution of 1–2 arcmin. These data are a powerful probe of both the turbulence and large-scale structure of magneto-ionic gas, and have revealed a variety of new features in the interstellar medium.
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The origin of magnetic fields in the Universe is an open problem in astrophysics and fundamental physics. Our present-day knowledge is limited to regions of strong magnetic fields and to starforming disks of galaxies. Cosmic-ray electrons emitting at high (GHz) radio frequencies can propagate only a few kpc from their places of origin due to their lifetime limited by energy losses. Low-energy e...
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The origin of magnetic fields in the Universe is an open problem in astrophysics and fundamental physics. “Cosmic Magnetism” has been accepted as Key Science Project both for the Low Frequency Array (LOFAR, under construction) and the planned Square Kilometre Array (SKA). At low frequencies LOFAR and SKA will allow to map the structure of weak magnetic fields in the outer regions and halos of g...
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تاریخ انتشار 2009