Results 91 to 100 of about 372 (130)
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Observations of Interstellar Magnetic Fields
Lecture Notes in Physics, 2003This article describes how interstellar magnetic fields are detected, measured, and mapped, the results of such observations, and the role played by interstellar magnetic fields in the physics of the interstellar medium. A goal of the observations is the measurement of the morphology and strengths of the uniform (B u) and random (B r) components of ...
Carl Heiles, Heiles Carl
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Observing Interstellar and Intergalactic Magnetic Fields
Annual Review of Astronomy and Astrophysics, 2017Observational results of interstellar and intergalactic magnetic fields are reviewed, including the fields in supernova remnants and loops, interstellar filaments and clouds, Hii regions and bubbles, the Milky Way and nearby galaxies, galaxy clusters, and the cosmic web. A variety of approaches are used to investigate these fields.
J L Han
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Magnetic Fields in the Multiphase Interstellar Medium
Space Science Reviews, 2012We discuss the interstellar magnetic field and its measurement in the different phases of the interstellar medium. The measurement techniques include Faraday rotation, Zeeman splitting, linear polarization from aligned dust grains, and the Chandrasekhar-Fermi method.
Carl Heiles, Marijke Haverkorn
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Measurement of Magnetic Fields in Interstellar Clouds
Nature, 1962A new and successful attempt to measure magnetic fields in the Milky Way using the 250-ft radio telescope at Jodrell Bank is reported. The measurements were made by observing the Zeeman splitting of the neutral hydrogen line profiles. The strongest indication of Zeeman splitting was shown by the narrow deep feature of Taurus A.
G L Verschuur, Davies R D
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Interstellar Polarization, Galactic Magnetic Fields, and Ferromagnetism
Science, 1949Lyman Spitzer
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Advances in Space Research, 1982
Abstract For three decades, magnetic fields have been known to permeate interstellar space. Each decade focussed attention on a different problem concerning the role of magnetic fields in star formation, and developed distinct techniques for the solution of the respective problem. A historical perspective of this period is given first.
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Abstract For three decades, magnetic fields have been known to permeate interstellar space. Each decade focussed attention on a different problem concerning the role of magnetic fields in star formation, and developed distinct techniques for the solution of the respective problem. A historical perspective of this period is given first.
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The Interstellar Magnetic Field
Annual Review of Astronomy and Astrophysics, 1976Direct measurements of the interstellar magnetic field can be made only by measuring its effects on the polarization of radiation. The important effects relevant to the interstellar field are summarized. Measurements of the local field, the field on the galactic scale, the field in clouds and the field in very dense clouds are reviewed.
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1987
Methods to observe magnetic fields are considered. Next, results for external galaxies are reviewed; I conclude that most results are questionable. Next, the Galactic field is reviewed. The large-scale field decreases slowly with Galactic radius and z, and has a strength ~ 4 µG near the Sun. It is a roughly circular field, which may reverse one or more
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Methods to observe magnetic fields are considered. Next, results for external galaxies are reviewed; I conclude that most results are questionable. Next, the Galactic field is reviewed. The large-scale field decreases slowly with Galactic radius and z, and has a strength ~ 4 µG near the Sun. It is a roughly circular field, which may reverse one or more
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Measurement of the Interstellar Magnetic Field
Nature, 1968The discovery of linear polarization of the radio emission from the pulsating radio stars1 provides an opportunity for the first direct measurement of the average magnetic field over distances of up to 100 pc from the Sun. It has already been shown2,3 that the frequency dispersion in arrival time of the pulses can be entirely explained by a dispersion ...
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