Results 211 to 220 of about 37,251 (259)
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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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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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Observations of Interstellar Magnetic Fields
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 ...
Richard Crutcher +2 more
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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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Interstellar magnetic field effects on the heliosphere
AIP Conference Proceedings, 2003This paper summarizes the numerical results obtained by three‐dimensional MHD simulations of the interaction between the solar wind and interstellar medium in Ratkiewicz and Ben‐Jaffel [2002], Ratkiewicz and McKenzie [2002], and Ratkiewicz and Webb [2002].
Ratkiewicz, R. +3 more
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Magnetic fields in dense interstellar clouds
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1981Evidence is presented that shows that magnetic fields pervade the entire interstellar medium including interstellar gas clouds of both low and high density. The magnetic field in the ‘seed’ gas from which the denser clouds form is 0.2-0.3 nT (1T — 10 4 G).
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Interstellar: The Galactic Magnetic Field
Publications of the Astronomical Society of Australia, 1969Over a period of one year from March 1967, the 24-inch rotatable telescope at Siding Spring Observatory was used to make polarization measurements for about 1400 stars, most of which were within 400 pc of the Sun. It was found that the E vectors of the polarization formed quite definite patterns on the sky which could only be produced if the magnetic ...
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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.
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Magnetic fields in interstellar water masers
2008We report the first detection of Zeeman splitting in the (616−523) rotational transition of interstellar H2O masers. The measurements of Stokes parameter V and I spectra (circular polarization) have been performed at the MPIfR 100-m telescope. Depending on the hyperfine transition that is actually masing, we derive typical magnetic field strengths of B‖
D. Fiebig, R. Güsten
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