... A more direct measurement of magnetic field strength can be made using Faraday rotation (FR) and freefree absorption (FFA). ... Discussion We suggest several intrinsic and extrinsic mechanisms to depolarize the emission. ... Beam depolarization: If the magnetic field in a foreground Faraday screen is tangled on scales much smaller than the observing beam, regions with similar degrees of polarization but opposite signs will average out and the ob served degree of polarization will be decreased. ...
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Ссылки http://www.atnf.csiro.au/people/Enno.Middelberg/pubs/middelberg2005b/middelberg2005b.ps.gz -- 113.6 Кб -- 02.06.2004 Похожие документы
... Twenty-Six Year Monitoring of Water Masers IAU Symposium 242, Alice Springs 1 Contents of the work A sample of H2O maser emission sources has been observed since 1980. ... Rudnitskij et al. ... Twenty-Six Year Monitoring of Water Masers IAU Symposium 242, Alice Springs 4 Maser in a protoplanetary disc (S255) Flux density, Jy S255: H2O line profile 5 February 2002 Radial velocity, LSR, km/s Rudnitskij et al. ... Twenty-Six Year Monitoring of Water Masers IAU Symposium 242, Alice Springs 12 ...
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Ссылки http://www.atnf.csiro.au/research/masermeeting/web_papers/523_Rudnitskij.pdf -- 481.0 Кб -- 26.04.2007 Похожие документы
metrologia The leap second: its history and possible future R. A. Nelson, D. D. McCarthy , S. Malys, J. Levine, B. Guinot, H. F. Fliegel , R. L. Beard and T. R. Bartholome w Abstract. This paper reviews the theoretica l motivatio n for the leap second in the context of the historica l evolutio n of time measurement . Th e periodic insertio n of a leap second step into th e scale of Coordinate d Universal Time (UTC) necessitates frequent changes in comple x timekeepin g systems an d is currentl y th e