Extreme Scattering Events: An Observational Summary View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

2001

AUTHORS

T. Joseph W. Lazio , Alan L. Fey , R. A. Gaume

ABSTRACT

We review observational constraints on the structures responsible for extreme scatteringevents, focussing on a series of observations of the quasar PKS 1741-038. VLA observations wereconducted to search for changes in the rotation measure and HI absorption during the ESE, whileVLBI observations sought ESE-induced changes in the source’s image. No RM changes were foundimplying B∥ < 12 mG, and no HI opacity changes were found implying (HI) < 6.4 x 1017 cm-2.No multiple imaging was observed, but the diameter of the source increased by 0.7 mas, contrary towhat is predicted by simple refractive lens modeling of ESEs. We summarize what these limits implyabout the structure responsible for this ESE. More... »

PAGES

155-158

Book

TITLE

Sources and Scintillations

ISBN

978-94-010-3879-9
978-94-010-1001-6

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-94-010-1001-6_29

DOI

http://dx.doi.org/10.1007/978-94-010-1001-6_29

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1008507663


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