Search for an excess rotation measure in the shell around the Eridanus cavity

Details Search for an excess rotation measure in the shell around the Eridanus cavity Search for an excess rotation measure in the shell around the Eridanus cavity

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...196..255v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 196, no. 1-2, May 1988, p. 255-260.

Astronomy and Astrophysics

Astrophysics

5

Faraday Effect, Interstellar Magnetic Fields, Linear Polarization, Quasars, Very Large Array (Vla), H Alpha Line, H I Regions, Zeeman Effect

Scientific paper

The Eridanus shell/cavity has a known distribution of cold H I and warm Hα gas, near the Sun. Observations with the VLA of the polarization of background quasars and galaxies seen through and outside the shell have made possible a search for an excess Faraday rotation in the shell gas, by removing the contribution from the interstellar medium of our Galaxy as seen in quasars and galaxies outside the shell. Only a two-sigma upper limit of 46 rad m-2 for such an excess rotation measure is obtained.

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