Research NewsAstronomy

Mapping a Star's Magnetic Field

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Science  06 Jun 1997:
Vol. 276, Issue 5318, pp. 1500
DOI: 10.1126/science.276.5318.1500

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Astronomers have enlisted a continent-wide array of radio telescopes to make the first map of the magnetic field around a star other than our sun. The map, constructed by measuring the polarization of radio waves from clouds of excited gas around the red giant star, suggests that its magnetic field has roughly the same shape as the fields of Earth and the sun.