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Science 5 October 2001:
Vol. 294. no. 5540, p. 9
DOI: 10.1126/science.294.5540.9b
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This Week in Science

Relativistic jets of collimated hot plasma from active galactic nuclei provide information about the physical and chemical properties that drive these energetic structures. Lobanov and Zensus (p. 128) used the HALCA radio telescope spacecraft and an array of ground-based radio telescopes to create a high-resolution image of the structure of the jet from quasar 3C273. The jet's exquisite double-helix structure, which results from different modes of a Kelvin-Helmholtz instability, should provide an important test for improving models of the difficult-to-observe active galactic nuclei.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)