The unusual tail of the Tornado nebula

Details The unusual tail of the Tornado nebula The unusual tail of the Tornado nebula

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...432l..39s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 432, no. 1, p. L39-L41

Astronomy and Astrophysics

Astronomy

13

Magnetic Fields, Nebulae, Radio Sources (Astronomy), Stellar Mass Ejection, Infrared Radiation, Interacting Galaxies, Stellar Spectra, Supernovae, Telescopes, X Rays

Scientific paper

We present high-resolution studies at 4.79 and 5.84 GHz, made with the Australian Telescope. These, complemented by 10.55 Ghz observations made with the Effelsberg 100 m telescope, show clear evidence for polarized looplike structure within the Tornado nebula G357.7-0.1. The transverse magnetic field appears to be tangential to the loops, suggesting that a spiral magnetic structure extends from the head to the tail of the nebula. Our observations confirm that the compact source near the head of the Tornado is extended, has a flat spectrum, is probably thermal, and unlikely to be related to the nebula. The symmetry and polarized structure are difficult to explain, but the following are worth investigating: interacting galaxies, slowly precessing Galactic or extragalactic jets, or a supernova blast wave intersecting a preexisting spiral magnetic structure.

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