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Issue A&A
Volume 416, Number 3, March IV 2004
Page(s) L27 - L30
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20040054



A&A 416, L27-L30 (2004)
DOI: 10.1051/0004-6361:20040054

Letter

A pair of gigantic bipolar dust jets close to the solar system

R. Weinberger and B. Armsdorfer

Institut für Astrophysik, Universität Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria
    e-mail: ronald.weinberger@uibk.ac.at;birgit.armsdorfer@uibk.ac.at
(Received 4 December 2003 / Accepted 10 February 2004)

Abstract
We present two adjacent jet candidates with a length of ${\sim}9\degr$ each - 10 $\times$ longer than the largest known jets - discovered by us on 60  $\mu$m and 100  $\mu$m IRAS maps, but not observed at any other wavelength. They are extremely collimated (length-to-width ratios 20-50), curved, knotty, and end in prominent bubbles. Their dust temperatures are 25 $\pm$ 3 K and 30 $\pm$ 4 K, respectively. Both harbour faint stars, one having a high proper motion ( $0\farcs23$ yr -1) and being very red, suggesting a distance of ~60 pc. At this distance, the combined mass of both jets (assuming a gas-to-dust ratio of 200) totals ~1  $M_{\odot}$. We suspect that these gigantic ( ${\sim}9$ pc length) jets have a common origin, due to the decay of a system of evolved stars. They are the first examples of jets radiating in the far IR and might be the closest non-diffuse nebulae to the solar system.


Key words: infrared: ISM, continuum -- ISM: jets and outflows

Offprint request: R. Weinberger, ronald.weinberger@uibk.ac.at

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