Journal Article

A giant dusty bipolar structure around the planetary nebula NGC 1514

B. Aryal, C. Rajbahak and R. Weinberger

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 402, issue 2, pages 1307-1312
Published in print February 2010 | ISSN: 0035-8711
Published online February 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2009.15966.x
A giant dusty bipolar structure around the planetary nebula NGC 1514

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The transition from spherically symmetric asymptotic giant branch mass loss to aspherical planetary nebulae is an intriguing problem of stellar astrophysics. On 12 μm maps of the Infrared Astronomical Satellite (IRAS), we detected a huge (2.6 pc) dust emission region around the evolved planetary nebula NGC 1514. On 100 and 60 μm IRAS maps, we additionally found two giant (2.1 and 0.9 pc) bipolar dust emission structures centred on NGC 1514; we suspect that each of these regions is physically connected to the planetary nebula. The bipolar structures are slightly tilted with respect to each other, possibly due to precession. The total mass (dust + gas) of all structures is 2.2 ± 1.4 M. We argue that NGC 1514 and its dusty surroundings represent one of the very few known cases where the preserved history of all main mass-loss phases of a star of intermediate initial mass can be seen.

Keywords: ISM: clouds; dust, extinction; ISM: structure; infrared: ISM

Journal Article.  5036 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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