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Astron. Astrophys. 353, L5-L8 (2000)

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Letter to the Editor

Molecular bullets in the planetary nebula BD+30o3639

R. Bachiller 1, T. Forveille 2, P.J. Huggins 3, P. Cox 4 and J.P. Maillard 5

1 IGN Observatorio Astronómico Nacional, Apartado 1143, 28800 Alcalá de Henares, Spain
2 Observatoire de Grenoble, B.P. 53X, 38041 Grenoble Cedex, France
3 New York University, Physics Department, 4 Washington Place, New York, NY 10003, USA
4 Université de Paris XI, Institut d'Astrophysique Spatiale, 91405 Orsay, France
5 Institut d'Astrophysique de Paris, CNRS, 98bis bd. Arago, 75014 Paris, France

Received 13 October 1999 / Accepted 2 December 1999

Abstract

We report high resolution ([FORMULA]) CO line imaging of the compact planetary nebula BD+30o3639 that reveals a remarkable pair of high-velocity, molecular knots, or "bullets". These bullets are [FORMULA] in size, and are symmetrical about the central star in position ([FORMULA] at P.A. [FORMULA]) and in velocity ([FORMULA] km s-1). The mass of each bullet is [FORMULA] [FORMULA] and their kinematic age is [FORMULA] yr. The high velocity and symmetry of these structures indicate underlying bipolar jets from the central star that interact with the surrounding neutral gas. The unexpected presence of the bullets in BD+30o3639 strengthens the idea that jets are common and play a crucial role in the shaping of planetary nebulae.

Key words: ISM: planetary nebulae: general – ISM: planetary nebulae: individual: BD+30o3639 – ISM: jets and outflows – stars: Wolf-Rayet – stars: winds, outflows

Send offprint requests to: bachiller@oan.es

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© European Southern Observatory (ESO) 2000

Online publication: December 17, 1999
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