Molecular bullets in the planetary nebula BD+30o3639

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Ism: Planetary Nebulae: General, Ism: Planetary Nebulae: Individual: Bd+30O3639, Ism: Jets And Outflows, Stars: Wolf-Rayet, Stars: Winds, Outflows

Scientific paper

We report high resolution (1farcs0 x 0farcs5 ) 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 ~ 1arcsec in size, and are symmetrical about the central star in position (+/- 3arcsec at P.A. ~ 22o$) and in velocity (+/- 50 ). The mass of each bullet is >~ 7 x 10-4 Msun and their kinematic age is ~500 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.

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