Optically Thick Radio Cores of Narrow-Waist Bipolar Nebulae

Abstract

We report our search for optically thick radio cores in sixteen narrow-waist bipolar nebulae. Optically thick cores are a characteristic signature of collimated ionized winds. Eleven northern nebulae were observed with the Very Large Array (VLA) at 1.3 cm and 0.7 cm, and five southern nebulae were observed with the Australia Telescope Compact Array (ATCA) at 6 cm and 3.6 cm. Two northern objects, 19W32 and M 1-91, and three southern objects, He 2-25, He 2-84 and Mz 3, were found to exhibit a compact radio core with a rising spectrum consistent with an ionized jet. Such jets have been seen in M 2-9 and may be responsible for shaping bipolar structure in planetary nebulae.

arXiv comment29 pages, accepted for publication in ApJ

References in corpus (4)

• The Formation of Very Narrow Waist Bipolar Planetary Nebulae
• The "Twin Jet" Planetary Nebula M2-9
• High Resolution CO Imaging of the Molecular Disk around the jets in KjPN 8
• High resolution spectra of bright central stars of bipolar planetary nebulae, and the question of magnetic shaping

Cited by in corpus (5)

• A pilot search for mm-wavelength recombination lines from emerging ionized winds in pre-planetary nebulae candidates
• Planetary Nebulae Detected in the Spitzer Space Telescope GLIMPSE II Legacy Survey
• A collimated, ionized bipolar structure and a high density torus in the young planetary nebula IRAS 17347-3139
• Herschel Planetary Nebula Survey (HerPlaNS): Hydrogen Recombination Laser Lines in Mz 3
• Atlas of monochromatic images of planetary nebulae