Abstract
We report the detection of millimeter CO emission from a dense, expanding disk of molecular gas, ≈ 20'' in diameter, at the center of the remarkable 14' × 4', bipolar, episodic jet system of the planetary nebula KjPn 8. The disk surrounds the compact photoionized core and exceeds it in mass by at least an order of magnitude. The disk axis lies at a position angle of ≈ 115° and appears to be aligned with the most prominent and youngest of the bipolar jets. The disk axis is not, however, aligned with the older, more extensive bipolar structure of the nebula at a position angle of ≈ 71°, indicating that major changes have taken place in the escape of matter from the central star system over the last ≈ 5000 yr.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
