Proper Motions of the Ansae in the Planetary Nebula NGC 7009

Details Proper Motions of the Ansae in the Planetary Nebula NGC 7009 Proper Motions of the Ansae in the Planetary Nebula NGC 7009

2006-11-24

arxiv.org/abs/astro-ph/0611753v1

Astronomy and Astrophysics

Astrophysics

6 pages, 2 figures

Scientific paper

For the planetary nebula NGC 7009, we present a comparison of two unpublished Very Large Array archive data sets taken with a time separation of 8.09 years to confirm the proper motions of its ansae observed in the optical. We determine values of 23$\pm$6 and 34$\pm$10 mas yr$^{-1}$ for the eastern and western ansae, respectively. There is marginal evidence suggesting that the flux densities of the jets that connect the ansae with the main body of the nebula diminished in about 30% over the period between the two observations. We also set an upper limit to the expansion of the main body of the planetary nebula, setting a lower limit of $\sim$700 pc for its distance.

Affiliated with

Also associated with

No associations

Rating

Proper Motions of the Ansae in the Planetary Nebula NGC 7009 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Proper Motions of the Ansae in the Planetary Nebula NGC 7009, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Proper Motions of the Ansae in the Planetary Nebula NGC 7009 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-539697