Flows along cometary tails in the Helix planetary nebula NGC 7293

Details Flows along cometary tails in the Helix planetary nebula NGC 7293 Flows along cometary tails in the Helix planetary nebula NGC 7293

2009-11-25

arxiv.org/abs/0911.4843v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

8 pages, 4 figures, accepted for publication in MNRAS

Scientific paper

Previous velocity images which reveal flows of ionized gas along the most prominent cometary tail (from Knot 38) in the Helix planetary nebula are compared with that taken at optical wavelengths with the Hubble Space Telescope and with an image in the emission from molecular hydrogen. The flows from the second most prominent tail from Knot 14 are also considered. The kinematics of the tail from the more complex Knot 32, shown here for the first time, also reveals an acceleration away from the central star. All of the tails are explained as accelerating ionized flows of ablated material driven by the previous, mildly supersonic, AGB wind from the central star. The longest tail of ionized gas, even though formed by this mechanism in a very clumpy medium, as revealed by the emission from molecular hydrogen, appears to be a coherent outflowing feature.

Affiliated with

Also associated with

No associations

Rating

Flows along cometary tails in the Helix planetary nebula NGC 7293 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 Flows along cometary tails in the Helix planetary nebula NGC 7293, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flows along cometary tails in the Helix planetary nebula NGC 7293 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-623652