Kinematics of the ring-like nebula SuWt 2

Details Kinematics of the ring-like nebula SuWt 2 Kinematics of the ring-like nebula SuWt 2

2009-09-02

arxiv.org/abs/0909.0448v2

2010, MNRAS, 401, 405

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

7 pages, 4 figures. Accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2009.15650.x

We present the first detailed spatio-kinematical analysis and modelling of the Southern planetary nebula SuWt 2. This object presents a problem for current theories of planetary nebula formation and evolution, as it is not known to contain a central post-main sequence star. Deep narrowband [NII]6584 images reveal the presence of faint bipolar lobes emanating fromthe edges of the nebular ring. Longslit observations of the H-alpha and [NII]6584 emission lines were obtained using EMMI on the 3.6-m ESO-NTT. The spectra reveal the nebular morphology as a bright torus encircling the waist of an extended bipolar structure. By deprojection, the inclination of the ring is found to be 68$\degr$ $\pm$ 2$\degr$ (c.f. ~90$\degr$ for the double A-type binary believed to lie at the centre of the nebula), and the ring expansion velocity is found to be 28 km/s. Our findings are discussed with relation to possible formation scenarios for SuWt 2. Through comparison of the nebular heliocentric systemic velocity, found here to be -25 $\pm$ 5 km/s, and the heliocentric systemic velocity of the double A-type binary, we conclude that neither component of the binary could have been the nebular progenitor. However, we are unable to rule out the presence of a third component to the system, which would have been the nebula progenitor.

Affiliated with

Also associated with

No associations

Rating

Kinematics of the ring-like nebula SuWt 2 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 Kinematics of the ring-like nebula SuWt 2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kinematics of the ring-like nebula SuWt 2 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-12741