Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2012-03-15
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
11 pages, 12 figures, 1 table, Accepted to MNRAS
Scientific paper
BD +30 3639 is a member of a group of uncommon planetary nebula with Wolf-Rayet central star and higher expansion velocities in [O III] than in [N II] lines. Images and high-resolution spectra from the literature are used in order to construct a 3-D model of the nebula using the morpho-kinematic code SHAPE. We find that two homologous expansion laws are needed for the [N II] and [O III] shell. We conclude that the internal velocity field of BD +30 3639 decreases with the distance from the central star at least between the [O III] and [N II] shells. A cylindrical velocity component is used to replicate the high-speed bipolar collimated outflows. We also present a new kinematic analysis technique called "distance mapping". It uses the observed proper motion vectors and the 3-D velocity field to generate maps that can be used as a constraint to the morpho-kinematic modeling with SHAPE as well as improve the accuracy for distance determination. It is applied to BD+30 3639 using 178 internal proper motion vectors from Li et al. (2002) and our 3-D velocity field to determine a distance of 1.52 \pm 0.21 kpc. Finally, we find evidence for an interaction between the eastern part of nebula and the ambient H2 molecular gas.
Akras Stavros
Steffen Will
No associations
LandOfFree
"Distance mapping" and the 3-D structure of BB +30 3639 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 "Distance mapping" and the 3-D structure of BB +30 3639, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and "Distance mapping" and the 3-D structure of BB +30 3639 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-348141