Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-06-14
Astronomy and Astrophysics
Astrophysics
MNRAS style file, 6 pages. 7 eps figures are not included but are available individually at http://axp2.ast.man.ac.uk:8000/Pre
Scientific paper
Spatially resolved H$\alpha$ and [N{\sc ii}] line profiles have been obtained over striking features in the outer regions of the Eta Carinae nebula. The highly irregular outer `shell' of low ionization, [N{\sc ii}] bright, knots has been shown to exhibit radial velocities between -1200 and +300 km/s with respect to the systemic radial velocity, over its perimeter. Furthermore, several knots have been found which appear to emit only in the H$\alpha$ line with radial velocities up to -1450 km/s. However, the most intriguing features are a narrow `spike' that projects through this outer shell and a faint `arc' of emission that extends well beyond it. The `spike', which exhibits a change of radial velocity along its length, could be a narrow collimated jet with an outflow velocity of > 1000 km/s. In one interpretation the `arc' is modelled by a conical outflow and mechanisms for generating [N{\sc ii}] emission from highly supersonic gas are also discussed.
Boumis Panayotis
Bryce Myfanwy
Holloway A. J.
Meaburn John
Steffen Will
No associations
LandOfFree
Highly supersonic motions within the outer features of the Eta Carinae nebulosity 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 Highly supersonic motions within the outer features of the Eta Carinae nebulosity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Highly supersonic motions within the outer features of the Eta Carinae nebulosity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-189442