Gas Dynamical Simulations of the Large and Little Homunculus Nebulae of Eta Carinae

Details Gas Dynamical Simulations of the Large and Little Homunculus Nebulae of Eta Carinae Gas Dynamical Simulations of the Large and Little Homunculus Nebulae of Eta Carinae

2003-09-30

arxiv.org/abs/astro-ph/0310010v2

Astrophys.J.600:L59-L62,2003

Astronomy and Astrophysics

Astrophysics

ApJ Lett. in press

Scientific paper

10.1086/381390

We here present two-dimensional, time-dependent radiatively cooling hydrodynamical simulations of the large and little Homunculus nebulae around $\eta$ Carinae. We employ an alternative scenario to previous interacting stellar wind models which is supported by both theoretical and observational evidence, where a non-spherical outburst wind (with a latitudinal velocity dependence that matches the observations of the large Homunculus), which is expelled for 20 years, interacts with a pre-eruptive slow wind also with a toroidal density distribution, but with a much smaller equator-to-polar density contrast than that assumed in previous models. A second eruptive wind with spherical shape is ejected about 50 years after the first outburst, and causes the development of the little internal nebula. We find that, as a result of an appropriate combination of the parameters that control the degree of asymmetry of the interacting winds, we are able to produce not only the structure and kinematics of both Homunculus, but also the high-velocity equatorial ejecta. These arise from the impact between the non-spherical outburst and the pre-outburst winds in the equatorial plane.

Affiliated with

Also associated with

No associations

Rating

Gas Dynamical Simulations of the Large and Little Homunculus Nebulae of Eta Carinae 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 Gas Dynamical Simulations of the Large and Little Homunculus Nebulae of Eta Carinae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gas Dynamical Simulations of the Large and Little Homunculus Nebulae of Eta Carinae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-483886