Menzel 3:: Dissecting the ant

被引:40
作者
Santander-García, M
Corradi, RLM
Balick, B
Mampaso, A
机构
[1] Inst Astrofis Canarias, Tenerife 38200, Spain
[2] Isaac Newton Grp Telescopes, Santa Cruz de La Palma 38700, Spain
[3] Univ Washington, Dept Astron, Seattle, WA 98195 USA
关键词
ISM : planetary nebulae : individual : Mz 3; ISM : kinematics and dynamics;
D O I
10.1051/0004-6361:20041147
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The structure and kinematics of the bipolar nebula Mz 3 have been investigated by means of HST, CTIO and ESO images and spectra. At least four distinct outflows have been identified which, from the inside to the outside, are the following: a pair of bright bipolar lobes, two opposite highly collimated column-shaped outflows, a conical system of radial structure, and a very dim, previously unnoticed, low-latitude and flattened (ring-like) radial outflow. A simple Hubble-law describes the velocity field of the ballisticaly expanding lobes, columns and rays, suggesting that their shaping has being done at very early stages of evolution, in a sort of eruptive events with increasing degree of collimation and expansion ages ranging from similar to600 for the inner structures to similar to1600 years (per kpc to the nebula) for the largest ones.
引用
收藏
页码:185 / 194
页数:10
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