Orbits of colliding galaxies |
| |
| Authors: | M Narasimha Rao Saleh Mohamed Alladin K S V S Narasimhan |
| |
| Institution: | (1) Vivek Vardhini College, Hyderabad and Centre of Advanced Study in Astronomy, Osmania University, 500 007 Hyderabad, India;(2) Inter-university Centre for Astronomy and Astrophysics, 411007 Pune, India |
| |
| Abstract: | A simple, semi-analytic method is developed for obtaining the orbits of galaxies undergoing fast collisions in which the galaxies are represented by Plummer models. The results are found to agree fairly well with those of N-body simulations.A simple formula for obtaining the angle of deflection is deduced. The maximum angle of deflection is 180° forV
p/V
esc(p)=1.00, about 36° forV
p/V
esc(p)=1.50, and about 18° forV
p/V
esc(p)=2.00, whereV
p is the velocity at closest approachp, andV
esc(p) is the parabolic velocity of escape atp. The angle of deflection of a pair of colliding elliptical galaxies without halos is about twice that for a pair of galaxies with halos for the same relative velocity at infinite separation. |
| |
| Keywords: | stellar systems: dynamics galaxies: interaction galaxies: orbits |
| 本文献已被 SpringerLink 等数据库收录！ |
|
