Why 'starbursts' take place when galaxies collide
Researchers have for the first time explained a long standing mystery
The new simulations were made using two of the most powerful supercomputers in Europe.
The scientists, led by Florent Renaud of the AIM institute near Paris in France modeled a galaxy like our own Milky Way and the two colliding Antennae galaxies.
For the Milky Way type galaxy, the astrophysicists used 12 million hours of time on the supercomputer Curie, running over a period of 12 months to simulate conditions across 300,000 light-years.
For the Antennae type system, the scientists used the supercomputer SuperMUC to cover 600,000 light-years.
With these enormous computing resources the team were able to model the systems in great detail, investigating details that were only a fraction of a light-year across.
By simulating the impact of the Antennae collision and merger on material 1,000 times less massive than anything attempted before and comparing this with the Milky Way model, Florent and his team were able to demonstrate that the collision changes the nature of the turbulence in the galactic gas.
Instead of whirling around, the gas enters a state where compression is more likely. So when two galaxies collide, this generates an excess of dense gas that collapses into stars -- and both galaxies experience a starburst.
The study has been published in the journal Monthly Notices of the Royal Astronomical Society.
(Posted on 13-05-2014)
Information on States of India:
Andaman Nicobar | Andhra Pradesh | Arunachal Pradesh | Assam | Bihar | Chandigarh | Chhattisgarh | Dadar Nagar Haveli | Daman Diu | Delhi | Goa | Gujarat | Haryana | Himachal Pradesh | Jammu Kashmir | Jharkhand | Karnataka | Kerala | Lakshadweep | Madhya Pradesh | Maharashtra | Manipur | Meghalaya | Mizoram | Nagaland | Orissa | Pondicherry | Punjab | Rajasthan | Sikkim | Tamil Nadu | Tripura | Uttar Pradesh | Uttaranchal | West Bengal
INDIA REGIONAL MAPS:
Andhra Pradesh Travel Map | Bihar Travel Map | Goa Travel Map | Gujarat Travel Map | Haryana Travel Map | Himachal Pradesh Map | Karnataka Travel Map | Kerala Travel Map | Maharashtra Travel Map | Punjab Travel Map | Rajasthan Travel Map | Sikkim Travel Map | Tamil Nadu Travel Map | Uttar Pradesh Travel Map | West Bengal Travel Map |
KERALA TRAVEL MAPS:
TRAVEL MAPS OF INDIA:
INDIA CITY MAPS: