Ambitious assessment of galaxy formation simulations launched
Washington: A team of many astrophysicists have launched an ambitious new multiyear project - named AGORA (Assembling Galaxies of Resolved Anatomy) - to understand and resolve inconsistencies among different galaxy formation simulations.
The big challenge has been numerically modeling astrophysical processes over the vast range of size scales in the universe.
Supercomputer simulations are designed with three different size scales relevant to three different phenomena: star formation, galaxy formation, and the large scale structure of the universe.
Computational models of stars forming within galaxies commonly zoom in on giant molecular clouds in a volume of interstellar space tens of light-years across with a resolution (ability to distinguish details) smaller than the size of our solar system. At that scale, the computational models can take into account such details as the chemical composition of gas and dust, supernova explosions of nearby stars, and shock waves and turbulence in interstellar gas.
In contrast, cosmological simulations that trace the evolution of the cosmic web of from the Big Bang to the present day model volumes hundreds of millions of light-years across.
At such a gigantic scale, even the biggest supercomputers in the world have been limited to handling primarily simple gravitational interactions of dark matter, if the calculations are to be completed within reasonable time (months) and at affordable cost.
Lead author Ji-hoon Kim , a post-doctoral researcher at the University of California, Santa Cruz, who recently joined the California Institute of Technology, and who has been coordinating the AGORA project, said what they have been trying to achieve in the AGORA project is to apply the same fundamental rule of reproducibility to computational experiments.
He said that they will make sure that the galaxies one of them simulated are reproduced by our colleagues and if they are not reproduced, they will figure out why.
The study has been accepted for publication in The Astrophysical Journal Supplement.
More from India
More from World
More from Sports
More from Entertaiment
- Soldier buried under Siachen avalanche snow rescued after six days
- Panel discussion on demand for expulsion of Wahabi Syllabus from Universities- Part IV
- DNA: Analysis on India's naval prowess at International Fleet Review
- Panel discussion on demand for expulsion of Wahabi Syllabus from Universities
- Panel discussion on demand for expulsion of Wahabi Syllabus from Universities- Part II
- 12 men rape British teen girl for over 13 months; slapped with 140 years in jail
- 'Achhe din': Residents of PM Modi's adopted village to get free electricity, work in full swing
- Siachen survivor Lance Naik Hanumanthappa brought to Delhi, Army chief Dabir Singh visits RR hospital
- Deepika Padukone, Vin Diesel in first ‘xXx: The Return of Xander Cage’ video – Watch
- How Lance Naik Hanumanthappa survived 6 days below 25 feet of snow in Siachen