Image

Other Research Groups

Useful Books and Papers and websites.
User avatar
Shahram
Posts: 313
Joined: Sun Feb 05, 2017 8:31 am

Other Research Groups

Postby Shahram » Sun Feb 05, 2017 5:49 pm




User avatar
Shahram
Posts: 313
Joined: Sun Feb 05, 2017 8:31 am

Re: Other Research Groups

Postby Shahram » Fri Feb 17, 2017 9:58 pm

The Advanced Visualization Laboratory (AVL) at the National Center for Supercomputing Applications (NCSA) collaborated with NASA and Drs. Brant Robertson and Lars Hernquist to visualize two colliding galaxies that interact and merge into a single elliptical galaxy over a period spanning two billion years of evolution.

Link and video:
https://svs.gsfc.nasa.gov/10687



User avatar
Shahram
Posts: 313
Joined: Sun Feb 05, 2017 8:31 am

Re: Other Research Groups

Postby Shahram » Fri Feb 17, 2017 10:16 pm

Sample Simulations video (Mainly by Advanced Visualization Laboratory (AVL))

Galaxy colliding and merging simulations video:

Milky Way and Andromeda Galaxies Collision
https://www.nasa.gov/mp4/654254main_v1220j_H264l.mp4

https://www.nasa.gov/mission_pages/hubble/science/milky-way-collide.html

Galaxy Formation:
https://svs.gsfc.nasa.gov/11534


Merging galaxies and creating AGN:
https://www.youtube.com/watch?v=FMPuujaldZk


Mega Galaxy Merger Simulation / ESA / NASA / Hershel Space Observatory / Infrared:
http://www.jpl.nasa.gov/video/details.php?id=1218

Galaxy Collisions: Simulation vs Observations:
https://svs.gsfc.nasa.gov/30686

Image



User avatar
Shahram
Posts: 313
Joined: Sun Feb 05, 2017 8:31 am

Re: Other Research Groups

Postby Shahram » Wed Mar 01, 2017 10:58 pm

The EAGLE Project

EAGLE (Evolution and Assembly of GaLaxies and their Environments) is a simulation aimed at understanding how galaxies form and evolve. This computer calculation models the formation of structures in a cosmological volume, 100 Megaparsecs on a side (over 300 million light-years). This is large enough to contain 10,000 galaxies of the size of the Milky Way or bigger, enabling a comparison with the whole zoo of galaxies visible in the Hubble Deep field for example. This website contains downloadable images and movies, many of which are located in Highlights or Downloads.

The simulation starts when the Universe is still very uniform - no stars nor galaxies had formed yet - with cosmological parameters motivated by observations by the Planck satellite of the cosmic microwave background. Crucial parameters are the density of dark matter - which allows structures to grow, baryonic matter - the gas from which stars form, and the cosmological constant - responsible for cosmic acceleration.

Dark matter enables structures like galaxies to form, even while the Universe is expanding rapidly. Gas falling into these dark matter structures cools and forms stars: this is how galaxies form. However core collapse supernovae, exploding massive stars, and AGN (Active Galactic Nuclei), bursting supermassive black holes, severely limit what fraction of the gas forms stars. The devastating effects of these explosions can be directly seen in starburst galaxies such as M82 and massive galaxies such as those in the Perseus cluster. Modelling these aspects accurately is key to produce a virtual universe that looks like the real one.


http://icc.dur.ac.uk/Eagle/

Image



User avatar
Shahram
Posts: 313
Joined: Sun Feb 05, 2017 8:31 am

Re: Other Research Groups

Postby Shahram » Wed Mar 01, 2017 11:06 pm




User avatar
Shahram
Posts: 313
Joined: Sun Feb 05, 2017 8:31 am

Re: Other Research Groups

Postby Shahram » Sat Mar 11, 2017 6:54 pm

Galaxy Dynamics and Cosmology on Mckenzie by John Dubinski

http://www.cita.utoronto.ca/~dubinski/nbody/

Image



User avatar
Shahram
Posts: 313
Joined: Sun Feb 05, 2017 8:31 am

Re: Other Research Groups

Postby Shahram » Sat Mar 11, 2017 11:55 pm

The Bolshoi Simulation:
The Bolshoi simulation is the most accurate cosmological simulation of the evolution of the large-scale structure of the universe yet made (“bolshoi” is the Russian word for “great” or “grand”). The first two of a series of research papers describing Bolshoi and its implications have been accepted for publication in the Astrophysical Journal. The first data release of Bolshoi outputs, including output from Bolshoi and also the BigBolshoi or MultiDark simulation of a volume 64 times bigger than Bolshoi, has just been made publicly available to the world’s astronomers and astrophysicists.

The starting point for Bolshoi was the best ground- and space-based observations, including NASA’s long-running and highly successful WMAP Explorer mission that has been mapping the light of the Big Bang in the entire sky. One of the world's fastest supercomputers then calculated the evolution of a typical region of the universe a billion light years across. The Bolshoi simulation took 6 million cpu hours to run on the Pleiades supercomputer—recently ranked as seventh fastest of the world’s top 500 supercomputers—at NASA Ames Research Center.

Large cosmological simulations such as the Millennium simulation are now the basis for much current research on the structure of the universe and the evolution of galaxies and clusters of galaxies. Due to significant advances in the measurement of the cosmological parameters and in the power and speed of supercomputers and simulation codes over the past half-decade since the Millennium cosmological simulation, the Bolshoi simulation is substantially better in resolution and accuracy. The Principal Investigators of the Bolshoi project, Anatoly Klypin and Joel Primack, and their colleagues anticipate that Bolshoi will become cosmology’s new benchmark simulation for making theoretical predictions that can then be tested against data gathered by observational astronomers. One of the first such predictions was the fraction of Milky Way type galaxies with satellite galaxies as bright as our galaxy's Large and Small Magellanic Clouds; the results were in excellent agreement with observations from the Sloan Digital Sky Survey.

http://hipacc.ucsc.edu/Bolshoi/



User avatar
Shahram
Posts: 313
Joined: Sun Feb 05, 2017 8:31 am

Re: Other Research Groups

Postby Shahram » Sat Jun 10, 2017 9:33 am

Institute for Computational Science of the UZH.

Researchers from the University of Zurich have simulated the formation of our entire universe with a large supercomputer. A gigantic catalogue of about 25 billion virtual galaxies has been generated from 2 trillion digital particles. This catalogue is being used to calibrate the experiments on board the Euclid satellite, that will be launched in 2020 with the objective of investigating the nature of dark matter and dark energy.



https://phys.org/news/2017-06-largest-virtual-universe-simulated.html
Image




Return to “Resourses”

Who is online

Users browsing this forum: No registered users and 1 guest