Gas Rich Mergers and Disk Galaxy Formation

Mergers of galaxies are common in their evolution. This movie shows the evolution
of a galaxy with similar mass to our own Milky Way, commencing shortly after the Big Bang. The simulation is in a fully cosmological setting, according to our knowledge of Big Bang cosmology.
This particular galaxy has a rich merging history, including a major merger at redshift of ~1, i.e. at a time when the Universe was almost half
its current age. A large disk reforms from gas left over after the merger, and from subsequent gaseous accretion.

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  Science & Technology

[LessDoumas]

Depends on speed, mass and distance but they eventually collide the same way. The galaxies are torn apart but manage to recapture most of their stars (and dust). Galaxy mergers are also a perfect place for star formation (by creating instabilities in dust clouds).

Our Milky Way will eventually merge with the Andromeda Galaxy around which it currently "orbits". The merging will happen in a similar fashion.

[LessDoumas]

The Ring nebula is the result of the "explosion" of a Red Giant (more precisely the outer layers of the star are expelled when it becomes a White Dwarf).

[Ajuleg]

Фигня. Всё не так. И я рад, что 15 человек, кроме меня, это понимают.

[z356]

Nahh, my universe is better than yours!

[z356]

Any high-resolution version available? TIA

[MrKastila]

Wonderful!

[dreamdimensions]

beaut, will comment review later

[ChappyBT]

Probably not, in fact it may be the other way around. Almost all elliptical galaxies are older and more massive than spiral ones, they are some the oldest galaxies in the universe, so the spiral galaxies will probably become elliptical after more mergers.

[FASELstudios]

this comment is so stupid...

[BillyB4d4ss]

... hmm.

It's neither a picture or the right day.

[ghostcrab311]

It looks, however, like the galaxy is not spinning with a flat rotation curve. One would need to account for that to really have a good simulation.

[CJoke Oh]

the universe is a disc