Over-eating may be to blame for bulges in Milky Way bar

A new simulation conducted on the world’s most powerful supercomputer dedicated to astronomy has produced a testable scenario to explain the appearance of the bar of the Milky Way.

Comparing this scenario to data from current and future space telescopes will help clarify the evolution of our home Galaxy.

Astronomy is revealing the structure of the Milky Way Galaxy in which we live in increasing detail.

We know that it is a disk galaxy, with two- or four- armed spirals, with a straight bar in the middle connecting the spirals.

Now, we also know that the inner part of the bar has a “peanut-shaped bulge,” places where the bar is thicker, sticking out above and below the mid plane of the Milky Way Galaxy and a “nuclear bulge,” which is disky and located in the central part of the Milky Way.

Some other galaxies, but not all, exhibit similar two-type bulges.

Like dieters who suddenly find bulges sticking out, astronomers asked the question, “How did the two-type bulges form?”

To answer this question a team led by Junichi Baba at the National Astronomical Observatory of Japan (NAOJ) simulated one possible scenario for a Milky-Way-like galaxy on “ATERUI II” at NAOJ, the world’s most powerful supercomputer dedicated to astronomy.

The team’s simulation is the most complete and accurate to date, including not only the stars in the galaxy, but also the gas.

It also incorporates the birth of new stars from the gas and the deaths of stars as supernovae.

The formation of a bar hel