What are galactic winds?

What are galactic winds?

Galactic winds are streams of high speed charged particles often observed blowing out of galaxies. For example, the starburst galaxy, M82, is undergoing a massive burst of star formation.

What causes galactic winds?

A galactic superwind, or just galactic wind, is a high velocity stellar wind emanating from either newly formed massive stars, spiral density waves, or as the result of the effects of supermassive black holes. They are normally observed in starburst galaxies.

What is a powerful wind called?

Short bursts of high speed wind are termed gusts. Strong winds of intermediate duration (around one minute) are termed squalls. Long-duration winds have various names associated with their average strength, such as breeze, gale, storm, and hurricane.

What triggers a starburst?

The burst itself may be triggered by a close encounter with another galaxy (such as M81/M82), a collision with another galaxy (such as the Antennae), or by another process which forces material into the centre of the galaxy (such as a stellar bar). The inside of the starburst is quite an extreme environment.

What causes calm winds?

Prevailing winds in the doldrums are very weak, and the weather is unusually calm. The ITCZ straddles the Equator. In fact, the low-pressure doldrums are created as the sun heats the equatorial region and causes air masses to rise and travel north and south.

What causes powerful wind?

A pressure gradient is how fast atmospheric pressure changes over distance. So, when pressure changes rapidly over a small distance, the pressure gradient force is large. Strong winds almost always result from large pressure gradients.

Is Centauri in the Milky Way?

Alpha Centauri is made up of three stars, the closest of which is only 4.22 light-years away. It is also an interesting place because it is considered one of the relatively few locations in the Milky Way that may offer conditions that are favorable to terrestrial life.