Astronomers observe galactic winds for first time - study
NEW YORK. KAZINFORM - Astronomers have gotten a peek into the early stages of the formation of a supermassive galaxy caused by a collision between two smaller galaxies and have begun to detail the accompanying spectacular celestial phenomena, Sputnik reports.
Space is often thought of as a cold, dead void with no atmosphere where everything either floats motionless or moves so fast that we won’t know about it until it takes us out. Recent astronomical observations, however, now offer proof that cosmic mechanics can cause galactic winds that span billions of light years.
Research published in the Natural Astronomy journal details observations of a distant galaxy called SDSS J211824.06+001729.4, nicknamed Makani after the Hawaiian word for ‘wind,’ made using the Keck Cosmic Web Imager. Makani is actually not one, but two galaxies which collided billions of years ago.
When galaxies collide, enormous amounts of gas become compress, leading to the creation of massive new stars – a phenomenon known as a ‘starburst.’ The collision itself, the star formation and exploding supernovas, create massive outbursts of hot ionized gas, notes astrophysicist Alison Coil of UC San Diego.
And by ‘massive,’ they mean 4,900 square kiloparsecs, or roughly 52-billion square light-years. That is a lot of gas.
What makes it more remarkable is that the ionized gas is very hot oxygen, astronomers assert, adding that gas temperatures can reach up to 10,000 degrees Kelvin (about 9726.85 degrees Celsius or 9726.85 degrees Fahrenheit).
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