Astronomers find spiral stars at the center of a star cluster

NASA’s Hubble has discovered young stars rising to the center of a massive group of stars in the Small Magellanic Cloud. The outer arm of the spiral in this massive, oddly shaped stellar nursery called NGC 346 may be fueling star formation in a river-like motion of gas and stars.

The chemical composition of the Small Magellanic Cloud is simpler than that of the Milky Way. They are similar to galaxies in the smaller universe, where heavy elements are much rarer. Because of this, the stars in the Small Magellanic Cloud burn higher and run out of fuel faster than in our Milky Way.

Understanding how stars form in the Small Magellanic Cloud provides a new perspective on how a starburst occurred so early in the history of the universe.

The new study suggests that Stars form in the Small Magellanic Cloud It is similar to the one in our galaxy, the Milky Way.

NGC 346 has a diameter of 150 light years. Its mass is 50,000 suns. Astronomers have, until now, been puzzled by their intriguing shape and rapid star formation rate. To reveal the behavior of this puzzle, they used data from NASA’s Hubble Space Telescope and the European Southern Observatory’s Very Large Telescope (VLT).

Study leader Elena Sabi of the Space Telescope Science Institute in Baltimore said, “The stars are the machines that are sculpted Universe. Without stars, we wouldn’t have life, but we don’t fully understand how they form. We have many models making predictions, and some of these predictions are contradictory. We want to determine what regulates star formation because these are also the laws we need to understand what we see in early universe. “

Scientists have observed the motion of stars in NGC 346 in two different ways:

1. They used Hubble to measure changes in the positions of stars over an 11-year period. The stars in this region move at an average speed of 2,000 miles per hour, which means that in 11 years, they will be moving 200 million miles.

2. Using the ground-based VLT’s Multi-Unit Spectrograph (MUSE) instrument, they measured the radial velocity, and determined whether the object was approaching or receding from the observer.

Zeidler said, “What’s amazing is that we used two completely different methods with different facilities and came up with the same result, regardless of each other. With Hubble, you can see stars, but with MUSE we can also see the movement of gas in the third dimension, and this confirms the theory that everything escalates into Inside. “

new He saidAnd the “The Hubble archive is a goldmine. There are many interesting star-forming regions that Hubble has observed over the years. Given that Hubble has performed very well, we can actually replicate these observations. This could advance our understanding of star formation.”

Journal reference:

  1. Peter Zeidler, Elena Sabi and Antonella Nota. Inner line-of-sight kinetics of NGC 346: rotation of the core region. 2022 Astrophysical Journal. DOI: 10.3847 / 1538-4357 / ac8004