More than 50 dwarf galaxies surround the Milky Way (more), some of which have remained unchanged since their first founding 13 years ago. These incredible laboratories study very closely a slice of the universe at first, so discovering something new about them can have a big impact. A paper on nature astronomy does just that.
Astronomers have announced that the dwarf galaxy Tucana II has a much darker mass than previously thought suggesting a more complex history of the galaxy and helping us to understand how galaxies could evolve.
According to the top theory of the universe, five-sixths of all things in the universe do not interact with light – which is why it called dark matter. The dark matter does not seem to interact too much at all it does not stick. Seeing the gravitational interaction of galaxies, we can tell it there.
Typically, to estimate the size of a dark matter that illuminates a galaxy, one examines how the stellar clusters revolve around the center of the galaxy. Tucana II is an ultraviolet dwarf galaxy, so its shape is not an easy task. Astronomers discovered more new stars from the center than previously reported. This suggests that the galaxy contains much darker matter and weighs three to five times more than previously thought.
Chemical analysis of the second star of Tucana tells us that this dwarf galaxy is the most we have studied so far among it that it can made up of elements heavier than helium than stars. This is because since they die, they leave these heavy elements.
Typically, stars that are more primitive found around the center of a galaxy. However, observations that revealed a wider range of galaxies showed that the stars were more humans that are primitive. This counter-intuitive search provides a clue as to how the second Tucana developed.
“We are seeing the first sign of galactic normalization,” added Anna Frebel, an associate professor of physics at MIT. “A galaxy can eat one of its slightly smaller, more primitive neighbors, and then all of its stars spread out to the suburbs.” Observations show that the early galaxies of the universe spread the mass of matter, and the consolidation of galaxies began in space history.
