Astronomers made the role of cosmic archeologists, using the Jameb Webb Space telescope (JWST) to waste more than 100 billion years ago. Like artifacts in the world speaking the story of human race, these galaxies can tell the story of our galaxy, the Milky Way.
The purpose of this investigation is to discover why galaxies want The Milky Way Built in thick disks of stars with distorted thin stellar disks. Each of these disks has its own breed Popelar in Popllar with one’s own movement.
The team behind this research wants to know how and why this “dual-disk” structure forms in the world. It represents the world’s structure, as early as 2.8 billion years after The Big Bang.
“This unique measurement of thicknesses of disks in high redshiftor occasionally in the first universe, a benchmark for theoretical study possible only in JWST“Team Leader Takafumi Tsukui in Australian National University A statement says. “Often, older, thick daw stars are faint, and young, thin dumps of disk outshine in full galaxy.
“But with JWST’s resolution and unique ability to see through dust and highlight weak stars, we can identify two disk structures in galaxies and measure their thickness.”
Speaking of Milky Way History
The first step for the team is to separate 111 sample galaxies into two categories: dual-changed and randomly.
Its revealed is that galaxies grow their thick stellar disk First, with thin disk forming the later point.
The team thinks in time of these disk formation processes of mass mass of the galaxy in question. High-mass, single-disk galaxies move to dual-disk structures by forming an embedded thin disk about 8 billion years ago at the age of 14-billion first universe. Mass-mass galaxies seem to undergo this change when they are about 4 billion years of age.
“This is the first time it is possible to solve thin stellar disks at higher redshift. What is the real novel to start school,” Emily Wisnar Member and a researcher of the National National University, as the statement. “To find thin stellar disks in place 8 billion years ago, or even earlier, surprising.”
Team then seeks to determine what causes transitions for this different types of galaxies. To do this, researchers have exceeded their sample of 111 galaxies to investigate how gas flow around the subjects.
They use gas-motion data from Atacama large millimeter / submillimeter row (Alma) – a collection of 66 Antennas in Northern Chile to work together as a telescope – and other land-based observations.
It shows the rough gas to Early universe triggered bout to Severe star building In galaxies, these galaxies are born ‘thick stellar disks. As these star stars on the disk, gas reinforced, which is less disturbed and thin. To lead to the formation of embedded thin stellar disk.
This process, the team says, requires different time with high-mass galaxies and gales of low-mass because the former gas converted to stars is more efficient than the last. That means that gas consumes faster than high-mass galaxies, which gets it at the point where their thin stellar disks will be easier.
These links to our own galaxy as well. The time of these shifts equal to the period in which the milky passage is related to raised its own thin disk in the stars.
All of all, the team’s research shows the ability to come in time and finding galaxies that motivate the evolution of our galaxy, which allows galaxies to act as the galaxies that speak the story of the Milky Way.
The next step for this research will include team adding additional data to determine if the relationships they still see standing.
“There’s more we want to check,” Tsukui said. “We want to add the type of information that people usually get for adjacent galaxies, such as stellar motion, age and metal more heavy than hydrogen and helium).
“By doing this, we can bridge eyes from galaxies near and far, and destroy our understanding of disk formation.”
Team results appear in the July Journal edition Monthly notifications of Royal Atronomical society.
