A new study conducted by the University of California, San Diego calculator Ethan Nadler shows that star formation can occur up to 10 million solar masses through molecular hydrogen cooling.
The Nadler calculated the fraction of darkness hallers that exceeded a critical mass necessary for star formation. Picture Loan: Xiaodian Chen.
It is thought that each galaxy is formed at the center of a darkness halay, which is a substance zone as a gravity that extends far beyond the visible boundaries of a galaxy.
The stars occur when gravity is gas in the dark matter hallers, but the astrophysicists do not yet know whether there are still darkness hallers.
“What is Halo mass threshold for the Galaxy Formation?” Dr. Nadler said.
“This question is the basis of the key research areas, including when and how the first galaxies were formed in the formation of galaxy and cosmology, where galaxies direct the cosmic reionization of galaxies, and whether there are ‘dark’ (galaxies).”
“Robust forecasts for the Galaxy formation threshold are critical when the upcoming observations of weak galaxies and low -mass hallers throughout the cosmic history are taken into consideration.”
In his new work, Dr. Nadler calculated the audience that the haller could not form a stars.
His work was carried out using Galaxy formation theory and analytical estimates from cosmological simulations.
Nadler said, “Historically, our understanding of dark matter was associated with his behavior in galaxies,” he said.
“The detection of completely dark halves would open a new window to examine the universe.”
Previously, this threshold for star formation was thought to be 100 million to 1 billion solar mass due to the cooling of atomic hydrogen gas.
The current study shows that star formation can occur in cases up to 10 million solar masses through molecular hydrogen cooling.
Nadler, “Rubin Observatory in the future of this year online, and while making unprecedented observations of our universe of our universe, will soon test these forecasts and to reveal whether the existence of completely dark situations will be new data,” he said.
“This may have extensive consequences for cosmology and the nature of dark matter.”
. to work Visible inside Astrophysical Magazine Letters.
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Ethan O. Nadler. 2025. Effect of molecular hydrogen on the galaxy formation threshold. APJL 983, L23; doi: 10.3847/2041-8213/adbc6e
