A crew of astrophysicists analyzed photographs from the James Webb House Telescope and located three shiny objects that may be “darkish stars.”
Stars beam brightly out of the darkness of area due to fusion, atoms melding collectively and releasing power. However what if there’s one other technique to energy a star?
“…consider it or not, one darkish star has sufficient gentle to compete with a whole galaxy of stars.”
Darkish stars, theoretical objects a lot greater and brighter than our solar, powered by particles of darkish matter annihilating. If confirmed, darkish stars may reveal the nature of darkish matter, one of many deepest unsolved issues in all of physics.
“Discovering a brand new kind of star is fairly fascinating all by itself, however discovering it’s darkish matter that’s powering this—that might be big,” says Katherine Freese, director of the Weinberg Institute for Theoretical Physics and a chair in physics on the College of Texas at Austin.
Though darkish matter makes up about 25% of the universe, its nature has eluded scientists. Scientists consider it consists of a brand new kind of elementary particle, and the hunt to detect such particles is on. Among the many main candidates are Weakly Interacting Huge Particles. After they collide, these particles annihilate themselves, depositing warmth into collapsing clouds of hydrogen and changing them into brightly shining darkish stars. The identification of supermassive darkish stars would open up the potential for studying in regards to the darkish matter primarily based on their noticed properties.
The analysis seems within the Proceedings of the National Academy of Sciences. Together with Freese, Cosmin Ilie and Jillian Paulin each at Colgate College are examine coauthors.
Observe-up observations from the James Webb House Telescope (JWST) of the objects’ spectroscopic properties—together with dips or extra of sunshine depth in sure frequency bands—may assist affirm whether or not these candidate objects are certainly darkish stars.
Confirming the existence of darkish stars may additionally assist clear up an issue created by JWST: There appear to be too many giant galaxies too early within the universe to suit the predictions of the usual mannequin of cosmology.
“It’s extra possible that one thing inside the usual mannequin wants tuning, as a result of proposing one thing totally new, as we did, is all the time much less possible,” Freese says. “But when a few of these objects that appear to be early galaxies are literally darkish stars, the simulations of galaxy formation agree higher with observations.”
The three candidate darkish stars (JADES-GS-z13-0, JADES-GS-z12-0, and JADES-GS-z11-0) had been initially recognized as galaxies in December 2022 by the JWST Superior Deep Extragalactic Survey (JADES). Utilizing spectroscopic evaluation, the JADES crew confirmed the objects had been noticed at occasions starting from about 320 million to 400 million years after the Large Bang, making them a number of the earliest objects ever seen.
“Once we take a look at the James Webb knowledge, there are two competing potentialities for these objects,” Freese says. “One is that they’re galaxies containing hundreds of thousands of peculiar, population-III stars. The opposite is that they’re darkish stars. And consider it or not, one darkish star has sufficient gentle to compete with a whole galaxy of stars.”
Darkish stars may theoretically develop to be a number of million occasions the mass of our solar and as much as 10 billion occasions as shiny because the solar.
The concept for darkish stars originated in a collection of conversations between Freese and Doug Spolyar, on the time a graduate scholar on the College of California, Santa Cruz. They questioned: What does darkish matter do to the primary stars to kind within the universe? Then they reached out to Paolo Gondolo, an astrophysicist on the College of Utah, who joined the crew. After a number of years of improvement, they revealed their first paper on this idea within the journal Physical Review Letters in 2008.
Funding for this analysis got here from the US Division of Vitality’s Workplace of Excessive Vitality Physics program and the Vetenskapsradet (Swedish Analysis Council) on the Oskar Klein Centre for Cosmoparticle Physics at Stockholm College.
Supply: UT Austin
