New findings indicate that intense and mysterious bursts of radiation originate from neutron star mergers that occurred in the early universe.
O'Conner and his fellow researchers started work by first examining data about 120 gamma-ray bursts observed by two instruments aboard NASA'sAfter Swift's Burst Alert Telescope detects a gamma-ray burst, the observatory's X-ray Telescope uses the burst's X-ray afterglow to trace its location. Following this, more accurate locations for the gamma-ray bursts are obtained by the Lowell Observatory.
Studies involving these afterglows have found 43 short gamma-ray bursts that do not appear to be associated with a galaxy and instead look as if they originated from relatively empty"These hostless gamma-ray bursts presented an intriguing mystery, and astronomers had proposed two explanations for their seemingly isolated existence," O'Conner said. in a distant galaxy and then drifting together into interstellar space. They eventually merge billions of years later.
Another idea — and the one O'Connor and his colleagues focused on testing — is that the neutron star mergers that launched these seemingly isolated gamma-ray bursts actually occurred billions of light-years away, and thus long ago, when the universe was just around 3.8 billion years old. Because of this incredible distance, the origin galaxies now appear extremely faint from our position on Earth.
"We felt this second scenario was the most plausible to explain a large fraction of hostless events," said O'Connor."We then used the most powerful telescopes on Earth to collect deep images of the gamma-ray burst locations and uncovered otherwise invisible galaxies 8 to 10 billion light-years away from Earth."
日本 最新ニュース, 日本 見出し
Similar News:他のニュース ソースから収集した、これに似たニュース記事を読むこともできます。
Outside review planned for New York's COVID-19 response - New York Amsterdam NewsA third-party auditor will review the New York state government’s response to the COVID-19 pandemic, including efforts by the administration of the previous governor to downplay the number of deaths of nursing home residents. The state plans to [...]
続きを読む »
What to know about the new rare polio case in New YorkA polio case in a young unvaccinated adult in New York reminds of a horrible virus that once plagued the US and the world.
続きを読む »
China Attaches New Section Onto Its Brand New Space StationChina has added a new science laboratory module dubbed Wentian to its growing space station this week, an impressive feat.
続きを読む »
A New Predictor of Problem Drinking in Early AdulthoodSolitary drinking in adolescence and young adulthood is a strong predictor of alcohol use disorder by age 35, results of a new longitudinal study show.
続きを読む »
New 'Illinois Cares for Kids' campaign encourages early childhood enrollmentIllinois launched a new statewide enrollment campaign for childcare and early education services called 'I Got Love' or 'Siento Amor' Tuesday.
続きを読む »