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Home Astronomy

Watch a 180-year-old stellar eruption unfold in new time-lapse film (video)

September 27, 2023
in Astronomy
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Watch a 180-year-old stellar eruption unfold in new time-lapse film (video)
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Utilizing over 20 years of knowledge from NASA’s Chandra X-ray Observatory, astronomers have crafted a shocking new video of a stellar eruption that came about some 180 years in the past. 

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The time-lapse video makes use of Chandra observations from 1999, 2003, 2009, 2014 and 2020 — together with information from ESA’s XMM-Newton spacecraft — and retraces the historical past of the stellar explosion often known as Eta Carinae. This well-known star system incorporates two huge stars. A kind of stars is about 90 instances extra huge than the solar, scientists say, whereas the opposite is  about 30 instances extra huge than the solar. 

The large explosion, dubbed the “Nice Eruption, got here from Eta Carinae. It’s believed to be the results of a merger between two stars that initially belonged to a triple star system. The aftermath of the collision was witnessed on Earth within the mid-Nineteenth century, and the brand new video reveals how the stellar eruption has since continued to quickly develop into house at speeds reaching as much as 4.5 million miles per hour , in keeping with a statement from NASA. 

Associated: Eta Carinae’s epic supernova explosion involves life in new visualization 

“Throughout this occasion, Eta Carinae ejected between 10 and 45 instances the mass of the solar,” NASA officers stated within the assertion. “This materials grew to become a dense pair of spherical clouds of gasoline, now known as the Homunculus Nebula, on reverse sides of the 2 stars.” 

The Homunculus Nebula is the intense blue cloud on the middle of the picture, fueled by high-energy X-rays produced by the 2 huge stars, that are too near be noticed individually. They’re surrounded by a vibrant orange ring of X-ray emissions that seem to develop and develop quickly over time. 

“The brand new film of Chandra, plus a deep, summed picture generated by including the information collectively, reveal necessary hints about Eta Carinae’s unstable historical past,” NASA officers stated within the assertion. “This consists of the fast growth of the ring, and a previously-unknown faint shell of X-rays outdoors it.”

side by side images of stellar explosions

Observations from NASA’s Chandra X-ray Observatory present how the faint X-ray shell surrounding Eta Carinae has expanded over time.  (Picture credit score: NASA/SAO/GSFC/M. Corcoran et al.)

The faint X-ray shell is printed within the picture above, displaying that it has an identical form and orientation to the Homunculus nebula, which suggests each constructions have a typical origin, in keeping with the assertion. 

Primarily based on the movement of clumps of gasoline, astronomers consider  the stellar materials was blasted away from Eta Carinae someday between the years 1200 and 1800 — effectively earlier than the Nice Eruption was noticed in 1843. Because the blast prolonged into house, it collided with interstellar materials in its path. The collision then heated the fabric, creating the intense X-ray ring noticed. Nevertheless, the blast wave has now traveled past the ring, given the X-ray brightness of Eta Carinae has pale with time, scientists stated. 

Their findings on Eta Carinae’s growth have been published in a 2022 study within the Astrophysical Journal. 

“We’ve interpreted this faint X-ray shell because the blast wave from the Nice Eruption within the 1840s,” Michael Corcoran at NASA’s Goddard Area Flight Middle in Greenbelt, Maryland, who led the research, stated in a statement from the Chandra X-ray Observatory. “It tells an necessary a part of Eta Carinae’s backstory that we wouldn’t in any other case have recognized.”



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