A large red star was captured in the latter part of his life emitting rings like foreign smoke for the first time.
The star, named V Hydrae, is about 1,300 light -years from Earth, and is an asymptotic giant branch (AGB) star. He was a star who had reached the last stage of his red giant era before falling into a white dwarf.
Observing the nature of such stars will help astronomers understand what lies ahead in the later stages of the stellar death process.
Astronomers have previously seen those stars in this region pull matter from their cores and release it into the surrounding space.
This expulsion follows the findings of a team of scientists from NASA’s Jet Propulsion Laboratory in California and the University of California, Los Angeles, who observed the V Hydrae using the Atacama Large Millimeter / submillimeter Array ( ALMA) and the Hubble Space Telescope. .
They found that the star was melting six disks and two different types of internal glass clocks, which are now known to combine helium with carbon.
Stars during the normal course of their lives combine hydrogen into helium. The time when hydrogen runs out marks the beginning of the red mass, where the star is seen burning helium and making it from carbon. At the AGB level, the stars are also moving slowly in their helium storage, which is what makes V Hydrae.
“Our research confirms the traditional way in which AGB stars die – through the release of fuel by slow, solid, spherical winds over 100,000 years or more. – better, incomplete, or worse, not right, “he said. Lead author Raghvendra Sahai, an astronomer at NASA’s Jet Propulsion Laboratory in California, said in a statement.
Astronomers are shocked that V Hydrae burned “smoke rings” (rings of earth) in the gaseous atmosphere only, added author and astronomer Mark Morris of the University of California, Los Angeles in the same language.
This finding is important, because more than 90% of stars with a large number of suns (or more) become AGB when they lose the ability to develop. to energy through the nuclear compound.
“The final stage of stellar evolution – when stars change from red to end up as a white dwarf stellar remnant – is a complex process that is not clear,” Morris said.
“Knowing that this process can involve ejections of gas rings, at the same time as the action of fast, intermittent jets of matter, brings a new wrinkle and exciting we seek the death of the stars. “
The two glass clock-like clouds and a new “jet-like structure” fly from the star at half a million mph (240 km per second.)
Clouds are no longer like the clock in science, because astronomers have already seen a variety of stars melting in the sky, such as the Southern Crab Nebula.
V Hydrae has been known to release tanks of hot gas, or plasma, about every 8.5 years, and scientists believe that one of its characteristics is related to a companion star. But his life was not confirmed. .
“Every time we watch V Hydrae with new visual effects, it becomes more like a circus, characterized by more and more formal performances,” Sahai said. “V Hydrae made us happy with his rings and his performances, and because we had our own day one day with the same outcome, we were watched a lot.”
An article about the research was published in The Astrophysical Journal. Image control is available on the arXiv pre -print server.