is one which has 100 or more times the mass of the sun.
Washington, March 13 ( ANI ): Researchers using ESO's Very Large Telescope Interferometer (VLTI) have found the largest yellow hypergiant
star HR 5171 A - 1300 times the diameter of the Sun and much bigger than was expected.
86 billion miles in diameter and it is classified as a red hypergiant
Paul Crowther, a professor of astrophysics at England's University of Sheffield, led the study of the star cluster where the newly discovered hypergiant
Using the new data, the team calculated that Rho Cassiopeiae and other so-called yellow hypergiant
stars periodically blow out gargantuan amounts of mass.
At a distance of about 13 000 light-years from Earth, it is the closest yellow hypergiant found to date and new observations show it shines some 500 000 times more brightly than the Sun.
This object was known to glow brightly in the infrared but, surprisingly, nobody had identified it as a yellow hypergiant before," said Eric Lagadec (European Southern Observatory), who led the team that produced the new discovery.
It is what is called a red hypergiant
- a highly evolved object that is exhausting its nuclear fuel.
Today, they are considered as the explosion of all hypergiants
, or stars with a mass of between 100 and 300 times that of the sun.