#astronomy Uncommon luminous blue variable gives stellar spectacle for Hubble anniversary – Astronomy Now

April 30, 2021 - Comment

Marking the Hubble Area Telescope’s 31st yr in area, astronomers centered on AG Carinae, a uncommon luminous blue variable with as much as 70 instances the mass of the Solar and 1,000,000 instances the luminosity. One of many brightest stars within the Milky Approach, AG Carinae is considered one of solely about 50 luminous blue


Marking the Hubble Area Telescope’s 31st yr in area, astronomers centered on AG Carinae, a uncommon luminous blue variable with as much as 70 instances the mass of the Solar and 1,000,000 instances the luminosity. One of many brightest stars within the Milky Approach, AG Carinae is considered one of solely about 50 luminous blue variables within the native group of close by galaxies. Like its brethren, it’ll reside quick and die younger, burning by its nuclear gasoline at a prodigious price to generate the outward strain wanted to offset the inward crush of gravity. About 10,000 years in the past, the star skilled a titanic eruption, blowing off its outer layers and making a spectacular cloud of particles now some 5 mild years throughout containing roughly 10 instances the mass of the Solar. Such outbursts happen a few times within the brief lifetime of a luminous blue variable, a results of the fixed tug-of-war between gravity and the radiation strain generated by nuclear fusion in its core. When the gasoline runs out and fusion lastly halts, the core doubtless will implode in a supernova blast.

AG Carinae. Picture: NASA, ESA, STScI

A video produced by NASA’s Goddard Area Flight Heart highlights the Hubble commentary and appears again on 31 years in area:



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