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Mysterious 'blue lurker' stars 5nvklj





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Mysterious 'blue lurker' stars

Dragon
Dragon
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Mysterious 'blue lurker' stars Empty Mysterious 'blue lurker' stars

Post by Dragon Sat Jan 15, 2022 1:00 am

When astronomers discovered a new kind of star just a few years ago, they were puzzled: The stars were spinning far too quickly given their age.

Nicknamed "blue lurkers," these stars hid for decades within clusters of other stars.

Now, thanks to new data from the Hubble Space Telescope, a group of researchers led by University of Wisconsin–Madison astronomer Andrew Nine has discovered that at least some of the blue lurkers were spun up as they absorbed the gas of dying partner stars.

Nine's team spotted the blue lurkers' partners as hot white dwarfs, which are collapsed versions of former stars still bright enough to be seen from Earth.

These hot former stars are young by astronomical standards—just a few hundred million years old.


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Mysterious 'blue lurker' stars 334pu7m
Dragon
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Post by Dragon Sat Jan 15, 2022 1:03 am

Mysterious 'blue lurker' stars Mysterious-blue-lurker
Credit: Sloan Digital Sky Survey

The open cluster M67 hosts a number of so-called blue stragglers, stars that spin far faster than expected.

New research suggests the stars got a spin boost by absorbing gas from a dying partner star.


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Mysterious 'blue lurker' stars 334pu7m
Dragon
Dragon
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Mysterious 'blue lurker' stars Empty Re: Mysterious 'blue lurker' stars

Post by Dragon Sat Jan 15, 2022 1:04 am



Vampire Stars (Blue Stragglers)


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Mysterious 'blue lurker' stars 334pu7m

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