#browndwarf β Public Fediverse posts
Live and recent posts from across the Fediverse tagged #browndwarf, aggregated by home.social.
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Re-post from MinCup past:
The non-detection of #perovskite in non-stars shows that it's there.Cool red dwarf stars have deep absorption bands from TIO gas in their atmospheres. In yet cooler brown dwarfs those bands have disappeared: opaque perovsite dust has condensed, making the titanium invisible.
Spectra from Kesseli et al. (2017), images from Gabicca, LEAP group.
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Scientists Find a Quadruple Star System in Our Cosmic Backyard
First, the #astronomers identified what they believed was a lone #browndwarf orbiting a bright single #star. Further investigation revealed that the brown dwarf was actually two. After submitting a paper about the discovery, Dr. Zhang said, they realized that the bright companion was a pair of #stars, too.
βI like to call this a double-double,β said Adam Burgasser, an #astrophysicist.
https://www.nytimes.com/2025/08/25/science/quadruple-star-system.html
https://archive.ph/4CqdP -
A fascinating and unlikely pair, perhaps doomed in the future.
Would love to watch a white dwarf devour a brown dwarf, wonder how many other stellar remnants have eaten their lesser twin and would we know?https://www.astronomy.com/science/this-brown-dwarf-used-to-be-inside-its-white-dwarf-companion/
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The non-detection of #perovskite in non-stars shows that it's there.
Cool red dwarf stars have deep absorption bands from TIO gas in their atmospheres. In yet cooler brown dwarfs those bands have disappeared: opaque perovsite dust has condensed, making the titanium invisible.
Spectra from Kesseli et al. (2017), images from Gabicca, LEAP group.
#MinCup24 #Astronomy #RedDwarf #BrownDwarf #L_Dwarf