Y Dwarfs

Tiny points of light, with a magic all their own.
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Christopher K.
Posts: 5482
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Y Dwarfs

Post by Christopher K. »

Stars with human body temperatures? I know it sounds like a breach in logic, but...

WISE data has revealed a new class of stars virtually invisible in optical light. Y dwarfs are cooler than T dwarfs, which are cooler than L dwarfs. (L, T and Y are an extension of the famous Fleming-Cannon classification of stars--O-B-A-F-G-K-M.)

The six Y dwarfs found are all within 40 light-years of the Solar System. WISE 1541-2250 may displace Ross 154 out of seventh place on the list of closest stars.

WISE 1828+2650 has an atmospheric temperature no more than 25 C. It's in Lyra, but even though it's up tonight I don't think too many amateurs will be imaging it!

More information:
http://www.nasa.gov/mission_pages/WISE/ ... 10823.html

Christopher K.
Posts: 5482
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: Y Dwarfs

Post by Christopher K. »

At least so it's a little clearer, Y dwarfs are considered a division of the brown dwarf family--the coolest of the browns, actually. Interestingly, I have found too much more literature on Y dwarfs published since the early 2010s.

More information:
https://science.nasa.gov/science-news/s ... deststars/

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