Is there a difference between ultracool dwarf and brown dwarf?

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  • Thread starter ZX.Liang
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  • #1
ZX.Liang
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After reading the introduction of ultracool dwarf and brown dwarf in Wikipedia, I can't see the difference between them.
Besides, do they all belong to the main sequence stars?
 

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  • #2
256bits
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I found this.
You can read more about from Kurkpatrick it at
https://articles.adsabs.harvard.edu//full/1998ASPC..134..405K/0000405.000.html
if that makes any more sense to you ( or me ).
First time I have heard of ultra cool.
thanks for beinging it up.

I think all brown dwarfs are in the ultra cool class, but not all ultra cool are brown dwarfs.

PS.
One should post the site(s) visited to which you are referencing.
A complete opening post shows a reference for others to 'reference.'
Wiki, though, is easy to find.
 
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  • #3
ZX.Liang
16
3
I found this.
You can read more about from Kurkpatrick it at
https://articles.adsabs.harvard.edu//full/1998ASPC..134..405K/0000405.000.html
if that makes any more sense to you ( or me ).
First time I have heard of ultra cool.
thanks for beinging it up.

I think all brown dwarfs are in the ultra cool class, but not all ultra cool are brown dwarfs.

PS.
One should post the site(s) visited to which you are referencing.
A complete opening post shows a reference for others to 'reference.'
Wiki, though, is easy to find.
Thank you.
The paper is very helpful.

Two Wikipedia pages.

Ultra-cool dwarfs:
https://en.wikipedia.org/wiki/Ultra-cool_dwarf

Brown dwarf:
https://en.wikipedia.org/wiki/Brown_dwarf
 

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