Talk:Blue dwarf (red-dwarf stage)

This article was nominated for deletion on 17 July 2012 (UTC). The result of the discussion was keep.

Rubbish[edit]

I found this here:"...a more luminous star needs to radiate energy more quickly to maintain equilibrium." This completely reverses cause and effect. A fully convective star, generating more energy, will radiate more energy, not the other way around.

Upon further investigation, I have determined that the ONLY reference given here is about M Class dwarf stars which are RED DWARFs. Additionally, I found ZERO occurrances of "blue dwarf" stars in the first 120 Google Scholar hits (search terms: blue dwarf). The useage is suspect, and while O-Class stars can be characterized as appearing "blue", apparently NO ONE uses the term "blue dwarf" (except for galaxies and compact galaxies). I CHALLENGE the FACTUAL BASIS of this article. Unless authoratative sources can be found, it should be removed. Note that "Dwarfs (Blue, ... " also appears (erroneously, imho) as a category in Wikipedia's classification scheme. The only occurrance I found using "blue" was "blue white-dwarf".216.96.76.19 (talk) 10:55, 18 August 2014 (UTC)[reply]

More rubbish[edit]

More rubbish? "Blue dwarfs eventually evolve into white dwarfs once their hydrogen fuel is completely exhausted,[1] which in turn will eventually cool to become black dwarfs." White and hypothetical future black dwarfs are highly dense remnants of larger stars ... would a brown and then blue dwarf go that way after all, i.e. would it collopse that much?? Meerwind7 (talk) 20:03, 23 April 2020 (UTC)[reply]

Just out of curiosity, without checking to see if the single source provide actually says anything on the subject, what else would such a star become? There is nothing exotic about a white dwarf, no mass limits or strange evolution necessary. It is just a (relatively) hot ball of (usually) helium that is supported by electron degeneracy rather than its own internal energy generation. Likewise black dwarf, cold ball of "gas" supported by electron degeneracy. Lithopsian (talk) 20:45, 23 April 2020 (UTC)[reply]

I agree about this being rubbish. Why would a (blue) dwarf star be considered blue at all? The idea seems to be that a blue dwarf would form out of a red dwarf, and that a blue dwarf would then cool to become a white dwarf, but the whiteness of a white dwarf doesn't have anything to do with its being a blue dwarf first: There are white dwarf stars in the universe, even if there haven't been any blue dwarf stars (...because it takes trillions of years for a red dwarf to exhaust its fuel and the universe isn't old enough yet for that to have happened). So, why is it not possible for blue dwarf stars to form independently of red dwarf stars? If a blue star is blue because of its surface temperature (highest, with red being the coolest), and if Adams et al. are correct in suggesting their hypothesis for how a star get hotter after being red, then why couldn't there be dwarf stars that are blue by some other process or otherwise be considered blue dwarf stars at the early range of the life span (early part of the main sequence)? The color references seem like a confused jumble. — Preceding unsigned comment added by 45.37.118.226 (talk) 00:29, 17 August 2022 (UTC)[reply]