Talk:List of least massive stars

This article was nominated for deletion on 10 August 2015. The result of the discussion was redirect to List of brown dwarfs.

low mass bound[edit]

A star's mass cannot be lower than 13 Jupiter masses, because their mass would be too small to fuse Deuterium, which requires at least a temperature of more than 1500 K.

So, 1500 Kelvins is enough to fuse deuterium? I doubt...

--Bilboq 04:40, 27 August 2006 (UTC)[reply]

- Well, it's the combination between sufficient mass, and the chemical composition of the object that determines the temperature.

For the fusion reactions to occur, though, the temperature in a star's core must reach at least three million kelvins. And because core temperature rises with gravitational pressure, the star must have a minimum mass: about 75 times the mass of the planet Jupiter, or about 7 percent of the mass of our sun. A brown dwarf is heavier than a gas-giant planet, but not quite massive enough to be a star.

M-Dwarfs are at about 2000-3950 K
L-Dwarfs are at about 1500-2000 K
T-Dwarfs are at about 1000 K

So their lack of mass makes the core not hot enough (by gravitational pressure) to start the fusing of Deutrium.

--User:Patrick1982 22:10, 27 August 2006 (UTC)[reply]

Well, I thought that's much more than 1500 K. But according to what is written in article "...too small to fuse Deuterium, which requires at least a temperature of more than 1500 K." it seems that it's saying something like "1500K is enough to fuse Deuterium". That's what confuses me .... 1500K is way lower than 3 000 000K

So should the sentence be "...too small to fuse Deuterium, which requires at least a temperature of more than 3 million K." ?

In our sun there is surface temperature ~ 6000 K and inside it's ~ 15 000 000 K. Outer layers are always cooler .... in both stars and planets.

--Bilboq 02:40, 28 August 2006 (UTC)[reply]

If I remember correctly, isn't the atmosphere of the Sun hotter than its surface? Would that mean the Sun is hotter on the outside layers? Or does the Atmosphere not count as a layer? AstroHurricane001 00:39, 13 October 2006 (UTC)[reply]

The solar atmosphere is indeed hotter than the "surface" (photosphere), but doesn't count as a layer in Bilboq's sense. ~~ —Preceding unsigned comment added by Orcoteuthis (talk • contribs) 19:43, 27 August 2008 (UTC)[reply]

Inaccuracies[edit]

Where are the data from? According to their WP entries, Wolf 424B is about three times more massive than given here (0.14 solar rather than 0.050 solar), Gliese 570D isn't a red dwarf at all, and Gliese 229A is 0.56 solar masses rather than the 0.053 given here. Orcoteuthis (talk) 20:02, 27 August 2008 (UTC)[reply]

I have to agree with Orcoteuthis! The figures stated in this article appear to be utterly rubbish! CrackDragon (talk) 04:21, 27 October 2010 (UTC)[reply]