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

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

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]