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Astronomy and Cosmology
Astronomy and Astrophysics
Brown Dwarf Mass Gain: Does Radius Increase?
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[QUOTE="snorkack, post: 6046951, member: 436348"] If you add mass to an asteroid, its density is not changed, because at the low pressure inside an asteroid, rocks are practically incompressible. An asteroid with 200 % mass of another has 200 % the volume. However, as the body gets larger, interior pressure increases and increasingly compresses the contents. Jupiter has 330 % the mass of Saturn, but only 170 % the volume. If you keep adding mass and pressure, then after a body gets only slightly bigger than Jupiter, the pressure in the interior has reached such a level that further addition of mass causes decrease of volume, as the interior is compressed more than the added mass takes up. That's the range characteristic of brown dwarfs. Tritium is short-lived and rare in nature. So which do they and do they not initiate? That's probably an arguable question of classification. Some white dwarfs are known to have cooled to 4000 K, yet they are called white dwarfs rather than red dwarfs. [/QUOTE]
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Astronomy and Cosmology
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Brown Dwarf Mass Gain: Does Radius Increase?
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