y*******2
发帖数: 1 | | V*******n
发帖数: 1 | 2 问这个问题你已经和大部分职业天文学家的水平相当，恭喜你。 | r******i
发帖数: 1445 | 3 超大质量恒星如果存在，会瞬间因为自身引力坍缩成黑洞。
【在 y*******2 的大作中提到】
: 可以是一个超大质量恒星不？
| V*******n
发帖数: 1 | 4 质量太大的恒星坍缩过程会发生电子对不稳定把恒星炸成尘埃。 所以理论上恒星级黑
洞质量有上限。
【在 r******i 的大作中提到】
: 超大质量恒星如果存在，会瞬间因为自身引力坍缩成黑洞。
| y*******2
发帖数: 1 | 5 是根据啥计算出恒星质量上限的？
: 超大质量恒星如果存在，会瞬间因为自身引力坍缩成黑洞。
【在 r******i 的大作中提到】
: 超大质量恒星如果存在，会瞬间因为自身引力坍缩成黑洞。
| r******i
发帖数: 1445 | 6 https://en.wikipedia.org/wiki/Stellar_mass#:~:text=A%20study%20of%20the%
20Arches,current%20era%20of%20the%20universe.
One of the most massive stars known is Eta Carinae,[4] with 100–150 M☉;
its lifespan is very short—only several million years at most. A study of
the Arches Cluster suggests that 150 M☉ is the upper limit for stars in the
current era of the universe.[5][6][7] The reason for this limit is not
precisely known, but it is partially due to the Eddington luminosity which
defines the maximum amount of luminosity that can pass through the
atmosphere of a star without ejecting the gases into space. However, a star
named R136a1 in the RMC 136a star cluster has been measured at 315 M☉,
putting this limit into question.[8] A study has determined that stars
larger than 150 M☉ in R136 were created through the collision and merger of
massive stars in close binary systems, providing a way to sidestep the 150
M☉ limit.[9]
The first stars to form after the Big Bang may have been larger, up to 300 M
☉ or more,[10] due to the complete absence of elements heavier than lithium
in their composition. This generation of supermassive, population III stars
is long extinct, however, and currently only theoretical.
【在 y*******2 的大作中提到】
: 是根据啥计算出恒星质量上限的？
:
:
: 超大质量恒星如果存在，会瞬间因为自身引力坍缩成黑洞。
:
|
|
