<p>Many hot stars are born in multiple star systems because the cores of these stars tend to split (see <a href="https://en.wikipedia.org/wiki/Jeans_instability" rel="nofollow noreferrer">Jeans instability</a>). With lower mass stars this still can happen. However, there are other ways. For example, in a young star cluster, close encounters with other stars can cause a star to be captured by another one.</p>

CC BY-SA 4.0
2020-12-22T14:02:20.640Z
Thank you very much. Thus, what is the difference between the origins of hot stars and cooler stars as multiple systems? Is there a smaller probability that lower mass stars origin as multiple systems, but they are often captured by another one?
Elena Greg
CC BY-SA 4.0
2020-12-22T14:11:45.970Z
@ElenaGreg They all usually start in large nebulas, which then turn into an open cluster as stars form; this is where most encounters occur.
WarpPrime
CC BY-SA 4.0
2020-12-22T14:25:54.777Z
And why the majority of hot stars originate as multiple systems is fully explained by Jeans instability?
Elena Greg
CC BY-SA 4.0
2020-12-22T14:29:56.753Z
@ElenaGreg Yes, mostly. But also captures make some of it up as well
WarpPrime
CC BY-SA 4.0
2020-12-22T13:48:25.430Z
2020-12-22T13:48:25.430Z
WarpPrime
<p>The majority of hot stars originate as binaries or multiple systems. How is it with the cooler spectral types? Are they usually born as single stars?</p>

<star><stellar-evolution><binary-star><star-formation><multiple-star-systems>
Origin as binaries and multiple system
Elena Greg
# Origin as binaries and multiple system

(Asked by: username_0 on 2020-12-22)

The majority of hot stars originate as binaries or multiple systems. How is it with the cooler spectral types? Are they usually born as single stars?

**Tags:** star, stellar-evolution, binary-star, star-formation, multiple-star-systems

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## 1 answers

### Answer by username_1 on 2020-12-22. Score: 2 | Accepted answer

Many hot stars are born in multiple star systems because the cores of these stars tend to split (see [Jeans instability](https://en.wikipedia.org/wiki/Jeans_instability)). With lower mass stars this still can happen. However, there are other ways. For example, in a young star cluster, close encounters with other stars can cause a star to be captured by another one.

> **Comments:**
> **username_0**: Thank you very much. Thus, what is the difference between the origins of hot stars and cooler stars as multiple systems? Is there a smaller probability that lower mass stars origin as multiple systems, but they are often captured by another one?  
> **username_1**: @ElenaGreg They all usually start in large nebulas, which then turn into an open cluster as stars form; this is where most encounters occur.  
> **username_0**: And why the majority of hot stars originate as multiple systems is fully explained by Jeans instability?  
> **username_1**: @ElenaGreg Yes, mostly. But also captures make some of it up as well  

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