<p>I was wrong, hot systems are where members have velocities which have magnitudes in all directions in the same order (causing them to have roundish shape), while cold dynamical systems are where random motions do not have the same average magnitude in all directions (ie disc galaxies).</p>

CC BY-SA 4.0
2020-10-11T14:00:14.357Z
2020-10-11T14:00:14.357Z
zabop
<p>My idea of the matter is: hot stellar systems are which form of objects which have a velocity standard deviation comparable to their mean velocity. Is this correct? If it is, is there a <span class="math-container">$\frac{\sigma_v}{&lt;v&gt;}$</span> boundary, which draws a line between hot and cold stellar systems?</p>

<star-systems>
What are hot and cold stellar systems?
zabop
# What are hot and cold stellar systems?

(Asked by: username_0 on 2020-10-11)

My idea of the matter is: hot stellar systems are which form of objects which have a velocity standard deviation comparable to their mean velocity. Is this correct? If it is, is there a $\frac{\sigma\_v}{}$ boundary, which draws a line between hot and cold stellar systems?

**Tags:** star-systems

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## 1 answers

### Answer by username_0 on 2020-10-11. Score: 2 | Accepted answer

I was wrong, hot systems are where members have velocities which have magnitudes in all directions in the same order (causing them to have roundish shape), while cold dynamical systems are where random motions do not have the same average magnitude in all directions (ie disc galaxies).


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