Why globular clusters don't collapse.

[Jordi Heguilor]

I asked Bard that question and it responded (among other things) that a) globular clusters are spherical and b) that they are spinning rapidly. Aren't those two things contradictory, as in they should be flattened by centrifugal forces?

 

[Vanadium 50]

If Bard is some sort ofg AI Chatbot, don't believe it.

Globular clusters are not rigid, so they do not rotate like rigid objects. Further, they are pressure supported, which means that the individual stars rotation parameters are fairly random, unlike spirals.

 

[TonyStewart]

openai gave a lot more considerations: (bound together by their mutual gravitational attraction.) Gravitational balance, Stellar Velocity Dispersion, mass segregation, tidal effects, a broad distribution of kinetic energies within the cluster, higher energy orbits, Stellar Collisions and re-balancing, mass loss and gravity reduction, dark matter gravitational attraction, high mass-to-light ratio, yet low contamination levels of gas, dust prevent mass clouds that promote collapse. May contain intermediate black holes.

Like rain drops with "like charges", stars repel each other
- while in random kinetic motion
- to contain 10k to 10m stars in a cluster from 3.2 ly across or 100 ly across and up.
- 150m clusters in Milky Way each very dense. Living inside a Globular Cluster
- from Fraser Cain: Publisher Universe Today ...

 

[berkeman]

I asked Bard that question and it responded (among other things) that a) globular clusters are spherical and b) that they are spinning rapidly. Aren't those two things contradictory, as in they should be flattened by centrifugal forces?

Welcome to PF, Jordi.

AI chatbots are not considered to be Acceptable Sources here at PF. Please do not try to use them (yet) for technical discussions. You are new here, so you probably had not noticed this in the PF Rules yet:

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@Vanadium 50 knows about this rule (hence his reply), and @TonyStewart should know better. Thread is locked.