Questions about large, dense, massive collections of stars orbiting galaxies, thought to have formed in the early universe.
Questions tagged [globular-clusters]
37 questions
19
votes
2 answers
Why aren't globular clusters disk shaped
I thought that solar systems and galaxies are disk-shaped because that is the most stable shape under gravitation. Globular clusters are very old, often times older than their host galaxies, so why haven't they flattened out?
griffins
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4
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0 answers
How are globular clusters formed?
It is said globular clusters are usually very old and that they orbit around galaxies. But, I never read the reason why globular clusters are old, have that shape, and orbit around galaxies. What is their history?
MABC
- 171
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4
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2 answers
Globular cluster star density as a function of distance from the center
Context: I want to simulate globular clusters in a simple way, just to display the positions of stars.
Assuming isotropy, what would be a reasonable model of the stellar number density as a function or r, the distance from the center of the…
John
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2
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0 answers
unstudied open clusters?
I want to know any open clusters which we don't know a lot about.
Open clusters of which we don't know about the:
chemical composition
ratio of no. of stars in front vs back tidal trail
2
votes
1 answer
Globular Cluster diameter
I am doing a homework on globular clusters and could not find trustworthy data on the average diameter of a globular cluster. Most clusters I included had a diameter of 120-150 ly.
But is that the average diameter of such globular clusters?
adriankroeger
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2
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1 answer
Do the heliospheres of stars at the center of globular clusters interact?
I read that the stars in the center of globular clusters are incredibly close to one another and that these stars can be spaced 100 to 1000 times closer than the stars near the sun. Because these stars are so closely spaced, would their heliospheres…
Gliese
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1
vote
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How do we find the king model of a globular cluster?
We have data for a globular cluster M13. We have plotted the radius in pixels against the surface brightness in magnitudes per square arcsec.
We have to find the king model for this. We don't exactly know how to do that. We think we just have to set…
Danielvanheuven
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0
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Do we have an accurate breakdown of star types in globular clusters?
I became interested in the breakdown of star types in globular clusters when trying to give a good answer in a Quora question. I had a difficult time finding an answer.
What I did find out was that what we see is about 10 percent of the stars and…
Jack R. Woods
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