Difference between revisions of "Clusters"
From PGSC Wiki
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* Draw an HR diagram for a globular cluster | * Draw an HR diagram for a globular cluster | ||
* What is pleides? What is its mass? | * What is pleides? What is its mass? | ||
| − | * Tell me about globular clusters in a Galaxy. (SR) | + | * Tell me about globular clusters in a Galaxy. (SR) (Variation, (PJ): What is a globular cluster?) |
** Mass, Number of Stars, Spatial Distribution in a galaxy, Typical Ages, Number in the Milky Way and in M87... | ** Mass, Number of Stars, Spatial Distribution in a galaxy, Typical Ages, Number in the Milky Way and in M87... | ||
* What is the Spitzer instability? (SR) | * What is the Spitzer instability? (SR) | ||
Revision as of 01:13, 30 December 2009
Questions in this category have been asked by
- How can you tell the mass and age of a globular cluster?
- What is the typical M/L ratio for a GC? Explain why (age, luminosity dependence on mass).
- Draw an HR diagram for a globular cluster
- What is pleides? What is its mass?
- Tell me about globular clusters in a Galaxy. (SR) (Variation, (PJ): What is a globular cluster?)
- Mass, Number of Stars, Spatial Distribution in a galaxy, Typical Ages, Number in the Milky Way and in M87...
- What is the Spitzer instability? (SR)
Galaxy clusters:
- What are typical temperatures of the gas in a galaxy cluster?
- How do we know this?/What is the emission mechanism?
- What if the gas were instead approximately 10 to 100 K cooler. What would the main emission mechanism be then?
