Lesson plan
Angular correlation function
The angular correlation function is a function which measures the projected clustering of galaxies, due to discrepancies between their actual and expected distributions. The function may be computed as follows: w(\theta)=\frac{1}{N}\frac{dP}{d\Omega}-1 , where P represents the conditional probability of finding a galaxy, \Omega denotes the solid angle, and N is the mean number density. In a homogeneous universe, the angular correlation scales with a characteristic depth.
Article summary
The angular correlation function is a function which measures the projected clustering of galaxies, due to discrepancies between their actual and expected distributions. The function may be computed as follows: w(\theta)=\frac{1}{N}\frac{dP}{d\Omega}-1 , where P represents the conditional probability of finding a galaxy, \Omega denotes the solid angle, and N is the mean number density. In a homogeneous universe, the angular correlation scales with a characteristic depth.
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
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