Z ~ 1.6; star formation and angular diameter distance peak coincidence?

zhermes
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Is there any reason to expect both the star formation history and the angular diameter distance to peak at around the same value (redshift ~ 1.6)?
 
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zhermes said:
Is there any reason to expect both the star formation history and the angular diameter distance to peak at around the same value (redshift ~ 1.6)?
Only by pure coincidence. Star formation depends upon the physics of the formation of structure, and peaks at a specific time after the start of our universe. Angular diameter distance peaks at different times depending upon the time of the observer.
 

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