Jorrie
Science Advisor
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My first reaction was that only the Ynow change would not give valid calculation for an earlier epoch, but to my surprise it works as you have done it. Leaving all the other stuff the same, the calculator calculates the new earlier energy balance and in effect just shrinks the past light cone, while the other outputs remain the same. It essentially just shifts the now-line up and down on the Davis Figure 1. Its a new usage of the tool that you have discovered. :-)marcus said:I checked. The coincidence does seem merely accidental. I used version 6 and put in S_lower = 1 and Steps=50 (to get nice resolution).
Then I put in Y_now = 12.0 instead of 14.0. That corresponds to an earlier time in the same universe. The age is now only around 10 Gy instead of 13.7 Gy.
It's bed time in my valley, so I will look at it again some time tomorrow.