A history of the universe using the new Planck numbers

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SUMMARY

The discussion focuses on the application of new Planck parameters to model the history of the universe, detailing expansion ratios from the present (S = 1) to future distances projected to be 25 times greater. Key parameters include Hubble constant (H₀ = 67.17), dark energy density (Ωₗ = 0.684), and matter density (Ωₘ = 0.316). The analysis highlights significant points such as the inflection point in the scale factor curve occurring around 7.7 billion years and the eventual growth rate of 1/176 percent per million years, which relates to the cosmological constant Lambda.

PREREQUISITES
  • Understanding of cosmological parameters such as Hubble constant and density parameters
  • Familiarity with the Friedmann equations in cosmology
  • Knowledge of light cone geometry and cosmic event horizons
  • Experience with data interpretation from cosmological tables and graphs
NEXT STEPS
  • Study the implications of Planck parameters on cosmic expansion models
  • Explore the Friedmann equations and their applications in cosmology
  • Analyze the differences between Planck and WMAP data regarding cosmic expansion
  • Investigate the significance of the cosmological constant Lambda in modern cosmology
USEFUL FOR

Astronomers, cosmologists, and physics researchers interested in the dynamics of cosmic expansion and the implications of the latest Planck data on our understanding of the universe's history.

marcus
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Here's a sample history from fairly far back in the past, going up to the present (S = 1) in 20 expansion ratio steps, and then in another 20 expansion steps, going out a good stretch into the future, when distances will be 25 times what they are today.

I could have asked for a wider expanse of time and a greater overall expansion to be covered, but this seemed ample for test-driving the new Planck parameters.{\begin{array}{|c|c|c|c|c|c|c|}\hline Y_{now} (Gy) & Y_{inf} (Gy) & S_{eq} & H_{0} & \Omega_\Lambda & \Omega_m\\ \hline14.56&17.6&3400&67.17&0.684&0.316\\ \hline\end{array}} {\begin{array}{|r|r|r|r|r|r|r|} \hline S=z+1&a=1/S&T (Gy)&T_{Hub}(Gy)&D (Gly)&D_{then}(Gly)&D_{hor}(Gly)&D_{par}(Gly)\\ \hline45.000&0.022&0.056&0.085&39.362&0.875&1.247&0.153\\ \hline37.201&0.027&0.075&0.114&38.595&1.037&1.488&0.206\\ \hline30.753&0.033&0.100&0.151&37.750&1.228&1.772&0.277\\ \hline25.423&0.039&0.133&0.201&36.821&1.448&2.107&0.372\\ \hline21.017&0.048&0.178&0.268&35.798&1.703&2.500&0.498\\ \hline17.374&0.058&0.237&0.357&34.672&1.996&2.959&0.667\\ \hline14.363&0.070&0.316&0.475&33.434&2.328&3.494&0.893\\ \hline11.874&0.084&0.420&0.632&32.071&2.701&4.111&1.196\\ \hline9.816&0.102&0.559&0.841&30.573&3.115&4.821&1.599\\ \hline8.115&0.123&0.745&1.118&28.926&3.565&5.628&2.137\\ \hline6.708&0.149&0.991&1.485&27.115&4.042&6.538&2.855\\ \hline5.546&0.180&1.317&1.971&25.129&4.531&7.551&3.812\\ \hline4.584&0.218&1.751&2.610&22.951&5.006&8.659&5.086\\ \hline3.790&0.264&2.323&3.443&20.571&5.428&9.846&6.780\\ \hline3.133&0.319&3.076&4.516&17.982&5.740&11.084&9.028\\ \hline2.590&0.386&4.060&5.861&15.189&5.865&12.330&11.999\\ \hline2.141&0.467&5.325&7.485&12.215&5.705&13.526&15.903\\ \hline1.770&0.565&6.923&9.331&9.111&5.148&14.608&20.991\\ \hline1.463&0.683&8.883&11.256&5.963&4.075&15.518&27.544\\ \hline1.210&0.827&11.200&13.059&2.882&2.382&16.225&35.865\\ \hline1.000&1.000&13.834&14.560&0.000&0.000&16.730&46.281\\ \hline0.851&1.175&16.259&15.529&-2.253&-2.646&17.023&56.991\\ \hline0.725&1.380&18.819&16.232&-4.264&-5.883&17.220&69.718\\ \hline0.617&1.621&21.473&16.718&-6.040&-9.789&17.348&84.771\\ \hline0.525&1.904&24.191&17.040&-7.589&-14.446&17.429&102.522\\ \hline0.447&2.236&26.951&17.248&-8.928&-19.964&17.478&123.419\\ \hline0.381&2.627&29.739&17.380&-10.079&-26.473&17.507&147.994\\ \hline0.324&3.085&32.543&17.463&-11.065&-34.139&17.521&176.879\\ \hline0.276&3.624&35.358&17.515&-11.908&-43.154&17.526&210.819\\ \hline0.235&4.257&38.180&17.548&-12.627&-53.751&17.548&250.694\\ \hline0.200&5.000&41.006&17.568&-13.241&-66.203&17.568&297.535\\ \hline0.170&5.873&43.834&17.580&-13.763&-80.832&17.580&352.560\\ \hline0.145&6.899&46.664&17.588&-14.208&-98.017&17.588&417.194\\ \hline0.123&8.103&49.495&17.592&-14.587&-118.205&17.592&493.115\\ \hline0.105&9.518&52.327&17.595&-14.910&-141.917&17.595&582.294\\ \hline0.089&11.180&55.159&17.597&-15.185&-169.772&17.597&687.047\\ \hline0.076&13.133&57.991&17.598&-15.419&-202.490&17.598&810.091\\ \hline0.065&15.426&60.823&17.599&-15.618&-240.921&17.599&954.621\\ \hline0.055&18.119&63.656&17.599&-15.788&-286.064&17.599&1124.389\\ \hline0.047&21.283&66.488&17.600&-15.932&-339.089&17.600&1323.801\\ \hline0.040&25.000&69.321&17.600&-16.055&-401.373&17.600&1558.036\\ \hline\end{array}}Time now (at S=1) or present age in billion years:13.834
'T' in billion years (Gy) and 'D' in billion light years (Gly)

There are lots of things to recognize in the new history table. The widest point in the teardrop shaped lightcone comes around year 4 billion in the S=2.59 row. A source that emitted light then which we are receiving now would have been receding at the speed of light. Before that objects we see today were receding faster than c and you can calculate the multiple simply by dividing Dthen/THub
I understand the inflection point in the scalefactor curve comes around year 7.7 billion---that's been determined separately (it does not jump out at you from the table.) I haven't included enough rows in this table to capture it. The moment of inflection in distance growth comes between two of my rows.

The eventual growth rate of 1/176 percent per million years is already in effect by the end of the table. You can see its reciprocal clearly in the Cosmic Event Horizon distance DHor by that time, and in the convergence the Hubble time to the corresponding eventual constant value. The square of that growth rate is an alias for the cosmological constant Lambda, so the table makes Lambda visible.

Those are just some of the things recognizable in this sample history.
 
Last edited:
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A comparison of the present Planck with the present WMAP maximum likelihood data as expansion curves, as per TabCosmo7 tables.

attachment.php?attachmentid=57043&stc=1&d=1364109639.jpg


Expansion curve differences only really noticeable in future, although the inflection point for zero acceleration (deceleration-acceleration crossover) shifts from 7.4 Gy to 7.7 Gy, as calculated from second Friedmann equation.
 

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