Exoplanet Stats

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In another thread, Pale blue dot thread, the catalog presented from another paper, here, presents an extensive list of exoplanets in the HZs (both OHZ and CHZ). The OHZ is the Optimistic zone that extends to an Early Venus position to allow consideration of exoplanets that may have once had liquid water, I think. It also extends to a Mars for the outer OHZ.

This broadens the HZ, of course, so more exoplanets will be found.

One area I would like explanation is that the list is based on extensive formulations done in 2014 where the Early Venus and the Mars parameters were limited to a mass of 1 Earth. The coefficients vary as mass changes, and the list includes very massive objects that would seem to me, at least, not be ones that could be used for those limited formulations.

With that in mind, I elected to simply adjust (fudge) the inner and outer zones a little but limit the exoplanet mass to under 13 Earth masses. As noted in a prior post, I also tweaked their 2017 Radius => Mass equation to fit today's better data. This is important since their HZ formulae require both radius and mass. I could extend the list to the more Jupiter-like exoplanets, as they did, but I don't have reliable coefficients, nor do I think there is great hope for an Earth-like Jupiter-mass exoplanets to be found, for that matter.]

Notice that their method produces only 4 HZ exoplanets with reasonable masses.

View: https://imgur.com/LUhhw7C
 
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As of today (10/25), the count is 5225, with an extra one found in the HZ (115 total), but it doesn't fall into the selected size of 0.5 to 1.8 Earth Radii. So the table of results above is the same, essentially.
 
There is a more sophisticated method for calculating the HZ, as mentioned earlier. I can't say if it is actually more reliable in predicting HZ planets, but I hope to be able to present all reasonable models for everyone's consideration. Better telescopes, especially the JWST, should tweak these models.

Notice how there are now more Earth-sized exos in this model than shown before. This is a corrected model. I found an incorrect mass multiplier in my program, which is now corrected.

The green highlight are the exoplanets about the size of Earth.

The percentages shown in the 2nd column are where the exoplanet is aligned from the middle of the HZ. A 0% value means it is in the middle of the HZ. A negative percentage means it is closer to the star from the model (hence a little hotter).

View: https://imgur.com/RwVelrh
 
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