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So I just found the Habitable Zones in Multiple Star Systems interactive website, where I can create a habitable zone out of multiple stars using the temperature, luminosity, mass and position of each star, which makes it useful for worldbuilders like me. But I prefer to use reality and realism to put into my worldbuilding, so a system of three G-type main sequence stars (or "yellow dwarves") requires an actual understanding of those particular types of stars.

Our sun is, in regards to size, a midway between the maximum and minimum parameters of a yellow dwarf. Here are the basic parameters of a yellow dwarf:

  • A mass anywhere between 84 and 115% of our sun's
  • A surface temperature anywhere between 5300 and 6,000 degrees Kelvin

We know the luminosity of our sun, but if it were actually a midway yellow dwarf, then what would the maximum and minimum luminosity of a G-type main-sequence star be?

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    $\begingroup$ You can use the formula from astronomy.stackexchange.com/questions/32771/…. Roughly between 70% and 140% of the current solar luminosity. $\endgroup$ – Rob Jeffries Aug 3 '19 at 6:09
  • $\begingroup$ If you prefer realism then the answer is you need to use the outputs from stellar models, which are freely available. e.g. astro.df.unipi.it/stellar-models/index.php?m=100 $\endgroup$ – Rob Jeffries Aug 3 '19 at 6:12
  • $\begingroup$ @RobJeffries I'm not asking about the age of the star. $\endgroup$ – JohnWDailey Aug 3 '19 at 11:50
  • $\begingroup$ @JohbWDailey but the luminosity does depend on the age. So can you clarify exactly what you are asking and what you mean by a midway yellow dwarf and how it can have a maximum or minimum luminosity if you are not considering an age dependence? $\endgroup$ – Rob Jeffries Aug 3 '19 at 16:18
  • $\begingroup$ @RobJeffries It was all listed as to the maximum and minimum parameters of the yellow dwarf in regards to mass and temperature. $\endgroup$ – JohnWDailey Aug 3 '19 at 23:39

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