Habitable Zone Outer Maximum Greenhouse Boundary Calculator
Conditional maximum-greenhouse HZ outer radius in AU using independently applicable effective flux; no atmospheric/habitability calculation.
Description
Habitable Zone Outer Maximum Greenhouse Boundary Calculator: return conditional outer radius au.
The maximum-greenhouse outer boundary estimates where a carbon-dioxide atmosphere stops providing enough net warming for surface liquid water in the chosen climate model. Its effective-flux threshold must be appropriate to the host star.
The result is a conditional outer-boundary radius in astronomical units (AU), calculated from the luminosity and flux threshold you supply.
When to use this tool
Use this tool when the supplied inputs match the specific operation described above and you need a repeatable result under its stated convention.
- Check the supported input and output contract against an existing calculation or observation.
- Use the complete example to confirm units, selector spelling and result interpretation.
How to use the tool and how it works
- Enter luminositySolar and a maximum-greenhouse effective-flux threshold using the units defined below.
- Run the calculation. Correct input errors before interpreting the result.
- Read conditionalOuterRadiusAu as a distance in AU. Assess the supplied model threshold separately.
Enter luminositySolar as the luminosity ratio L/L_sun. Each effective-flux input is a dimensionless ratio to present solar irradiance at Earth’s orbital distance of 1 AU: 1 means that reference irradiance. Do not enter a flux in W/m². With these normalized inputs, the relation sqrt(luminositySolar / effectiveFlux) returns a distance in AU.1
The tool returns sqrt(luminositySolar / callerOuterEffectiveFlux) as conditionalOuterRadiusAu.2
| Input field | Meaning and units | Accepted input |
|---|---|---|
| luminositySolar | Stellar luminosity divided by solar luminosity (L/L_sun); dimensionless. A value of 1 represents a solar-luminosity star. | Finite number; greater than zero |
| callerOuterEffectiveFlux | Maximum-greenhouse outer-boundary incident flux divided by present solar irradiance at 1 AU; dimensionless. | Finite number; greater than zero |
| Output field | Interpretation |
|---|---|
| result | Object containing the following named result fields. |
| result.conditionalOuterRadiusAu | Outer-boundary distance from the star, in AU, conditional on the supplied effective flux. |
{
"input": {
"luminositySolar": 1,
"callerOuterEffectiveFlux": 0.25
},
"output": {
"result": {
"conditionalOuterRadiusAu": 2
}
}
}Limitations and assumptions
- The effective flux is supplied, not derived from a stellar-spectrum or atmospheric calculation.
- Every declared field is required and unexpected fields are rejected. Numeric inputs must be finite; input errors are distinct from a valid false result or an explicitly qualified output.
- Extremely large inputs and nonfinite or excessively large outputs are rejected. List positions reported by the tool use zero-based indices unless stated otherwise.
Alternative or Complementary methods
Check the underlying observations, units and conventions independently before using the result in a larger workflow. The tools listed below address nearby tasks; compare their inputs and scope before substituting one for this operation.
References
Similar or alternative tools
- gray greenhouse layered temp estimator
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- Optimistic Venus-Mars HZ Limits Estimator Calculator
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