Questions regarding the amount of energy produced by an object per unit of time.
Questions tagged [luminosity]
130 questions
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How to convert magnitudes to bolometric luminosity?
If we know a star's magnitudes from several bands(say u,g,r,i,z,J,H,k) and the star's distance, how to calculate Lbol?
Let's suppose the star has a black body spectrum. Is there any manual about the calculation? It's better to have a lot of…
questionhang
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Change in Luminosity of a planet
When viewed from the sun, the brightness of the planet with a given
size and albedo changes according to the fourth power of inverse
distance.
I found the statement in one encyclopedia but I can't find any mathematical proof of this.
Particle king
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Formula to calculate B-V index?
Is there a formlua or equation to calculate a star's B-V index based on it's observed frequencies in the B and V spectrums ? I have unfortunately not been able to find anything...
A.D
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Solar luminosity proportional to $G^7$?
A book I recently purchased describes Dirac's proposed variation of Newton's G, and why that specific proposal wouldn't work because the earth would have been too hot for the known history of life. A footnote explains that the luminosity of the sun…
stellatedHexahedron
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Converting the log (Stellar Luminosity/Solar Luminosity) and the log of the plus and minus variation
There are some stars in the NASA Exoplanet Archive that I am interested in but I am confused by the physical meaning of the terms.
For example, there's a star BD+15 2940 with a log10 of Solar Luminosity of 2.01 +/-0.75 where the variation is also a…
Naz
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