# Solar Luminosity

In Astrophysical, the solar luminosity is the unit of Luminosité conventionally used to express the luminosity of the star S. It is equal to that of the Sun.

Its symbol and its value are:

$L_ \left\{\ odot\right\} = 3,826 \ times 10^ \left\{26\right\} \; \left\{\ rm W\right\}$.

In the System cgs, the numerical value of the solar luminosity is multiplied by 10 7 since the Watt (or Joule by second) is replaced by the Erg by second. The solar luminosity becomes, in approached value,

$L_ \left\{\ odot\right\} \ simeq 4 \ times 10^ \left\{33\right\} \; \left\{\ rm erg\right\} \ cdot \left\{\ rm S\right\} ^ \left\{- 1\right\}$.
The solar unit of Masse is, it, of approximately 2× 10 33   G. Also, in these units, the numerical value of the solar luminosity is it in these units about the double of that of the solar mass. In other words L   /  M   ~  2.

## See too

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