# What Do You Think About That A 1879 Stefan's Law Be Used To Calculate Star Radius Or Temperature?

No replies to this topic

### #1 rhertz

rhertz

Understanding

• Members
• 303 posts

Posted 29 April 2019 - 11:11 PM

Since then, variations of the Stefan Law is widely used to determine some basic properties of a star, like:

• Star Luminosity
• Star Surface temperature

To calculate any given star Luminosity, Stefan's law is expressed as:

L = 4 π R2 σ Τ 4

L: Luminosity (in Watts)

T: Star's surface temperature.

Stefan-Boltzmann Constant  σ=5.67×10−8W.m-2K-4

This is a variation of the original Stefan's formula, widely used to calculate any star temperature by finding the absolute luminosity

based in relative comparations with proper references:

j = T4

where j is the Iradiance or Flux Density (Watt/m^2), which is estimated by comparisons with references (like our Sun's Irradiance).

Edited by rhertz, 18 June 2019 - 08:42 PM.