Star Polaris Vega Antares a Centauri B Surface temperature (K) 6015 9602 3400 5260 Radius relative to that of the 46 2.73 883 0.865 sun (Ran)
As an amateur astronomer, you are studying the apparent brightness of stars. You know that a star’s apparent brightness depends on its distance from the earth and also on the fraction of its radiated energy that is in the visible region of the
The radius is given in units of the radius of the sun, Rsun = 6.96 * 108 m. The surface temperature is the effective temperature that gives the measured photon luminosity of the star if the star is assumed to radiate as an ideal blackbody. The photon luminosity is the power emitted in the form of photons. (a) Which star in the table has the greatest radiated power? (b) For which of these stars, if any, is the peak wavelength lm in the visible range (380–750 nm)? (c) The sun has a total radiated power of 3.85 * 1026 W. Which of these stars, if any, have a total radiated power less than that of our sun?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
