What two factors combine to determine a star's intrinsic Luminosity?
Answer
Physical size and Surface temperature
Luminosity, which measures the total radiant energy output per unit of time, is an intrinsic property determined by both the physical dimensions (size/radius) and the surface temperature of the star.

Related Questions
What is the approximate minimum mass required for an object similar to the Sun to ignite core hydrogen fusion?Which fundamental stellar characteristic governs the entirety of a star's evolutionary path, from formation to its final remnant?What are the typical diameters, in kilometers, for stellar remnants classified as white dwarfs?According to the direct relationship between temperature and color, what visual appearance results from stars emitting light peaking at longer wavelengths?What is the classification system used by astronomers for stars based on decreasing surface temperature?What two factors combine to determine a star's intrinsic Luminosity?In the logarithmic magnitude scale used to describe apparent brightness, what does a smaller numerical value signify?How do the structure differences between a high-mass star and the Sun relate to their convection zones?How long can a red dwarf star, less massive than $0.25 M_ ext{Sun}$, potentially sustain hydrogen fusion?Which characteristic of a star directly dictates the specific dark absorption lines visible in its spectrum?