What is the spectrum of rigel?

Rigel, a prominent blue supergiant star in the constellation Orion, exhibits a spectrum characterized by strong absorption lines primarily in the visible range. Its spectrum is dominated by hydrogen and helium lines, along with metal lines from elements such as magnesium, silicon, and iron. The blue color indicates a high surface temperature, around 12,000 to 30,000 Kelvin, which contributes to the emission of a significant amount of ultraviolet radiation. This spectral information aids astronomers in understanding Rigel's physical properties, including its temperature, luminosity, and composition.