A-type star

An A-type star is a star within the A-class, a spectral class indicating stars with strong hydrogen absorption lines, a white color and a surface temperature in the range of 7,500 to 10,000 K. The spectral energy distribution peaks in the visible/near ultraviolet range. Main sequence stars of this class are on the order of 2 solar masses, 2 times solar radius and 10 times as bright as the Sun. Such main sequence stars burn their hydrogen in a few hundred million years. Characteristics of A-type main sequence stars:

Example A-type stars are Canopus (a supergiant), HR 8799, Sirius A and Vega.