A-type star
Quick Summary
An A-type star is a classification of star based on its spectral type, which is determined by its surface temperature. A-type stars are characterized by prominent hydrogen lines in their spectra and have surface temperatures ranging from approximately 7,400 K to 10,000 K. They appear white in color.1
The spectral classification system, originating from the Harvard system, orders stars from hottest to coolest using the letters O, B, A, F, G, K, M. A-type stars fall into the 'A' category within this sequence. While some stars, like peculiar A-type stars, exhibit unusual elemental abundance anomalies, the general classification focuses on temperature and spectral characteristics.213
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