A-type main-sequence star | Wikipedia audio article | Wikipedia audio article
Channel: wikipedia tts
Date: 18/11/2018

This is an audio version of the Wikipedia Article:
A-type main-sequence star | Wikipedia audio article

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SUMMARY
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An A-type main-sequence star (A V) or A dwarf star is a main-sequence (hydrogen-burning) star of spectral type A and luminosity class V. These stars have spectra which are defined by strong hydrogen Balmer absorption lines. They have masses from 1.4 to 2.1 times the mass of the Sun and surface temperatures between 7600 and 11 500  K. 
Bright and nearby examples are Altair (A7 V), Sirius A (A1 V), and Vega (A0 V). A-type stars do not have a convective zone and thus are not expected to harbor a magnetic dynamo. As a consequence, because they do not have strong stellar winds they lack a means to generate X-ray emission.