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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 defined by strong hydrogen Balmer absorption lines. They measure between 1.4 and 2.1 [[Sol|solar masses]] (M☉) and have surface temperatures between 7,600 and 10,000 K. Bright and nearby examples are Altair (A7 V) and Sirius A (A1 V). A-type stars do not have convective zones and thus are not expected to harbor magnetic dynamos. As a consequence, because they do not have strong stellar winds, they lack a means to generate X-ray emissions.
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[[Category:A-type main sequence]]
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== See also ==
* [[wikipedia:A-type main-sequence star|A-type main-sequence star]] on Wikipedia
== References ==
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{{Short description|Stellar classification}}
[[Category:Star types]]
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