Astrophysics (index)about

A-type star

(A)
(star with spectral characteristics of around 8500K)

An A-type star is a star in the A-class, a spectral class indicating stars with a temperature in the general range of 8500K, applicable to main sequence stars of around 2 solar masses and 2 times solar radius. Such main sequence stars burn their hydrogen in a few hundred million years and have strong hydrogen absorption lines. Characteristics of A-type main sequence stars:

whiteconventional color
7500-9500Ksurface temperature
1.7-2.7radius(solar)
1.6-2.9mass(solar)
1.5-2.4absolute magnitude(visual)
9-24bolometric luminosity(solar)
.5-1.2 billion yearsmain-sequence lifetime
.6%abundance

(star type,spectral type)
http://en.wikipedia.org/wiki/Stellar_classification
WaveLFreqPhoton
Energy
  
145nm2.1PHz8.6eVbeginA-type star
290nm1.1PHz4.3eVendA-type star

Referenced by:
Am star
Ap star
Balmer jump
Balmer-break galaxy (BBG)
Be star
Canopus
globular cluster (GC)
Hyades Cluster
Markarian galaxy (Mkn)
Morgan classification
red giant
RR Lyrae variable (RRL)
star formation rate (SFR)
spectral class
SS 433
stellar demographics
TW Hydrae association (TWA)

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