A-type Main Sequence Star
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 7,600 and 10,000 K. Bright and nearby examples are Altair (A7 V), Sirius A (A1 V), and Vega (A0 V).
Read more about A-type Main Sequence Star: Spectral Standard Stars, Planets
Famous quotes containing the words main, sequence and/or star:
“the main jet
Struggling aloft unti it seems at rest
In the act of rising, until
The very wish of water is reversed,”
—Richard Wilbur (b. 1921)
“It isnt that you subordinate your ideas to the force of the facts in autobiography but that you construct a sequence of stories to bind up the facts with a persuasive hypothesis that unravels your historys meaning.”
—Philip Roth (b. 1933)
“I put the gold star up in the front window
beside the flag. Alterations is what I know
and what I did: hems, gussets and seams.”
—Anne Sexton (19281974)