spectroscopic binary

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spectroscopic binary

n.
A binary star whose components are identified by periodic Doppler shifts of the system's spectral lines as the orbital motion along the line of sight alternates toward and away from Earth.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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The group's brightest star is actually a spectroscopic binary composed of two O-type stars, weighing in at 44 and 37 solar masses and orbiting each other in 22 days.
Cygnus Puzzlers: Get to know these deep-sky strangers this summer
Each of the components itself is a spectroscopic binary, making Castor a quadruple star system with its six individual stars gravitationally bound together.
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Cygnus X-1: A spectroscopic binary with a heavy companion?
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Theta Orionis The Trapezium Multiple Star System Star Mag(v) Notes A 6.7 Eclipsing binary in 3-star system B 8.0 Eclipsing binary in 5-star system C 5.1 Spectroscopic binary star D 6.7 Double star E 11.1 Spectroscopic binary star F 10.1 Binary star G 13.7 Single star Data are taken from recent catalogs, with additions by Jerry Lodriguss.
The Jewel in the Sword: An observer captures on a sketchpad the stunning details of one of the most wondrous objects in the night sky
The companion is actually a spectroscopic binary composed of a G5 giant star and an F2 dwarf separated by only two-fifths the distance between the Earth and Sun.
Showpiece doubles: point your telescope toward these gems of the late-summer sky
Beta Scorpii is listed in one place as an unresolved spectroscopic binary and in another as an "Intense, colorful" double (it's actually both).
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cluster is dominated by a 6th-magnitude spectroscopic binary, its
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