instability strip

(redirected from Radial pulsations)

instability strip

short for Cepheid instability strip. See pulsating variables.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

instability strip

[‚in·stə′bil·əd·ē ‚strip]
(astronomy)
A portion of the Hertzsprung-Russell diagram occupied by pulsating stars; stars traverse this region at least once after they leave the main sequence.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The two main cycles, roughly one year and a half year, are due to radial pulsations of the star.
These include radial pulsations of the sun, which make the solar surface contract and expand like a ringing bell.
McNamara (1997) and Breger (2000) claim that DS stars have radial pulsations of large amplitudes, if they have rotation with vsini [less than or equal to] 30 km x [s.sup.-1].