instability strip


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instability strip

short for Cepheid instability strip. See pulsating variables.

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.
References in periodicals archive ?
All pulsating Algols detected and analysed thus far lie inside the classical 5 Scuti star instability strip very close to the ZAMS (Mkrichian et al.
The instability strip, which goes through Xinjiang, Afghanistan, Pakistan, and may immediately affect the Ferghana Valley, Kadyr Malikov, Director of Analytical and Research Center, told reporters today.
A sampling of topics: stellar evolution models of rotation in white dwarfs, central stars of planetary nebulae, a new look at the empirical initial-final mass relation, white dwarfs in the Capodimonte Deep Field, broad-band molecular polarization in white dwarfs, self-consistent diffusion in low mass hot stars, Spitzer observations of GD 362 and other metal-rich white dwarfs, the progenitors of type Ia supernovae, and testing the purity of the ZZ Ceti instability strip.
The latter are main-sequence stars that are expected to pulsate because they lie in the so-called instability strip on the Hertzsprung- Russell diagram.
All stars that begin life with about 5 to 20 solar masses eventually pass through the instability strip, some more than once.