pulsating star


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pulsating star

[′pəl‚sād·iŋ ′stär]
(astronomy)
Variable star whose luminosity fluctuates as the star expands and contracts; the variation in brightness is thought to come from the periodic change of radiant energy to gravitational energy and back.
References in periodicals archive ?
Earlier in June Swiss astronomers discovered a (http://ibtimes.com/new-class-variable-stars-discovered-swiss-astronomers-star-cluster-ngc-3766-photo-1303455) new class of pulsating stars .
These tend to have considerably larger amplitudes and longer periods than the other pulsating stars.
Now, an international team of researchers from Japan, South Africa and Italy have discovered a large area at the center of the Milky Way that is completely devoid of these pulsating stars.
The primary goal of the EXOTIME project is to use the timing method to detect exoplanets around evolved pulsating stars such as subdwarf B (sdB) stars and white dwarfs.
Now with the help of a trio of brightly pulsating stars, Sukanya Chakrabarti (Rochester Institute of Technology) and colleagues say they have found the fugitive dwarf galaxy.
Cepheids are extremely bright, pulsating stars. Their pulsation periods are directly related to their intrinsic luminosities.
Using one type of distance indicator, youthful pulsating stars known as Cepheid variables, the team calibrated the true brightness of another indicator in the same galaxies, exploded stars known as type 1a supernovas.
The structure remains the third largest steerable telescope in the world and plays a key role in global research on pulsating stars, testing extreme physics theories including Einstein's general theory of relativity.
Yellowish, pulsating stars known as Cepheid variables remain the favorite, and many say the most credible, standard candle for estimating the distance to relatively nearby galaxies.
This process is simple in orderly, highly regular pulsating stars such as Cepheids and RR Lyraes.
This galaxy is of further interest to astronomers because its relative proximity allows them to study a wide range of astronomical objects within it, including stellar nurseries, dust clouds, and pulsating stars called Cepheid variables, which astronomers use as distance markers in the Universe [2].
Delta is the prototype of a class of pulsating stars known as Cepheid variables.