population II

population II

[‚päp·yə′lā·shən ′tü]
(astronomy)
A class of stars which are relatively old and evolved, have low metallic content and high peculiar velocities from 60 to 300 miles (100 to 500 kilometers) per second, and are found chiefly in the spheroidal halo of a galaxy. Also known as halo population.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
[3.] Ibraimov AI, Kazakova AK, Moldotashev IK, Sultanmuratov MT, Abdyev KS (2010) Variability of Human Body Heat Conductivity in Population II. Diseases of Civilization.
Since the earliest stars that formed in the universe (Population III stars) do not have the required metallicity to host planets, it is believed that the supernova explosions from such stars helped enrich subsequent (Population II) stars, some of which may still be in existence and could host planets.
The Helium Flash "After a star of Population II has evolved away from the main sequence of the Hertzsprung-Russell diagram and become a red giant star, a remarkable 'thermal runaway' occurs deep in its interior.
The three populations in this study were designated Population II, Population III, and Population VII.
Problem behavior and psychiatric impairment in a developmentally disabled population II: Behavior severity.
The probability of peak shifts in a founder population II.
On the other hand, the less luminous reddish stars typical of Population II are abundant toward the center of the system, in Sagittarius.
Population II was a 98-chromosome hybrid that originated from a cross that involved an unreduced L.
19365-3 is a small, red dry bean developed from an interspecific Population II (Florida 6-19/Pc-46) using a modified bulk selection of 10 plants for three continuous generations.

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