| 单词 | blue straggler |
| 释义 | > as lemmasblue straggler blue straggler n. Astronomy a bright blue star which, when plotted on the Hertzsprung–Russell diagram, lies close to the main sequence but beyond the turn-off point, as if its evolution had been delayed (cf. main-sequence turn-off n. at main adj.2 Compounds 2).Such stars are typically found in star clusters and dwarf galaxies, and may be the product of an interaction between two stars. ΚΠ 1958 Astrophysical Jrnl. 128 182 Additional bright blue ‘stragglers’ are known in the Coma Berenices cluster... These bright blue stragglers are not understood on current ideas of stellar evolution. 1974 Acta Astronomica 24 359 (title) BS Scuti, possibly a blue straggler in M 11. 1991 Astronomy Dec. 22/2 The core of 47 Tucanae contains a number of stars exceptionally bright in ultraviolet light—the so-called blue stragglers. 2008 N. Leigh et al. in E. Vesperini et al. Dynamical Evol. Dense Stellar Syst. 331 There is an overall consensus that blue stragglers are the products of stellar mergers between two (or more) low mass MS stars, either through direct stellar collisions or the coalescence of binary systems. < as lemmas |
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