4.According to paragraph 2, Population I stars and Population II stars differ from each other in terms of both A. how old they are and where in their galaxies they are found B. how old they are and whether they have a halo around them ...
Chemical compositions adopted for Population I and II stars are, X =0.7 and Z =0.02, and X =2脳10 4 , respectively. Evidence collected indicates that the open cluster NGC 188 and the globular cluster M92 are the representative samples of the oldest Population I and extreme Population II ...
population I, population II The two classes into which stars and other celestial objects within a galaxy can be divided; the distinction is basically that of age, and the most obvious distinguishing characteristics are the objects' space distribution and chemical content (seemetallicity). The classif...
I and II stars, the role of star formation, dust, the current status of the present-daygalaxy luminositydensity measurements, and the deepgalaxy countsfrom NIR to far-IR (FIR).Section 7is devoted to the signature of Population III in the CIB and its structure and the almost unique role ...
I, II, or III. The stellar populations show a continuum of properties, and it is difficult to place some stars in a given population. Population III stars are hypothesized to be the first ones formed in the Universe, when the composing gas was only H and He. Since no stars of... ...
网络释义 1. 第二类星族 我们现在看到的最古老的恒星,称为第二类星族(Population II stars) ,应该是稍微晚一点才形成的第二代恒星。和类似太阳的 … tw.knowledge.yahoo.com|基于2个网页
Either of two classes of stars, termed population I and population II; population I are relatively young stars, found in the arms of spiral galaxies, especially the blue stars of high luminosity; population II stars are the much older, more evolved stars of lower metallic content; many high ...
网络第一星族 网络释义 1. 第一星族 天文词汇 P ... poor galaxy cluster 稀少星系团 、[贫星系团]population I第一星族population II 第二星族 ... www.for68.com|基于6个网页 例句 释义: 全部,第一星族
关键词: Binary stars Star formation Interstellar clouds Population I stars Population II stars DOI: 10.1063/1.3518888 被引量: 2 年份: 2010 收藏 引用 批量引用 报错 分享 全部来源 求助全文 dx.doi.org AIP adsabs.harvard.edu ResearchGate EBSCO 查看更多 相似文献 参考文献 引证文献...
关键词: n32120* --physics--astrophysics--stars hydrogen lifetime luminosity mass molecules star evolution stars temperature stars/models for population i and ii compositions, homogeneous, (t stars/mass--luminosity relations for population i and ii, (t 被引量: 80 ...