Population III stars are very massive stars believed to have existed in the early universe, emitting significantly more light than normal stars. Their unique characteristics make them a key factor in understanding the cosmic infrared background fluctuations. ...
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Following a discussion of possible definitions for these stars, I consider the reasons why astronomers have undertaken this search, and list some of the numerous astrophysical uses of the extremely metalpoor stars which have been found along the way. I then review survey techniques which have been...
Population III Stars 来自 adsabs.harvard.edu 喜欢 0 阅读量: 67 作者: P Murdin 摘要: A hypothetical population of stars that may have existed in the very early universe. As originally proposed, these extremely massive stars would have formed before the earliest galaxies, and have been ...
The most nitrogen-rich stars are found just below the turnoff. There is an increase in the fraction of enriched stars when the metallicity decreases. We show that the use of isochrones computed from rotating stellar models with an initial rotation that is representative of the average initial ...
而在宇宙刚诞生的时候,有一批刚诞生的恒星,这类恒星的金属元素含量为0,它们只比宇宙年轻一点,这类恒星被叫做第三星族星(星族III,Population III stars)。 目前来说,第三星族星是一类假想中的天体,科学家还未发现此类天体,虽然也发现了一些早期恒星,比如HE 0107-5240,它的年龄大约有130亿年,是人类发现的最古老的...
We explore the possibility of observing Population III (Pop~III) stars, born of the primordial gas. Pop~III stars with masses below $0.8 M_\odot$ should survive to date though are not observed yet, but the existence of stars with low metallicity as [Fe/H]$ < -5$ in the Milky Way...
Recent simulations of Population III star formation have suggested that some fraction form in binary systems, in addition to having a characteristic mass of tens of solar masses. The deaths of metal-free stars result in the initial chemical enrichment of the universe and the production of the ...
The Nucleosynthetic Signature of Population III Stars: Early-TypeStars: Supernovae: GeneralGrowing evidence suggests that the first generation of stars may have been quite massive (~100-300 M_sun). ... A Heger,SE Woosley - 《Astrophysical Journal》 被引量: 370发表: 2012年 First-generation ...
We have investigated the evolution of isolated binary stars ranging from zero metallicity (Population III stars or Pop III stars) to the solar metallicity by means of so-called rapid binary population synthesis simulation. We have found that binary BHs formed from iso- lated binary stars reproduce...