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arXiv 1602.00770astro-ph.HEastro-ph.GA
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长持续时间伽马射线暴宿主星系的发射和吸收

Long-Duration Gamma-Ray Burst Host Galaxies in Emission and Absorption

Daniel A. Perley, Yuu Niino, Nial R. Tanvir, Susanna D. Vergani, Johan P. U. Fynbo

摘要:

拥有长持续时间GRB的星系群提供了一种约束祖先的方法,并提供了一个利用这些剧烈爆炸来描述高红移宇宙性质的机会。对伽玛射线暴宿主星系的辐射研究揭示了一个具有巨大多样性的恒星形成星系群,其质量、金属丰度和红移范围很广。然而,作为一个人口伽玛射线暴主机显着不那么大规模和贫穷的金属比主机的其他核心崩溃瞬变,这表明伽玛射线暴的生产是唯一有效的金属丰度显着低于太阳能。伽玛射线暴也可能更喜欢紧凑的星系,以及星系的致密和/或中心区域,而不是其他类型的核心坍缩爆炸。与此同时,研究宿主对明亮的GRB光学余辉的吸收提供了一种独特的手段,揭示了即使是最微弱和最遥远的星系中ISM的性质;这些观测有助于将星系的化学演化和星际尘埃的性质限制在非常高的红移。新的地面和空间仪器,以及更大和更仔细选择的样品的积累,不断增强我们对伽玛射线暴宿主种群的看法。

英文摘要:

The galaxy population hosting long-duration GRBs provides a means to constrain the progenitor and an opportunity to use these violent explosions to characterize the nature of the high-redshift universe. Studies of GRB host galaxies in emission reveal a population of star-forming galaxies with great diversity, spanning a wide range of masses, metallicities, and redshifts. However, as a population GRB hosts are significantly less massive and poorer in metals than the hosts of other core-collapse transients, suggesting that GRB production is only efficient at metallicities significantly below Solar. GRBs may also prefer compact galaxies, and dense and/or central regions of galaxies, more than other types of core-collapse explosion. Meanwhile, studies of hosts in absorption against the luminous GRB optical afterglow provide a unique means of unveiling properties of the ISM in even the faintest and most distant galaxies; these observations are helping to constrain the chemical evolution of galaxies and the properties of interstellar dust out to very high redshifts. New ground- and space-based instrumentation, and the accumulation of larger and more carefully-selected samples, are continually enhancing our view of the GRB host population.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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