局部星系的紫外光谱及其与高z星群的联系

C. Leitherer
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引用次数: 3

摘要

新一代的8 - 10米级望远镜为我们提供了在宇宙距离上形成恒星的星系的静止框架紫外区的高质量光谱信息。这些数据可以用来解决诸如恒星形成历史、恒星初始质量函数、尘埃特性以及星际介质的能量学和化学等问题。我们可以通过比较高红移星系与当地宇宙中相应星系的光谱特性,从不同的角度解决这些问题。我给了最近的发展有关的观测和经验建模与最近的恒星形成的本地星系的紫外光谱的回顾。重点是年龄小于100亿光年的最年轻恒星群。将讨论当前的不确定性,并强调未来需要取得进展的领域。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ultraviolet Spectra of Local Galaxies and their Link with the High‐z Population
The new generation of 8 to 10 m class telescope is providing us with high‐quality spectral information on the rest‐frame ultraviolet region of star‐forming galaxies at cosmological distances. The data can be used to address questions such as, e.g., the star‐formation histories, the stellar initial mass function, the dust properties, and the energetics and chemistry of the interstellar medium. We can tackle these issues from a different angle by comparing the spectral properties of high‐redshift galaxies to those of their counterparts in the local universe. I give a review of recent developments related to observations and empirical modeling of the ultraviolet spectra of local galaxies with recent star formation. The emphasis is on the youngest stellar populations with ages less than 100 Myr. Current uncertainties will be discussed, and areas where progress is needed in the future are highlighted.
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