描述星系ngc1386最内层千秒内的恒星形成

G. Bruzual, Almudena Prieto, C. Magris, J. Fernández-Ontiveros
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摘要

摘要:我们通过对亚arsec分辨率下的光学、近红外和中红外多波长数据集的分析,描述了NGC 1386星系内部千秒差区域的恒星形成过程。我们探测到61个点源,分布在环绕银河系中心的半径为960pc的环中。从SED拟合中,我们得出结论,这些是低质量()年轻的星团,年龄分布在1至10迈,中位数为3.6迈。由Hα+[N ii]窄带图像得到的星团的Hα光度与拟合的电离连续体的光度比较表明,有很大一部分电离光子从星团中逸出。此外,这些光子的很大一部分从恒星形成环周围的区域逃逸。
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Characterizing star formation in the innermost kiloparsec of the galaxy NGC 1386
Abstract We characterize the star formation going on in the inner kiloparsec region of the galaxy NGC 1386 as derived from the analysis of a multiwavelength dataset covering the optical, near-IR and mid-IR at subarsec resolution. We detect 61 point sources, distributed in a ring of 960 pc radius around the center of the galaxy. From SED fitting we conclude that these are low mass () young clusters, with age distributed from 1 to 10 Myr, with median at 3.6 Myr. Comparison of the Hα luminosity of the clusters derived from the Hα+[N ii] narrow band image with that expected from the fitted ionizing continuum shows that a large fraction of the ionizing photons escapes from the clusters. Moreover, a large fraction of these photons escapes from the regions around the star forming ring.
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