The crystalline fraction of interstellar silicates in starburst galaxies

The crystalline fraction of interstellar silicates in starburst galaxies
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星暴星系中星际硅酸盐的结晶部分

DOI:
10.1111/j.1365-2966.2011.18204.x
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发表时间:
2010
影响因子:
4.8
通讯作者:
P. Woods
P. Woods
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
F. Kemper;A. Markwick;P. Woods

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我们提出了一个模型,利用星暴星系中恒星种群的演化来预测该星系星际介质中硅酸盐的结晶度。我们考虑到恒星喷出物中的尘埃产生,以及星际介质中的非晶化和破坏,发现可能形成可检测数量的晶体硅酸盐,特别是在高恒星形成率的情况下,如果超新星是有效的尘埃生产者。我们讨论了超新星对尘埃破坏和非晶化的影响,以及超新星产生尘埃的低效率的影响,并发现当考虑到这一点时,星际介质中的结晶度变得难以检测。在星爆星系的星际介质中已经观察到6.5 - 13%的结晶度,因此我们得出结论,并非所有这些晶体硅酸盐都是恒星起源的,与活动星系核相关的晶体硅酸盐的额外来源必须存在。
We present a model using the evolution of the stellar population in a starburst galaxy to predict the crystallinity of the silicates in the interstellar medium of this galaxy. We take into account dust production in stellar ejecta, and amorphization and destruction in the interstellar medium and find that a detectable amount of crystalline silicates may be formed, particularly at high star formation rates, and in case supernovae are efficient dust producers. We discuss the effect of dust destruction and amorphization by supernovae, and the effect of a low dust-production efficiency by supernovae, and find that when taking this into account, crystallinity in the interstellar medium becomes hard to detect. Levels of 6.5–13 per cent crystallinity in the interstellar medium of starburst galaxies have been observed and thus we conclude that not all these crystalline silicates can be of stellar origin, and an additional source of crystalline silicates associated with the active galactic nucleus must be present.
斯皮策对年轻核心塌陷超新星遗迹 1E0102-72.3 的观测:红外喷射物发射和灰尘形成
DOI: --
发表时间: 2009
期刊: ApJ 700
影响因子: --
作者:
Rho;J.
通讯作者: J.