A Five-Band Study of Spiral Galaxies: X-Ray, Optical, Near- and Far-Infrared, and Radio Continuum Correlations
A Five-Band Study of Spiral Galaxies: X-Ray, Optical, Near- and Far-Infrared, and Radio Continuum Correlations
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螺旋星系的五波段研究：X 射线、光学、近红外、远红外以及射电连续谱相关性
DOI：
10.1086/165934
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
G. Trinchieri
中科院分区：
文献类型：
--
作者：
G. Fabbiano;I. Gioia;G. Trinchieri
统计分析了旋涡星系的射电连续谱、远红外、近红外H波段、光学(B)和X射线发射等整体发射性质之间的关系。在早型和晚型旋涡星系中观察到了不同的性质，这可以归因于前者存在显著的凸起。在晚型螺旋线中，不同波长发射的统计特性与共同的盘/臂起源一致。在低亮度星系中，这种关联的幂指数与较陡的IMF相一致，而在高亮度星系中，则与暗星暴成分的存在相一致。射电连续谱光度与任何其他变量的相关性最强的是远红外，这表明射电发射与较老的低质量恒星分量是不相交的。
A statistical analysis is given of the relationships between global emission properties of spiral galaxies, including the radio continuum, far-infared, near-infrared H-band, optical (B), and X-ray emission. Different properties are observed in early-type and in late-type spiral galaxies, which can be ascribed to the presence of prominent bulges in the former. In late-type spirals, the statistical properties of the emission at different wavelengths are consistent with a common disk/arm origin. The power-law exponents of the correlations are consistent with a steeper IMF in low-luminosity galaxies and with the presence of an obscured starburst component in high-luminosity galaxies. The strongest correlation of the radio continuum luminosity with any other variable is with the far-infrared, suggesting that the radio emission is disjoint from the older low-mass stellar component.