Far-infrared emission and star formation in spiral galaxies
Far-infrared emission and star formation in spiral galaxies
复制标题
螺旋星系中的远红外发射和恒星形成
DOI：
10.1086/167634
复制
发表时间：
1989
期刊：
影响因子：
--
通讯作者：
R. Bandiera
中科院分区：
文献类型：
--
作者：
G. Trinchieri;G. Fabbiano;R. Bandiera
研究了一个正常螺旋星系样本中远红外辐射、h - α和蓝光之间的相关性。我们发现这三个波段的光度都是紧密相关的，尽管相关性的强度和它们的功能依赖关系都是星系形态类型的函数。这些相关性的最佳拟合幂律在不同数量的比较中是不同的，并且在某些情况下明显偏离线性，这意味着存在与星系质量的光度一般增加无关的附加发射机制。明确的证据表明，在晚期型螺旋中，有两种独立的效应影响温暖的远红外辐射的发生率。一种是光度效应，在较明亮的星系中，相对于h - α或光学发射存在过量的远红外线。另一个是依赖于广泛的恒星形成活动。参24。
The correlations between the emission in the far-IR, H-alpha, and blue in a sample of normal spiral galaxies are investigated. It is found that the luminosities in these three bands are all tightly correlated, although both the strength of the correlations and their functional dependencies are a function of the galaxies' morphological types. The best-fit power laws to these correlations are different for the comparison of different quantities and deviate significantly from linearity in some cases, implying the presence of additional emission mechanisms not related to the general increase of luminosity with galactic mass. Clear evidence is found of two independent effects in the incidence of warm far-IR emission in late-type spirals. One is a luminosity effect shown by the presence of excess far-IR relative to H-alpha or optical emission in the more luminous galaxies. The other is a dependence on widespread star-formation activity. 24 refs.