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首页> 外文期刊>The Astrophysical journal >Correlations Between Mid-infrared, Far-infrared, Hα, And Fuv Luminositiesfor Spitzer Swire Field Galaxies
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Correlations Between Mid-infrared, Far-infrared, Hα, And Fuv Luminositiesfor Spitzer Swire Field Galaxies

机译：Spitzer Swire场星系的中红外，远红外Hα和Fuv光度之间的相关性

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摘要

We present and analyze the correlations between mid-infrared (MIR), far-infrared (FIR), total-infrared (TIR), Hα, and far-UV (FUV) luminosities for star-forming galaxies, composite galaxies, and AGNs, based on a large sample of galaxies selected from the Spitzer SWIRE fields. The MIR luminosities of star-forming galaxies are well correlated with their Hα, TIR, and FUV luminosities, and we rescaled the MIR-derived SFR formulae according to the above correlations with differences less than 15%. We confirm the recent result by Calzetti and coworkers that the combined observed Hα + 24 μm luminosities L(Hα_(obs) + 24 μm) possess very tight correlation with the extinction-corrected Ha luminosities L(Hα_(corr)) for star-forming and even for dwarf galaxies, and show that the combined L(Hα_(obs) + 8 μm [dust]) are also tightly correlated with L(Hα_(corr)) for the above sample galaxies. Among all the L(MIR)-L(FIR) correlations for star-forming galaxies, the L(24 μm) versus L(70 μm) and L(8 μm[dust]) versus L(160 μm) are the tightest and also nearly linear. The former could be related to young massive star formation, while the latter might be relevant to diffuse dust emissions heated by old stellar populations. Composite galaxies and AGNs have higher MIR-to-Hα/MIR-to-FUV luminosity ratios than star-forming galaxies, nevertheless their correlations among MIR, FIR, and TIR luminosities are completely following those of star-forming galaxies.
机译：我们介绍并分析了恒星形成星系，复合星系和AGN的中红外（MIR），远红外（FIR），全红外（TIR），Hα和远紫外（FUV）光度之间的相关性，基于从Spitzer SWIRE字段中选择的大量星系样本。恒星形成星系的MIR光度与它们的Hα，TIR和FUV光度有很好的相关性，我们根据上述相关性对MIR衍生的SFR公式进行了换算，其差异小于15％。我们确认了Calzetti及其同事的最新结果，即观测到的Hα+ 24μm发光度L（Hα_（obs）+ 24μm）的组合与消光校正后的恒星形成的Ha发光度L（Hα_（corr））具有非常紧密的相关性甚至对于矮星系，也表明上述样本星系的合并L（Hα_（obs）+ 8μm[灰尘]）也与L（Hα_（corr））紧密相关。在所有有关恒星形成星系的L（MIR）-L（FIR）相关性中，L（24μm）对L（70μm）和L（8μm[灰尘]）对L（160μm）最紧密，也接近线性。前者可能与年轻的大规模恒星形成有关，而后者可能与由老恒星群体加热而产生的弥散尘埃排放有关。复合星系和AGN的MIR与Hα/ MIR与FUV的光度比要比恒星系高，但它们在MIR，FIR和TIR光度之间的相关性完全遵循恒星系。

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