Herschel-ATLAS: far-infrared properties of radio-loud and radio-quiet quasars
Herschel-ATLAS: far-infrared properties of radio-loud and radio-quiet quasars
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DOI：
10.1093/mnras/stu782
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发表时间：
2014-04
影响因子：
4.8
通讯作者：
E. Kalfountzou;J. Stevens;M. Jarvis;M. Hardcastle;D.J.B. Smith;N. Bourne;L. Dunne;E. Ibar;S. Eales;R. Ivison;S. Maddox;M.W.L. Smith;E. Valiante;G. Zotti
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文献类型：
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作者：
E. Kalfountzou;J. Stevens;M. Jarvis;M. Hardcastle;D.J.B. Smith;N. Bourne;L. Dunne;E. Ibar;S. Eales;R. Ivison;S. Maddox;M.W.L. Smith;E. Valiante;G. Zotti
我们已经构建了一个无线电响亮和无线电安静的类星体的样本，从微弱的图像无线电天空在21厘米和斯隆数字巡天数据发布7，在赫歇尔-ATLAS第一阶段的地区（9 h，12 h和14h.5）。使用叠加分析，我们发现一个显着的相关性之间的远红外（FIR）光度和1.4 GHz的光度射电响亮类星体。偏相关分析证实了去除红移贡献后的内在相关性，而对于射电安静类星体，没有发现偏相关性。使用单温度灰体模型，我们发现，射电大声类星体的尘埃温度较低的一般趋势相比，射电安静类星体。此外，射电大声类星体被发现有几乎恒定的平均值的尘埃质量沿着红移和光学光度箱。此外，我们还发现，相对于具有相同光学光度的射电宁静类星体，具有较低光学光度的射电强类星体平均具有较高的FIR和250 μm光度。即使我们使用一个双温度灰体模型来描述的FIR数据，FIR光度过剩仍然在较低的光学光度。这些结果表明，强大的射电喷流与星星形成有关，特别是在吸积率较低的情况下。
We have constructed a sample of radio-loud and radio-quiet quasars from the Faint Images Radio Sky at Twenty-one centimetres and the Sloan Digital Sky Survey Data Release 7, over the Herschel-ATLAS Phase 1 area (9h, 12h and 14h.5). Using a stacking analysis, we find a significant correlation between the far-infrared (FIR) luminosity and 1.4-GHz luminosity for radio-loud quasars. Partial correlation analysis confirms the intrinsic correlation after removing the redshift contribution, while for radio-quiet quasars, no partial correlation is found. Using a single-temperature grey-body model, we find a general trend of lower dust temperatures in case of radio-loud quasars compared to radio-quiet quasars. Also, radio-loud quasars are found to have almost constant mean values of dust mass along redshift and optical luminosity bins. In addition, we find that radio-loud quasars at lower optical luminosities tend to have on average higher FIR and 250-μm luminosity with respect to radio-quiet quasars with the same optical luminosites. Even if we use a two-temperature grey-body model to describe the FIR data, the FIR luminosity excess remains at lower optical luminosities. These results suggest that powerful radio jets are associated with star formation especially at lower accretion rates.