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arXiv 0707.4002astro-ph
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斯皮策对强射电源的观测

Spitzer Observations of Powerful Radio Sources

Kieran Cleary, Charles R. Lawrence, Jason A. Marshall, Lei Hao, David Meier

摘要:

我们利用斯皮策空间望远镜上的IRS和MIPS仪器测量了一个定向无偏的强3C RR星系和类星体样品的中红外辐射。我们适合斯皮策数据以及其他测量从文献中同步加速器和尘埃成分。在15微米处,类星体通常比具有相同各向同性无线电功率的射电星系亮四倍。根据我们的拟合,这种差异的一半可以归因于类星体中非热发射的存在,而不是射电星系。另一半则与射电星系中的尘埃吸收相一致,而不是类星体。

英文摘要:

We have measured the mid-infrared radiation from an orientation-unbiased sample of powerful 3C RR galaxies and quasars using the IRS and MIPS instruments aboard the Spitzer Space Telescope. We fit the Spitzer data as well as other measurements from the literature with synchrotron and dust components. At 15 microns, quasars are typically four times brighter than radio galaxies with the same isotropic radio power. Based on our fits, half of this difference can be attributed to the presence of non-thermal emission in the quasars but not the radio galaxies. The other half is consistent with dust absorption in the radio galaxies but not the quasars.

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