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arXiv 0710.5035astro-ph
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射电强与射电静类星体的NIR到UV连续体

The NIR to UV continuum of radio loud vs. radio quiet quasars

Marzia Labita, Aldo Treves, Renato Falomo

摘要:

从一个同样出现在2 MASS巡天中的SDSS类星体样本开始,我们研究了从近红外到紫外的8个波段中观测到的大约1000个天体的连续谱特性。我们构建了平均谱能量分布(SED)和比较和对比的连续的射电大声(RLQ)和射电安静(RQQ)的对象。两个种群的SED显著不同,RLQ更红,在10^14.5和10^15.35 Hz之间的光谱范围内,幂律光谱指数<alpha(RLQ)>=-0.55+/-0.04和<alpha(RQQ)>=-0.31+/-0.01。这种差异是根据不同的反射率,不同的磁盘温度,或非热分量的斜率进行讨论。

英文摘要:

Starting from a sample of SDSS quasars appearing also in the 2MASS survey, we study the continuum properties of about 1000 objects observed in 8 bands, from NIR to UV. We construct the mean spectral energy distribution (SED) and compare and contrast the continua of radio loud (RLQ) and radio quiet (RQQ) objects. The SEDs of the two populations are significantly different in the sense that RLQs are redder, with power law spectral indices <alpha(RLQ)>=-0.55+/-0.04 and <alpha(RQQ)>=-0.31+/-0.01 in the spectral range between 10^14.5 and 10^15.35 Hz. This difference is discussed in terms of different extinctions, different disc temperatures, or slopes of the non-thermal component.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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