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Emission and Absorption in Narrow-Line Seyfert 1 Galaxies

机译:窄线Seyfert 1 Galaxies中的排放和吸收

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The emission and absorption attributes of the UV-blue nuclear spectra of the Narrow-Line Seyfert 1 (NLS1) galaxies are analyzed based on high quality archival HST observations. Measurements from composite spectra as well as from individual sources reveal differences from the more general AGN samples: NLS1s have steeper (redder) UV-blue continua. Objects with UV line absorption show redder spectra, suggesting that internal dust is important in modifying the continuum shapes. A strong relationship is found between the slopes of the power-laws that best fit the UV-blue continua and the luminosities: the more luminous sources have bluer SEDs. This trend is possibly attributed to a luminosity-dependent inner geometry of the obscuring (dusty) material.
机译:基于高质量的档案HST观察,分析了窄线Seyfert 1(NLS1)星系的UV-Blue核光谱的发射和吸收属性。复合光谱以及来自个体来源的测量揭示了更一般的AGN样品的差异:NLS1S具有陡峭的(Redder)UV-Blue Converua。具有UV线路吸收的对象显示Redder光谱,表明内部灰尘在修改连续体形状方面很重要。在最适合UV-Blue Converua和亮光的幂法的斜坡之间发现了一个强有力的关系:发光的光源具有蓝色SED。这种趋势可能归因于模糊(尘土飞扬)材料的亮度依赖性内部几何形状。

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