The nature of the galaxy around 3C 48
The nature of the galaxy around 3C 48
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DOI：
10.1086/115887
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发表时间：
1991-08
期刊：
影响因子：
--
通讯作者：
A. Stockton;S. Ridgway
中科院分区：
文献类型：
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作者：
A. Stockton;S. Ridgway
新的图像中提出的类星体3C 48的无线带中心在0.58，0.77，和2.1微米和窄带中心的禁O III 5007线。仔细的轮廓减法的连续图像显示了一个明显的光度峰值中心约1 arcsec东北的类星体的位置，这是暂时确定为星系的核心合并过程中与主星系3C 48。向西北方向延伸的弧形结构似乎是与伴星系有关的潮汐尾。虽然3C 48的宿主星系正在相互作用的确认与3C 48和类似物体在超亮星暴星系和经典类星体之间过渡的推断是一致的，但远红外光谱特性和光学形态之间的明显相关性表明，假定的“过渡”特征可能持续至少10到8年，因此，像3C 48这样的天体在演化情景中的位置取决于类星体活动的典型寿命。参考文献38篇。
New images are presented of the QSO 3C 48 in line-free bands centered at 0.58, 0.77, and 2.1 microns and in a narrowband centered on the forbidden O III5007 line. Careful profile subtraction of the continuum images shows an apparent luminosity peak centered about 1 arcsec northeast of the QSO position, which is tentatively identified as the nucleus of a galaxy in the process of merging with the host galaxy of 3C 48. The arclike structure extending to the northwest appears to be a tidal tail associated with the companion galaxy. While the confirmation that the host galaxy of 3C 48 is interacting is consistent with the inference that 3C 48 and similar objects are transitional between ultraluminous starburst galaxies and classical QSOs, an apparent correlation between far-infrared spectral properties and optical morphology suggests that the supposed 'transitional' characteristics may persist for at least 10 to the 8th yr, so the place of objects like 3C 48 in an evolutionary scenario depends on the typical lifetime of QSO activity. 38 refs.