标题： 空间扩展的 [P II]1.188um 和 [Fe II]1.257um 发射线在邻近的塞弗特星系 NGC 1068 中的观测结果通过 OAO/ISLE 显示英文标题

标题： Spatially Extended [P II]1.188um and [Fe II]1.257um Emission Lines in a Nearby Seyfert Galaxy NGC 1068 Observed with OAO/ISLE

摘要： 我们呈现了NGC 1068的J波段长缝光谱观测，NGC 1068被归类为赛弗特2型星系。 OAO/ISLE的J波段观测清晰地检测到了空间扩展的[Fe II]1.257um和[P II]1.188um谱线。 我们发现[Fe II]1.257um/[P II]1.188um随着远离中心连续谱峰的距离增加而增加。 在核周围（连续谱峰）的观测线比与光致电离模型预期的典型值一致，而在核东侧和西侧3" - 4"（210-280 pc）处的线比略高于此值。 在NGC 1068的非核区域，我们也发现了[Fe II]1.257um/[P II]1.188um与射电连续谱之间可能的关联。 这表明射电喷流外部有轻微的冲击电离贡献，而中心能源源的光致电离在核附近占主导地位。 显示英文摘要

摘要： We present J-band long-slit spectroscopic observation of NGC 1068 classified as a Seyfert 2 galaxy. J-band observations with OAO/ISLE provide clear detection of spatially extended [Fe II]1.257um and [P II]1.188um lines. We found that [Fe II]1.257um/[P II]1.188um increases with distance from a central continuum peak. Observed line ratios around the nucleus (continuum peak) are consistent with a typical value expected from photoionization models, while the ratios at 3" - 4" (210-280 pc) east and west of the nucleus are slightly higher than this. In the off nucleus region of NGC 1068 we also found a possible association between [Fe II]1.257um/[P II]1.188um and the radio continuum. This suggests a mild contribution of shock ionization induced by a radio jet outside nucleus while photoionization by the central energy source is dominant near the nucleus.