论文标题
IPHAS来源的详细研究。 ii。 SAB 19，一个真正的行星星云及其模仿perseeus手臂
Detailed Studies of IPHAS sources. II. Sab 19, a true planetary nebula and its mimic crossing the Perseus Arm
论文作者
论文摘要
INT光度H $α$调查（IPHAS）为我们提供了许多新排放线来源，其中行星星云（PNE）构成了重要的部分。在这里，我们对基于无线电，红外和光学图像以及中间和高分散的longsplit Splatra的IPHAS NEBULA SAB \，19（IPHASSX \，J055242.8+262116）进行了详细分析。 Sab \，19由半径双壳星云组成的圆形0.10 PC组成，被半径较大的2.8 PC包围，其半径为外壳，具有突出的H形灯丝。我们证实了主星云的性质为PN，其亚磨度N/O比丰度，低电离质量，特殊的径向速度和低质量中心星的性质使我们能够将其分类为IIII型PN。显然，Sab \，19岁的祖细胞之星在短暂拜访几名Myr时越过珀尔修斯的手臂时成为PN。相对于主星云及其较大的离子化质量，较高的N/O比和速度移动$ 40 \ simeq $ 40 \ kms \表明它并不是真正与Sab \，19的真正相关，但它与PN中央pn Irominion Inivilsizedströmgren区域相当主导。
The INT Photometric H$α$ Survey (IPHAS) has provided us with a number of new-emission line sources, among which planetary nebulae (PNe) constitute an important fraction. Here we present a detailed analysis of the IPHAS nebula Sab\,19 (IPHASX\,J055242.8+262116) based on radio, infrared, and optical images and intermediate- and high-dispersion longslit spectra. Sab\,19 consists of a roundish 0.10 pc in radius double-shell nebula surrounded by a much larger 2.8 pc in radius external shell with a prominent H-shaped filament. We confirm the nature of the main nebula as a PN whose sub-solar N/O ratio abundances, low ionized mass, peculiar radial velocity, and low-mass central star allow us to catalog it as a type III PN. Apparently, the progenitor star of Sab\,19 became a PN when crossing the Perseus Arm during a brief visit of a few Myr. The higher N/O ratio and velocity shift $\simeq$40 \kms\ of the external shell with respect to the main nebula and its large ionized mass suggest that it is not truly associated with Sab\,19, but it is rather dominated by a Strömgren zone in the interstellar medium ionized by the PN central star.
