Title: New candidate Planetary Nebulae in the IPHAS survey: the case of PNe with ISM interaction Show Chinese title

Title: 新的IPHAS调查中的候选行星状星云：与星际介质相互作用的行星状星云的情况

Abstract: We present the results of the search for candidate Planetary Nebulae interacting with the interstellar medium (PN-ISM) in the framework of the INT Photometric H$\alpha$ Survey (IPHAS) and located in the right ascension range 18h-20h. The detection capability of this new Northern survey, in terms of depth and imaging resolution, has allowed us to overcome the detection problem generally associated to the low surface brightness inherent to PNe-ISM. We discuss the detection of 21 IPHAS PN-ISM candidates. Thus, different stages of interaction were observed, implying various morphologies i.e. from the unaffected to totally disrupted shapes. The majority of the sources belong to the so-called WZO2 stage which main characteristic is a brightening of the nebula's shell in the direction of motion. The new findings are encouraging as they would be a first step into the reduction of the scarcity of observational data and they would provide new insights into the physical processes occurring in the rather evolved PNe. Show Chinese abstract

Abstract: 我们展示了在INT Photometric H$\alpha$ Survey (IPHAS) 框架下，对与星际介质（PN-ISM）相互作用的候选行星状星云的搜索结果，并位于赤经范围18h-20h。 这项新的北半球调查在深度和成像分辨率方面的检测能力，使我们能够克服通常与PN-ISM固有的低表面亮度相关的检测问题。 我们讨论了21个IPHAS PN-ISM候选体的检测。 因此，观察到了不同相互作用阶段，这意味着各种形态，即从未受影响到底部破坏的形状。 大多数源属于所谓的WZO2阶段，其主要特征是星云壳在运动方向上的增亮。 这些新发现令人鼓舞，因为它们将是减少观测数据稀缺性的第一步，并且将为较为演化的PN中发生的物理过程提供新的见解。