High-Resolution Spectroscopy of the Planetary Nebulae PM 1–242, PM 1–318 and PM 1–322

Publications of the Astronomical Society of Australia

L. F. Miranda¹ 

[1] R. Vázquez

关键词: circumstellar matter;    ISM: jets and outflows;    planetary nebulae: individual (PM 1-242;    PM 1-318;    PM 1-322);   

DOI  :  10.1071/AS09029

学科分类：天文学(综合)

来源: CSIRO

【 摘 要 】

We have recently confirmed the planetary nebula (PN) nature of PM 1–242, PM 1–318 and PM 1–322. Here we present high-resolution long-slit spectra of these three PNe in order to analyze their internal kinematics and to investigate their physical structure. PM 1–242 is a tilted ring and not an elliptical PN as suggested by direct images. The object is probably related to ring-like PNe and shows an unusual pointsymmetric brightness distribution in the ring. PM 1–318 is a pole-on elliptical PN, instead of a circular one as suggested by direct images. PM 1–322 is spatially unresolved and its spectrum shows large differences between the forbidden lines and Hα profiles, with the latter showing a double-peaked profile and relatively extended wings (FWZI ~325 km s−1). These properties are found in other PNe that are suspected to host a symbiotic central star.

【 授权许可】

Unknown