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- W3102510157 abstract "We present narrowband Hα, [S II], and [O I] Hubble Space Telescope images of the young planetary nebula GL 618. This object is a compact, bipolar nebula that is currently undergoing the transition from asymptotic giant branch star to planetary nebula. Our images confirm the presence of at least three highly collimated outflows emanating from the central regions of GL 618. We also detect Hα emission close to the central dust lane and in an extended scattered light halo. The three outflows are occurring simultaneously in this object as opposed to being the result of a precessing jet. We derive an inclination for the brightest outflow in the east lobe of 39° ± 4°. This differs from the previous estimate of 45°. In addition, our results indicate that the outflows seen in GL 618 are probably not coplanar. Line strengths derived from the narrowband images indicate a shock velocity in the range of 40-100 km s-1. Based on the shock velocity, we estimate that the age of the outflows is less than 500 yr. The outflows seen in the optical images of GL 618 are related to features seen in near-IR, CO, and CS maps of this object. This relationship indicates that the outflows are playing a major role in the morphological evolution of this young planetary nebula, interacting with and shaping the neutral envelope surrounding GL 618. We discuss the implications of these jets and their interaction with the neutral envelope in the context of current models of planetary nebula formation." @default.
- W3102510157 created "2020-11-23" @default.
- W3102510157 creator A5089019948 @default.
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- W3102510157 date "2002-11-10" @default.
- W3102510157 modified "2023-09-24" @default.
- W3102510157 title "Multiple Collimated Outflows in the Proto–Planetary Nebula GL 618" @default.
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- W3102510157 doi "https://doi.org/10.1086/342943" @default.
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