双极原行星状星云Hen 3-1475（花园喷水壶星云）的高分辨率光谱学
High-resolution spectroscopy of the bipolar proto-planetary nebula Hen 3-1475, the Garden Sprinkler Nebula
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中文总结 AI 辅助
对原行星状星云Hen 3-1475中心区域光谱分析，揭示恒星发射线等，计算恒星风终端速度，用特定谱线作气体密度指标，对比不同年份观测有差异，还展示对NW1结观测，其光谱变化，未现部分电离线。
中文摘要 AI 辅助
对2006年和2024年获得的原行星状星云Hen 3-1475中心区域光学和近红外范围内的高分辨率光谱进行了详细分析。光谱主要揭示了氢巴尔末和帕邢系列的恒星发射、铁线（Fe I、Fe II和[Fe II]）以及其他重要的He I、Ca II、[Ca II]和O I线。计算出恒星风的终端速度高达约800 km/s。用[Fe II]和Fe I线作为气体密度指标。未识别出行星状星云的光致电离星云线。比较2006年和2024年的观测发现一些显著差异，最重要的可能是从中心区域喷出新喷流以及在Hα附近检测到宽成分。还展示了2024年8月对NW1结的高光谱分辨率观测，该结显示出受激气体的典型光谱，其发射发生了变化，目前未显示2006年报告的[O III] 5007和其他电离线。
英文摘要
A detailed analysis of high-resolution spectra in the optical and near-infrared range of the central zone of the proto-planetary nebula Hen 3-1475, obtained in 2006 and 2024, is conducted. The spectrum primarily revealed stellar emission of H Balmer and Paschen series, lines of iron (Fe I, Fe II, and [Fe II]), and other significant lines of He I, Ca II, [Ca II], and O I. Several multiplets of Fe II, the H Balmer series, Ca II H and K, Na I D and He I lines exhibit P-Cygni profiles and bump-like features, which are clear indicators of strong stellar winds. The terminal velocity of the winds was calculated, reaching values up to ~ 800 km/s. [Fe II] and Fe I lines were used as gas density indicators. In these observations, no photoionized nebular lines of planetary nebulae were identified, suggesting that the central star has not reached the temperature required to photoionize the nebula. A comparison between the observations from 2006 and 2024 reveals some few significant differences, being the most important the probably ejection of a new jet emerging from the central zone and the detection of a broad component adjacent to H α, probably originating from emission associated with a jet at 700 km/s. High-spectral resolution observations of the knot NW1 obtained on August 2024, are also presented. This knot shows a typical spectrum of shocked gas. The emission of this knot has changed, presently not showing [O III] 5007 and other ionized lines that were reported in 2006.
