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• W2010931772 endingPage "981" @default.
• W2010931772 startingPage "955" @default.
• W2010931772 abstract "Tomographic and 3-D analyses for extended, emission-line objects are applied to long-slit ESO NTT + EMMI high-resolution spectra of the intriguing planetary nebula NGC 7009, covered at twelve position angles. We derive the gas expansion law, the diagnostics and ionic radial profiles, the distance and the central star parameters, the nebular photo-ionization model and the spatial recovery of the plasma structure and evolution. The Saturn Nebula ( kpc, yr, ionized ) consists of several interconnected components, characterized by different morphology, physical conditions, excitation and kinematics. We identify four “large-scale”, mean-to-high excitation sub–systems (the internal shell, the main shell, the outer shell and the halo), and as many “small-scale” ones: the caps (strings of low-excitation knots within the outer shell), the ansae (polar, low-excitation, likely shocked layers), the streams (high-excitation polar regions connecting the main shell with the ansae), and an equatorial, medium-to-low excitation pseudo-ring within the outer shell. The internal shell, the main shell, the streams and the ansae expand at ´´ km s-1, the outer shell, the caps and the equatorial pseudo-ring at ´´ km s-1, and the halo at km s-1. We compare the radial distribution of the physical conditions and the line fluxes observed in the eight sub-systems with the theoretical profiles coming from the photo-ionization code CLOUDY, inferring that all the spectral characteristics of NGC 7009 are explainable in terms of photo-ionization by the central star, a hot () and luminous () 0.60–0.61 post–AGB star in the hydrogen-shell nuclear burning phase. The 3–D shaping of the Saturn Nebula is discussed within an evolutionary scenario dominated by photo-ionization and supported by the fast stellar wind: it begins with the superwind ejection (first isotropic, then polar deficient), passes through the neutral, transition phase (lasting 3000 yr), the ionization start (occurred 2000 yr ago), and the full ionization of the main shell (1000 yr ago), at last reaching the present days: the whole nebula is optically thin to the UV stellar flux, except the caps (mean latitude condensations in the outer shell, shadowed by the main shell) and the ansae (supersonic ionization fronts along the major axis)." @default.
• W2010931772 created "2016-06-24" @default.
• W2010931772 creator A5039361562 @default.
• W2010931772 creator A5040365078 @default.
• W2010931772 creator A5050993892 @default.
• W2010931772 creator A5059156687 @default.
• W2010931772 creator A5088264234 @default.
• W2010931772 date "2004-03-01" @default.
• W2010931772 modified "2023-09-27" @default.
• W2010931772 title "The 3-D ionization structure and evolution of NGC 7009 (Saturn Nebula)" @default.
• W2010931772 cites W1535662833 @default.
• W2010931772 cites W1617827352 @default.
• W2010931772 cites W1625625702 @default.
• W2010931772 cites W1638521604 @default.
• W2010931772 cites W1679491571 @default.
• W2010931772 cites W1965963809 @default.
• W2010931772 cites W1967670950 @default.
• W2010931772 cites W1974482988 @default.
• W2010931772 cites W1978348925 @default.
• W2010931772 cites W1979692684 @default.
• W2010931772 cites W1983739897 @default.
• W2010931772 cites W1983882313 @default.
• W2010931772 cites W1986510200 @default.
• W2010931772 cites W1991267384 @default.
• W2010931772 cites W1994286391 @default.
• W2010931772 cites W1994830597 @default.
• W2010931772 cites W1998329609 @default.
• W2010931772 cites W2001161507 @default.
• W2010931772 cites W2001604777 @default.
• W2010931772 cites W2001752470 @default.
• W2010931772 cites W2002212346 @default.
• W2010931772 cites W2004645596 @default.
• W2010931772 cites W2007316292 @default.
• W2010931772 cites W2008140750 @default.
• W2010931772 cites W2011639947 @default.
• W2010931772 cites W2011905696 @default.
• W2010931772 cites W2013635611 @default.
• W2010931772 cites W2015237104 @default.
• W2010931772 cites W2015382955 @default.
• W2010931772 cites W2015693161 @default.
• W2010931772 cites W2016216111 @default.
• W2010931772 cites W2019176177 @default.
• W2010931772 cites W2028068504 @default.
• W2010931772 cites W2028096596 @default.
• W2010931772 cites W2032672297 @default.
• W2010931772 cites W2033708242 @default.
• W2010931772 cites W2035208273 @default.
• W2010931772 cites W204192878 @default.
• W2010931772 cites W2042063731 @default.
• W2010931772 cites W2042747798 @default.
• W2010931772 cites W2044243716 @default.
• W2010931772 cites W2046112669 @default.
• W2010931772 cites W2047522384 @default.
• W2010931772 cites W2052639258 @default.
• W2010931772 cites W2052862546 @default.
• W2010931772 cites W2054066284 @default.
• W2010931772 cites W2059146776 @default.
• W2010931772 cites W2059173264 @default.
• W2010931772 cites W2060736785 @default.
• W2010931772 cites W2064265671 @default.
• W2010931772 cites W2065805451 @default.
• W2010931772 cites W2066217040 @default.
• W2010931772 cites W2068749264 @default.
• W2010931772 cites W2068928940 @default.
• W2010931772 cites W2069401424 @default.
• W2010931772 cites W2070352550 @default.
• W2010931772 cites W2071499046 @default.
• W2010931772 cites W2071825401 @default.
• W2010931772 cites W2081087406 @default.
• W2010931772 cites W2086105334 @default.
• W2010931772 cites W2086686775 @default.
• W2010931772 cites W2088153665 @default.
• W2010931772 cites W2089662520 @default.
• W2010931772 cites W2089884523 @default.
• W2010931772 cites W2094681822 @default.
• W2010931772 cites W2100073869 @default.
• W2010931772 cites W2115008877 @default.
• W2010931772 cites W2116702916 @default.
• W2010931772 cites W2128892565 @default.
• W2010931772 cites W2135507455 @default.
• W2010931772 cites W2142607336 @default.
• W2010931772 cites W2145598109 @default.
• W2010931772 cites W2328307403 @default.
• W2010931772 cites W2334365444 @default.
• W2010931772 cites W2616330056 @default.
• W2010931772 cites W2915101821 @default.
• W2010931772 cites W3015454127 @default.
• W2010931772 cites W3098606209 @default.
• W2010931772 cites W3099684551 @default.
• W2010931772 cites W3099767877 @default.
• W2010931772 cites W3100971321 @default.
• W2010931772 cites W3101334447 @default.
• W2010931772 cites W3103061576 @default.
• W2010931772 cites W3103529535 @default.
• W2010931772 cites W3110709559 @default.
• W2010931772 cites W3122984784 @default.
• W2010931772 cites W3123586210 @default.
• W2010931772 cites W3125215205 @default.

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