UV Monochromatic Imaging of the Protoplanetary Nebula Hen 3-1475 Using HST STIS



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Fang, Xuan and Guerrero, Martín and Gómez de Castro, Ana Inés and Toalá, Jesús and Balick, Bruce and Riera, Angels (2018) UV Monochromatic Imaging of the Protoplanetary Nebula Hen 3-1475 Using HST STIS. Galaxies, 6 (4). p. 141. ISSN 2075-4434

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Official URL: https://doi.org/10.3390/galaxies6040141


Collimated outflows and jets play a critical role in shaping planetary nebulae (PNe), especially in the brief transition from a spherical AGB envelope to an aspherical PN, which is called the protoplanetary nebula (pPN) phase. We present UV observations of Hen 3-1475, a bipolar pPN with fast, highly collimated jets, obtained with STIS on board the Hubble Space Telescope (HST). The deep, low-dispersion spectroscopy enabled monochromatic imaging of Hen 3-1475 in different UV nebular emission lines; this is the first of such attempt ever conducted for a pPN. The northwest inner knot (NW1) is resolved into four components in Mg II λ2800. Through comparison analysis with the HST optical narrowband images obtained 6 yr earlier, we found that these components of NW1 hardly move, despite of a negative gradient of high radial velocities, from −1550 km s−1 on the innermost component to ∼−300 km s−1 on the outermost. These NW1 knot components might thus be quasi-stationary shocks near the tip of the conical outflow of Hen 3-1475.

Item Type:Article
Uncontrolled Keywords:Late stage stellar evolution; Planetary nebulae; Theory and observation
Palabras clave (otros idiomas):Evolución estelar; Nebulosas
Subjects:Sciences > Physics
Sciences > Physics > Astrophysics
ID Code:63189
Deposited On:30 Nov 2020 14:58
Last Modified:01 Dec 2020 08:52

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