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Título:
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UV Monochromatic Imaging of the Protoplanetary Nebula Hen 3-1475 Using HST STIS
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Autores:
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Fang, Xuan ;
Guerrero, Martín ;
Gómez de Castro, Ana Inés ;
Toalá, Jesús ;
Balick, Bruce ;
Riera, Angels
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Tipo de documento:
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texto impreso
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Editorial:
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https://www.mdpi.com/, 2018
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Dimensiones:
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application/pdf
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Nota general:
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cc_by
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física
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Materia = Ciencias: Física: Astrofísica
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Tipo = Artículo
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Resumen:
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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 ?2800. 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.
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En línea:
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https://eprints.ucm.es/id/eprint/63189/1/galaxies-06-00141-v2.pdf
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