RT Journal Article
T1 UV Monochromatic Imaging of the Protoplanetary Nebula Hen 3-1475 Using HST STIS
A1 Fang, Xuan
A1 Guerrero, Martín
A1 Gómez de Castro, Ana Inés
A1 Toalá, Jesús
A1 Balick, Bruce
A1 Riera, Angels
AB 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.
PB https://www.mdpi.com/
SN 2075-4434
YR 2018
FD 2018
LK https://hdl.handle.net/20.500.14352/19118
UL https://hdl.handle.net/20.500.14352/19118
LA eng
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NO Ministerio de Economía y Competitividad (MINECO)/FEDER
NO UNAM DGAPA PAPITT
DS Docta Complutense
RD 29 abr 2024