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

Downloads

Downloads per month over past year

63189

Impacto

Downloads

Downloads per month over past year

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

[thumbnail of galaxies-06-00141-v2.pdf]
Preview
PDF
Creative Commons Attribution.

1MB

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




Abstract

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

Origin of downloads

Repository Staff Only: item control page