Fang X., Gómez de Castro A.I., Toalá J.A., & Riera A., HST STIS UV Spectroscopic Observations of the Protoplanetary Nebula Hen3-1475, 2018, The American Astronomical Society, 865, L23

Fang X., Gómez de Castro A.I., Toalá J.A., & Riera A., HST STIS UV Spectroscopic Observations of the Protoplanetary Nebula Hen3-1475, 2018, The American Astronomical Society, 865, L23

ADS: TheAstrophysical Journal Letters, 865, L23 (2018)

 

Abstract

We present UV spectra of the protoplanetary nebula (pPN) Hen 3-1475 obtained with the Space Telescope Imaging Spectrograph (STIS) on board the Hubble Space Telescope (HST). Our deep, low-dispersion spectroscopy enables monochromatic imaging of Hen 3-1475 in ultraviolet (UV) nebular emission lines, the first of such attempt ever made for a pPN. The high spatial resolution of STIS imaging allows an unprecedentedly sharp view of the S-shaped jet, especially the inner NW1 knot, which is resolved into four components in Mg II λ2800. Through critical comparison with HST optical narrowband images, we found a negative radial velocity gradient in NW1, from ‑1550 km s‑1 on its innermost component to ∼‑300 km s‑1 on the outermost. Despite their high radial velocities, these components of NW1 mostly show no obvious (or very small) proper motions, indicating that they might be quasi-stationary shocks near the tip of the conical flow along the collimated jet of Hen 3-1475.

Fang X., Gómez de Castro A.I., Toalá J.A., & Riera A., HST STIS UV Spectroscopic Observations of the Protoplanetary Nebula Hen3-1475, 2018, The American Astronomical Society, 865, L23

Guerrero M.A., Fang X., Miller Bertolami M.M., Ramos-Larios G., Todt H., Alarie A., Sabin L., Miranda L.F., Morisset C., Kehrig C., & Zavala S.A., The Inside-out Planetary Nebula around a Born-again Star, 2018, Nature Astronomy, 2, 784

Kwok, S. Science Education in the 21st Century, 2018, Nature Astronomy, 2, 530

Fang X., Zhang Y., Kwok S., Hsia C.-H., Chau W., Ramos-Larios G., & Guerrero M.A., Extended Structures of Planetary Nebulae in H 2 Emission, 2018, The Astrophysical Journal, 859, 92

Kwok, S. On the Origin of Morphological Structures of Planetary Nebulae, 2018, Galaxies, 6, 66

Fang X., García-Benito R., Guerrero M.A., Zhang Y., Liu X.-W., Morisset C., Karakas A.I., Miller Bertolami M.M., Yuan H.-B., & Cabrera-Lavers A.L., Chemical Abundances of Planetary Nebulae in the Substructures of M31 – II. The Extended Sample and a Comparison Study with the Outer-disk Group, 2018, The Astrophysical Journal, 853, 50

<< Page 1 of 1 >>