Discovery of a Fast-expanding Shell in the Inside-out Born-again Planetary Nebula HuBi 1 through High-dispersion Integral Field Spectroscopy

DOI: 
10.3847/2041-8213/abbe22
Publication date: 
20/11/2020
Main author: 
Rechy-García J.S.
IAA authors: 
Guerrero, M.A.;Cazzoli, S.;Miranda, L.F.
Authors: 
Rechy-García J.S., Guerrero M.A., Santamaría E., Gómez-González V.M.A., Ramos-Larios G., Toalá J.A., Cazzoli S., Sabin L., Miranda L.F., Fang X., Liu J.
Journal: 
Astrophysical Journal Letters
Refereed: 
Yes
Publication type: 
Article
Volume: 
903.0
Pages: 
L4
Number: 
L4
Abstract: 
HuBi 1 has been proposed to be member of the rare class of born-again planetary nebulae (PNe), i.e., its central star experienced a very late thermal pulse and ejected highly processed material at high speeds inside the old hydrogen-rich PN. In this Letter we present GTC MEGARA integral field spectroscopic observations of the innermost regions of HuBi 1 at high spectral resolution ≃16 km s-1 and multi-epoch subarcsecond images obtained ≃12 yr apart. The analysis of these data indicates that the inner regions of HuBi 1 were ejected ≃200 yr ago and expand at velocities ≃300 km s-1, in excellent agreement with the born-again scenario. The unprecedented tomographic capabilities of the GTC MEGARA high-dispersion observations used here reveal that the ejecta in HuBi 1 has a shell-like structure, in contrast to the disrupted disk and jet morphology of the ejecta in other born-again PNe. © 2020. The American Astronomical Society. All rights reserved.
Database: 
SCOPUS
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/2020ApJ...903L...4R/abstract
ADS Bibcode: 
2020ApJ...903L...4R