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
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.
URL:
https://ui.adsabs.harvard.edu/#abs/2020ApJ...903L...4R/abstract