IAA authors:
Guerrero, M. A.;Alfaro, E. J.
Authors:
Guerrero, M. A.;Ortiz, R.;Sabin, L.;Ramos-Larios, G.;Alfaro, E. J.
Journal:
Monthly Notices of the Royal Astronomical Society
Abstract:
The INT Photometric Hα Survey (IPHAS) has provided us with a number of new-emission line sources, among which planetary nebulae (PNe) constitute an important fraction. Here we present a detailed analysis of the IPHAS nebula Sab 19 (IPHASX J055242.8+262116) based on radio, infrared, and optical images and intermediate- and high-dispersion longslit spectra. Sab 19 consists of a roundish 0.10 pc in radius double-shell nebula surrounded by a much larger 2.8 pc in radius external shell with a prominent H-shaped filament. We confirm the nature of the main nebula as a PN whose sub-solar N/O ratio abundances, low ionized mass, peculiar radial velocity, and low-mass central star allow us to catalog it as a type III PN. Apparently, the progenitor star of Sab 19 became a PN when crossing the Perseus Arm during a brief visit of a few Myr. The higher N/O ratio and velocity shift ≃40 km s<SUP>-1</SUP> of the external shell with respect to the main nebula and its large ionized mass suggest that it is not truly associated with Sab 19, but it is rather dominated by a Strömgren zone in the interstellar medium ionized by the PN central star.
URL:
https://ui.adsabs.harvard.edu/#abs/2021MNRAS.501.3594G/abstract
Keywords:
planetary nebulae: general;planetary nebulae: individual: Sab 19;Astrophysics - Solar and Stellar Astrophysics;Astrophysics - Astrophysics of Galaxies