Aleman, I;
Leal-Ferreira, ML;
Cami, J;
Akras, S;
Ochsendorf, B;
Wesson, R;
Morisset, C;
... Tielens, AGGM; + view all
(2019)
Characterization of the planetary nebula Tc 1 based on VLT X-shooter observations.
Monthly Notices of the Royal Astronomical Society
, 490
(2)
pp. 2475-2494.
10.1093/mnras/stz2654.
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Abstract
We present a detailed analysis of deep VLT/X-Shooter observations of the planetary nebula Tc 1. We calculate gas temperature, density, extinction, and abundances for several species from the empirical analysis of the total line fluxes. In addition, a spatially resolved analysis of the most intense lines provides the distribution of such quantities across the nebula. The new data reveal that several lines exhibit a double peak spectral profile consistent with the blue and redshifted components of an expanding spherical shell. The study of such components allowed us to construct for the first time a three-dimensional morphological model, which reveals that Tc 1 is a slightly elongated spheroid with an equatorial density enhancement seen almost pole on. A few bright lines present extended wings (with velocities up to a few hundred km s−1), but the mechanism producing them is not clear. We constructed photoionization models for the main shell of Tc 1. The models predict the central star temperature and luminosity, as well as the nebular density and abundances similar to previous studies. Our models indicate that Tc 1 is located at a distance of approximately 2 kpc. We report the first detection of the [Kr III] 6825 Å emission line, from which we determine the Krypton abundance. Our model indicates that the main shell of Tc 1 is matter bounded; leaking H ionizing photons may explain the ionization of its faint AGB-remnant halo.
| Type: | Article |
|---|---|
| Title: | Characterization of the planetary nebula Tc 1 based on VLT X-shooter observations |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stz2654 |
| Publisher version: | https://doi.org/10.1093/mnras/stz2654 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | circumstellar matter, ISM: abundances; planetary nebulae: general, planetary nebulae: individual: Tc 1 |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10087698 |
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