Van Schuylenbergh et al. 2026, ApJ, ... Fullerene Nest ... III

Studying the fullerene nest: JWST observations of the planetary nebula Tc 1. III. Tracing fullerene-linked dust variation

S. Van Schuylenbergh (Univ. Western Ontario), J. Cami (Univ. Western Ontario), E. Peeters (Univ. Western Ontario), M.M. Giese (Univ. Western Ontario), C. Bhatt (Univ. Western Ontario), D. Van De Putte (Univ. Western Ontario), C. Baerts (Univ. Western Ontario), M.J. Barlow (Univ. Coll. London), J. Bernard-Salas (ACRI-ST, INCLASS Common Lab.), A. Candian (Univ. Amsterdam), P.B. Changala (Univ. Colorado), N.L.J. Cox (ACRI-ST), H.L. Dinerstein (Univ. Texas), V.J. Esposito (Chapman Univ.), D.A. Garcia-Hernandez (Inst. Astrof. Canarias, Univ. La Laguna), M.A. Gomez-Munoz (Univ. Barcelona), K. Justtanont (Chalmers Univ. of Tech), K.E. Kraemer (Boston Coll.), E. Lagadec (Obs. Cote d'Azur), A. Manchado (Inst. Astrof. Canarias, Univ. La Laguna), A. Monreal Ibero (Leiden Univ.), R. Sahai (JPL), A. Sidhu (Univ. Western Ontario), G.C. Sloan (STScI, UNC Chapel Hill), N.C. Sterling (Univ. W. Georgia), A.G.G.M. Tielens (Univ. Maryland), J.R. Walsh (ESO), R. Wesson (Univ. Coll. London, Cardiff Univ.), J.C. Whitman (Univ. W. Georgia), A. Zijlstra (Univ. Manchester)

2026, ApJ, submitted

We have observed the fullerene-rich planetary nebula Tc 1 with the MIRI/MRS on JWST. The mid-infrared spectra of this spatially resolved source reveal that the dust emission is not co-spatial with the fullerene emission. Three broad features can be distinguished: a 6-9 µm plateau, a 9-13 µm plateau and the 30 µm feature. The 6-9 µm plateau does not change shape spectrally across the entire field of view, indicating it is produced by stochastically heated material. Spectral variations of the 9-13 µm plateau reveal at least three distinct components, peaking at 9.5 µm, 11 µm and 12 µm respectively. SiC produces most likely at least the 11 µm component and we find evidence that the 12 µm component might be produced by SiC grains too. The variation in relative strength of these components across the field of view hints at dust processing taking place in Tc 1. The 9.5 µm component of the 9-13 µm plateau has a strong correlation with the SiC component(s) and is thus likely produced by similar material.

Home Library