Date: 10/4/2023
Arxiv: Uncovering the MIR emission of quiescent galaxies with JWST
Published: 10/2/2023 10:50:51 PM
Updated: 10/2/2023 10:50:51 PM
Paper abstract: We present a study of the mid-IR (MIR) emission of quiescent galaxies (QGs)beyond the local universe. Using deep JWST imaging in the SMACS-0723 clusterfield we identify a mass limited (M_{*} >10^{9}M_{\odot}) sample ofintermediate redshift QGs (0.2 5 \mum, can beattributed to different dust continuum levels and/or the presence of PolycyclicAromatic Hydrocarbons (PAHs) features. The latter would indicate enhanced 11.3-and 12.7 \mum PAHs strengths with respect to those at 6.2- and 7.7 \mum,consistent with the observed spectra of local ellipticals and indicative ofsoft radiation fields. Finally, we augment the average UV-to-MIR spectrum ofthe population with cold dust and gas emission in the far-IR/mm and construct apanchromatic UV-to-radio SED that can serve as a template for the futureexploration of the interstellar medium of z>0 QGs with ALMA and JWST.
