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arXiv · 2310.01601

Uncovering the MIR emission of quiescent galaxies with $JWST$

David Blánquez-Sesé·G. E. Magdis·C. Gómez-Guijarro·M. Shuntov·V. Kokorev·G. Brammer·F. Valentino·T. Díaz-Santos·E. -D. Paspaliaris·D. Rigopoulou·J. Hjorth·D. Langeroodi·R. Gobat·S. Jin·N. B. Sillassen·S. Gillman·T. R. Greve·M. Lee
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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 cluster field we identify a mass limited ($M_{*} >10^{9}$M$_{\odot}$) sample of intermediate redshift QGs ($0.2 5 \mu$m, can be attributed to different dust continuum levels and/or the presence of Polycyclic Aromatic Hydrocarbons (PAHs) features. The latter would indicate enhanced 11.3- and 12.7 $\mu$m PAHs strengths with respect to those at 6.2- and 7.7$ \mu$m, consistent with the observed spectra of local ellipticals and indicative of soft radiation fields. Finally, we augment the average UV-to-MIR spectrum of the population with cold dust and gas emission in the far-IR/mm and construct a panchromatic UV-to-radio SED that can serve as a template for the future exploration of the interstellar medium of $z>0$ QGs with ALMA and $JWST$.

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David Blánquez-Sesé, G. E. Magdis, C. Gómez-Guijarro, M. Shuntov, V. Kokorev, G. Brammer, F. Valentino, T. Díaz-Santos, E. -D. Paspaliaris, D. Rigopoulou, J. Hjorth, D. Langeroodi, R. Gobat, S. Jin, N. B. Sillassen, S. Gillman, T. R. Greve, M. Lee. 2023-10-02. Uncovering the MIR emission of quiescent galaxies with $JWST$. https://doi.org/10.1051/0004-6361/202347771

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