Uncovering the MIR emission of quiescent galaxies with JWST

D. 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

doi:10.1051/0004-6361/202347771

Uncovering the MIR emission of quiescent galaxies with JWST

D. 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

^*Corresponding author for this work

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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_* > 10⁹ M_⊙) sample of intermediate redshift QGs (0.2 < z < 0.7) and perform modelling of their rest-frame UV to MIR photometry. We find that QGs exhibit a range of MIR spectra that are composed of a stellar continuum and a dust component that is 1–2 orders of magnitude fainter than that of star-forming galaxies. The observed scatter in the MIR spectra, especially at λ_rest > 5 μm, can be attributed to different dust continuum levels and/or the presence of polycyclic aromatic hydrocarbon (PAH) features. The latter would indicate enhanced 11.3 and 12.7 μm PAH strengths with respect to those at 6.2 and 7.7 μm, 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/millimetre, 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.

Original language	English
Article number	L2
Journal	Astronomy and Astrophysics
Volume	679
Number of pages	7
ISSN	0004-6361
DOIs	https://doi.org/10.1051/0004-6361/202347771
Publication status	Published - 2023

Keywords

Dust
Extinction
Galaxies: ISM
Galaxies: photometry

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Blánquez-Sesé, D., Magdis, G. E., Gómez-Guijarro, C., Shuntov, M., Kokorev, V., Brammer, G., Valentino, F., Díaz-Santos, T., Paspaliaris, E. D., Rigopoulou, D., Hjorth, J., Langeroodi, D., Gobat, R., Jin, S., Sillassen, N. B., Gillman, S., Greve, T. R., & Lee, M. (2023). Uncovering the MIR emission of quiescent galaxies with JWST. Astronomy and Astrophysics, 679, Article L2. https://doi.org/10.1051/0004-6361/202347771

@article{f9ad0d6a8d6941e1b35101ba7f05b969,

title = "Uncovering the MIR emission of quiescent galaxies with JWST",

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* > 109 M⊙) sample of intermediate redshift QGs (0.2 < z < 0.7) and perform modelling of their rest-frame UV to MIR photometry. We find that QGs exhibit a range of MIR spectra that are composed of a stellar continuum and a dust component that is 1–2 orders of magnitude fainter than that of star-forming galaxies. The observed scatter in the MIR spectra, especially at λrest > 5 μm, can be attributed to different dust continuum levels and/or the presence of polycyclic aromatic hydrocarbon (PAH) features. The latter would indicate enhanced 11.3 and 12.7 μm PAH strengths with respect to those at 6.2 and 7.7 μm, 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/millimetre, 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.",

keywords = "Dust, Extinction, Galaxies: ISM, Galaxies: photometry",

author = "D. Bl{\'a}nquez-Ses{\'e} and Magdis, {G. E.} and C. G{\'o}mez-Guijarro and M. Shuntov and V. Kokorev and G. Brammer and F. Valentino and T. D{\'i}az-Santos and Paspaliaris, {E. D.} and D. Rigopoulou and J. Hjorth and D. Langeroodi and R. Gobat and S. Jin and Sillassen, {N. B.} and S. Gillman and Greve, {T. R.} and M. Lee",

year = "2023",

doi = "10.1051/0004-6361/202347771",

language = "English",

volume = "679",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

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Blánquez-Sesé, D , Magdis, GE, Gómez-Guijarro, C, Shuntov, M, Kokorev, V, Brammer, G, Valentino, F, Díaz-Santos, T, Paspaliaris, ED, Rigopoulou, D, Hjorth, J, Langeroodi, D, Gobat, R, Jin, S , Sillassen, NB , Gillman, S , Greve, TR & Lee, M 2023, 'Uncovering the MIR emission of quiescent galaxies with JWST', Astronomy and Astrophysics, vol. 679, L2. https://doi.org/10.1051/0004-6361/202347771

TY - JOUR

T1 - Uncovering the MIR emission of quiescent galaxies with JWST

AU - Blánquez-Sesé, D.

AU - Magdis, G. E.

AU - Gómez-Guijarro, C.

AU - Shuntov, M.

AU - Kokorev, V.

AU - Brammer, G.

AU - Valentino, F.

AU - Díaz-Santos, T.

AU - Paspaliaris, E. D.

AU - Rigopoulou, D.

AU - Hjorth, J.

AU - Langeroodi, D.

AU - Gobat, R.

AU - Jin, S.

AU - Sillassen, N. B.

AU - Gillman, S.

AU - Greve, T. R.

AU - Lee, M.

PY - 2023

Y1 - 2023

N2 - 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* > 109 M⊙) sample of intermediate redshift QGs (0.2 < z < 0.7) and perform modelling of their rest-frame UV to MIR photometry. We find that QGs exhibit a range of MIR spectra that are composed of a stellar continuum and a dust component that is 1–2 orders of magnitude fainter than that of star-forming galaxies. The observed scatter in the MIR spectra, especially at λrest > 5 μm, can be attributed to different dust continuum levels and/or the presence of polycyclic aromatic hydrocarbon (PAH) features. The latter would indicate enhanced 11.3 and 12.7 μm PAH strengths with respect to those at 6.2 and 7.7 μm, 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/millimetre, 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.

AB - 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* > 109 M⊙) sample of intermediate redshift QGs (0.2 < z < 0.7) and perform modelling of their rest-frame UV to MIR photometry. We find that QGs exhibit a range of MIR spectra that are composed of a stellar continuum and a dust component that is 1–2 orders of magnitude fainter than that of star-forming galaxies. The observed scatter in the MIR spectra, especially at λrest > 5 μm, can be attributed to different dust continuum levels and/or the presence of polycyclic aromatic hydrocarbon (PAH) features. The latter would indicate enhanced 11.3 and 12.7 μm PAH strengths with respect to those at 6.2 and 7.7 μm, 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/millimetre, 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.

KW - Dust

KW - Extinction

KW - Galaxies: ISM

KW - Galaxies: photometry

U2 - 10.1051/0004-6361/202347771

DO - 10.1051/0004-6361/202347771

M3 - Journal article

AN - SCOPUS:85176805460

SN - 0004-6361

VL - 679

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - L2

ER -

Uncovering the MIR emission of quiescent galaxies with JWST

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Keywords

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