Remarkably Compact Quiescent Candidates at 3 < z < 5 in JWST-CEERS

In this Letter, we measure the rest-frame optical and near-infrared sizes of 10 quiescent candidates at 3 < z < 5, first reported by Carnall et al. We use James Webb Space Telescope Near-Infrared Camera F277W and F444W imaging obtained through the public CEERS Early Release Science program and...
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Autor*in:	Lillian Wright [verfasserIn] Katherine E. Whitaker [verfasserIn] John R. Weaver [verfasserIn] Sam E. Cutler [verfasserIn] Bingjie Wang [verfasserIn] Adam Carnall [verfasserIn] Katherine A. Suess [verfasserIn] Rachel Bezanson [verfasserIn] Erica Nelson [verfasserIn] Tim B. Miller [verfasserIn] Kei Ito [verfasserIn] Francesco Valentino [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2024

Schlagwörter:	Quenched galaxies Galaxy formation Galaxy evolution

Übergeordnetes Werk:	In: The Astrophysical Journal Letters - IOP Publishing, 2022, 964(2024), 1, p L10
Übergeordnetes Werk:	volume:964 ; year:2024 ; number:1, p L10

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3847/2041-8213/ad2b6d

Katalog-ID:	DOAJ097194131

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allfields	10.3847/2041-8213/ad2b6d doi (DE-627)DOAJ097194131 (DE-599)DOAJ092189aa92a340b9b9d79c09c79690ed DE-627 ger DE-627 rakwb eng QB460-466 Lillian Wright verfasserin aut Remarkably Compact Quiescent Candidates at 3 < z < 5 in JWST-CEERS 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this Letter, we measure the rest-frame optical and near-infrared sizes of 10 quiescent candidates at 3 < z < 5, first reported by Carnall et al. We use James Webb Space Telescope Near-Infrared Camera F277W and F444W imaging obtained through the public CEERS Early Release Science program and imcascade , an astronomical fitting code that utilizes multi-Gaussian expansion, to carry out our size measurements. When compared to the extrapolation of rest-optical size–mass relations for quiescent galaxies at lower redshift, 8 out of 10 candidates in our sample (80%) are on average more compact by ∼40%. A total of 7 out of 10 candidates (70%) exhibit rest-frame infrared sizes ∼10% smaller than rest-frame optical sizes, indicative of negative color gradients. Two candidates (20%) have rest-frame infrared sizes ∼1.4× larger than rest-frame optical sizes; one of these candidates exhibits signs of ongoing or residual star formation, suggesting this galaxy may not be fully quenched. The remaining candidate is unresolved in both filters, which may indicate an active galactic nucleus. Strikingly, we observe three of the most massive galaxies in the sample (log( M _⋆ / M _⊙ ) = 10.74–10.95) are extremely compact, with effective radii ∼0.7 kpc. Our findings provide no indication that the size evolution relation flattens out, and may indicate that the size evolution of quiescent galaxies is steeper than previously anticipated beyond z < 3. Quenched galaxies Galaxy formation Galaxy evolution Astrophysics Katherine E. Whitaker verfasserin aut John R. Weaver verfasserin aut Sam E. Cutler verfasserin aut Bingjie Wang verfasserin aut Adam Carnall verfasserin aut Katherine A. Suess verfasserin aut Rachel Bezanson verfasserin aut Erica Nelson verfasserin aut Tim B. Miller verfasserin aut Kei Ito verfasserin aut Francesco Valentino verfasserin aut In The Astrophysical Journal Letters IOP Publishing, 2022 964(2024), 1, p L10 (DE-627)312189028 (DE-600)2006858-X 20418213 nnns volume:964 year:2024 number:1, p L10 https://doi.org/10.3847/2041-8213/ad2b6d kostenfrei https://doaj.org/article/092189aa92a340b9b9d79c09c79690ed kostenfrei https://doi.org/10.3847/2041-8213/ad2b6d kostenfrei https://doaj.org/toc/2041-8205 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2014 GBV_ILN_2088 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 964 2024 1, p L10
spelling	10.3847/2041-8213/ad2b6d doi (DE-627)DOAJ097194131 (DE-599)DOAJ092189aa92a340b9b9d79c09c79690ed DE-627 ger DE-627 rakwb eng QB460-466 Lillian Wright verfasserin aut Remarkably Compact Quiescent Candidates at 3 < z < 5 in JWST-CEERS 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this Letter, we measure the rest-frame optical and near-infrared sizes of 10 quiescent candidates at 3 < z < 5, first reported by Carnall et al. We use James Webb Space Telescope Near-Infrared Camera F277W and F444W imaging obtained through the public CEERS Early Release Science program and imcascade , an astronomical fitting code that utilizes multi-Gaussian expansion, to carry out our size measurements. When compared to the extrapolation of rest-optical size–mass relations for quiescent galaxies at lower redshift, 8 out of 10 candidates in our sample (80%) are on average more compact by ∼40%. A total of 7 out of 10 candidates (70%) exhibit rest-frame infrared sizes ∼10% smaller than rest-frame optical sizes, indicative of negative color gradients. Two candidates (20%) have rest-frame infrared sizes ∼1.4× larger than rest-frame optical sizes; one of these candidates exhibits signs of ongoing or residual star formation, suggesting this galaxy may not be fully quenched. The remaining candidate is unresolved in both filters, which may indicate an active galactic nucleus. Strikingly, we observe three of the most massive galaxies in the sample (log( M _⋆ / M _⊙ ) = 10.74–10.95) are extremely compact, with effective radii ∼0.7 kpc. Our findings provide no indication that the size evolution relation flattens out, and may indicate that the size evolution of quiescent galaxies is steeper than previously anticipated beyond z < 3. Quenched galaxies Galaxy formation Galaxy evolution Astrophysics Katherine E. Whitaker verfasserin aut John R. Weaver verfasserin aut Sam E. Cutler verfasserin aut Bingjie Wang verfasserin aut Adam Carnall verfasserin aut Katherine A. Suess verfasserin aut Rachel Bezanson verfasserin aut Erica Nelson verfasserin aut Tim B. Miller verfasserin aut Kei Ito verfasserin aut Francesco Valentino verfasserin aut In The Astrophysical Journal Letters IOP Publishing, 2022 964(2024), 1, p L10 (DE-627)312189028 (DE-600)2006858-X 20418213 nnns volume:964 year:2024 number:1, p L10 https://doi.org/10.3847/2041-8213/ad2b6d kostenfrei https://doaj.org/article/092189aa92a340b9b9d79c09c79690ed kostenfrei https://doi.org/10.3847/2041-8213/ad2b6d kostenfrei https://doaj.org/toc/2041-8205 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2014 GBV_ILN_2088 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 964 2024 1, p L10
allfields_unstemmed	10.3847/2041-8213/ad2b6d doi (DE-627)DOAJ097194131 (DE-599)DOAJ092189aa92a340b9b9d79c09c79690ed DE-627 ger DE-627 rakwb eng QB460-466 Lillian Wright verfasserin aut Remarkably Compact Quiescent Candidates at 3 < z < 5 in JWST-CEERS 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this Letter, we measure the rest-frame optical and near-infrared sizes of 10 quiescent candidates at 3 < z < 5, first reported by Carnall et al. We use James Webb Space Telescope Near-Infrared Camera F277W and F444W imaging obtained through the public CEERS Early Release Science program and imcascade , an astronomical fitting code that utilizes multi-Gaussian expansion, to carry out our size measurements. When compared to the extrapolation of rest-optical size–mass relations for quiescent galaxies at lower redshift, 8 out of 10 candidates in our sample (80%) are on average more compact by ∼40%. A total of 7 out of 10 candidates (70%) exhibit rest-frame infrared sizes ∼10% smaller than rest-frame optical sizes, indicative of negative color gradients. Two candidates (20%) have rest-frame infrared sizes ∼1.4× larger than rest-frame optical sizes; one of these candidates exhibits signs of ongoing or residual star formation, suggesting this galaxy may not be fully quenched. The remaining candidate is unresolved in both filters, which may indicate an active galactic nucleus. Strikingly, we observe three of the most massive galaxies in the sample (log( M _⋆ / M _⊙ ) = 10.74–10.95) are extremely compact, with effective radii ∼0.7 kpc. Our findings provide no indication that the size evolution relation flattens out, and may indicate that the size evolution of quiescent galaxies is steeper than previously anticipated beyond z < 3. Quenched galaxies Galaxy formation Galaxy evolution Astrophysics Katherine E. Whitaker verfasserin aut John R. Weaver verfasserin aut Sam E. Cutler verfasserin aut Bingjie Wang verfasserin aut Adam Carnall verfasserin aut Katherine A. Suess verfasserin aut Rachel Bezanson verfasserin aut Erica Nelson verfasserin aut Tim B. Miller verfasserin aut Kei Ito verfasserin aut Francesco Valentino verfasserin aut In The Astrophysical Journal Letters IOP Publishing, 2022 964(2024), 1, p L10 (DE-627)312189028 (DE-600)2006858-X 20418213 nnns volume:964 year:2024 number:1, p L10 https://doi.org/10.3847/2041-8213/ad2b6d kostenfrei https://doaj.org/article/092189aa92a340b9b9d79c09c79690ed kostenfrei https://doi.org/10.3847/2041-8213/ad2b6d kostenfrei https://doaj.org/toc/2041-8205 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2014 GBV_ILN_2088 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 964 2024 1, p L10
allfieldsGer	10.3847/2041-8213/ad2b6d doi (DE-627)DOAJ097194131 (DE-599)DOAJ092189aa92a340b9b9d79c09c79690ed DE-627 ger DE-627 rakwb eng QB460-466 Lillian Wright verfasserin aut Remarkably Compact Quiescent Candidates at 3 < z < 5 in JWST-CEERS 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this Letter, we measure the rest-frame optical and near-infrared sizes of 10 quiescent candidates at 3 < z < 5, first reported by Carnall et al. We use James Webb Space Telescope Near-Infrared Camera F277W and F444W imaging obtained through the public CEERS Early Release Science program and imcascade , an astronomical fitting code that utilizes multi-Gaussian expansion, to carry out our size measurements. When compared to the extrapolation of rest-optical size–mass relations for quiescent galaxies at lower redshift, 8 out of 10 candidates in our sample (80%) are on average more compact by ∼40%. A total of 7 out of 10 candidates (70%) exhibit rest-frame infrared sizes ∼10% smaller than rest-frame optical sizes, indicative of negative color gradients. Two candidates (20%) have rest-frame infrared sizes ∼1.4× larger than rest-frame optical sizes; one of these candidates exhibits signs of ongoing or residual star formation, suggesting this galaxy may not be fully quenched. The remaining candidate is unresolved in both filters, which may indicate an active galactic nucleus. Strikingly, we observe three of the most massive galaxies in the sample (log( M _⋆ / M _⊙ ) = 10.74–10.95) are extremely compact, with effective radii ∼0.7 kpc. Our findings provide no indication that the size evolution relation flattens out, and may indicate that the size evolution of quiescent galaxies is steeper than previously anticipated beyond z < 3. Quenched galaxies Galaxy formation Galaxy evolution Astrophysics Katherine E. Whitaker verfasserin aut John R. Weaver verfasserin aut Sam E. Cutler verfasserin aut Bingjie Wang verfasserin aut Adam Carnall verfasserin aut Katherine A. Suess verfasserin aut Rachel Bezanson verfasserin aut Erica Nelson verfasserin aut Tim B. Miller verfasserin aut Kei Ito verfasserin aut Francesco Valentino verfasserin aut In The Astrophysical Journal Letters IOP Publishing, 2022 964(2024), 1, p L10 (DE-627)312189028 (DE-600)2006858-X 20418213 nnns volume:964 year:2024 number:1, p L10 https://doi.org/10.3847/2041-8213/ad2b6d kostenfrei https://doaj.org/article/092189aa92a340b9b9d79c09c79690ed kostenfrei https://doi.org/10.3847/2041-8213/ad2b6d kostenfrei https://doaj.org/toc/2041-8205 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2014 GBV_ILN_2088 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 964 2024 1, p L10
allfieldsSound	10.3847/2041-8213/ad2b6d doi (DE-627)DOAJ097194131 (DE-599)DOAJ092189aa92a340b9b9d79c09c79690ed DE-627 ger DE-627 rakwb eng QB460-466 Lillian Wright verfasserin aut Remarkably Compact Quiescent Candidates at 3 < z < 5 in JWST-CEERS 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this Letter, we measure the rest-frame optical and near-infrared sizes of 10 quiescent candidates at 3 < z < 5, first reported by Carnall et al. We use James Webb Space Telescope Near-Infrared Camera F277W and F444W imaging obtained through the public CEERS Early Release Science program and imcascade , an astronomical fitting code that utilizes multi-Gaussian expansion, to carry out our size measurements. When compared to the extrapolation of rest-optical size–mass relations for quiescent galaxies at lower redshift, 8 out of 10 candidates in our sample (80%) are on average more compact by ∼40%. A total of 7 out of 10 candidates (70%) exhibit rest-frame infrared sizes ∼10% smaller than rest-frame optical sizes, indicative of negative color gradients. Two candidates (20%) have rest-frame infrared sizes ∼1.4× larger than rest-frame optical sizes; one of these candidates exhibits signs of ongoing or residual star formation, suggesting this galaxy may not be fully quenched. The remaining candidate is unresolved in both filters, which may indicate an active galactic nucleus. Strikingly, we observe three of the most massive galaxies in the sample (log( M _⋆ / M _⊙ ) = 10.74–10.95) are extremely compact, with effective radii ∼0.7 kpc. Our findings provide no indication that the size evolution relation flattens out, and may indicate that the size evolution of quiescent galaxies is steeper than previously anticipated beyond z < 3. Quenched galaxies Galaxy formation Galaxy evolution Astrophysics Katherine E. Whitaker verfasserin aut John R. Weaver verfasserin aut Sam E. Cutler verfasserin aut Bingjie Wang verfasserin aut Adam Carnall verfasserin aut Katherine A. Suess verfasserin aut Rachel Bezanson verfasserin aut Erica Nelson verfasserin aut Tim B. Miller verfasserin aut Kei Ito verfasserin aut Francesco Valentino verfasserin aut In The Astrophysical Journal Letters IOP Publishing, 2022 964(2024), 1, p L10 (DE-627)312189028 (DE-600)2006858-X 20418213 nnns volume:964 year:2024 number:1, p L10 https://doi.org/10.3847/2041-8213/ad2b6d kostenfrei https://doaj.org/article/092189aa92a340b9b9d79c09c79690ed kostenfrei https://doi.org/10.3847/2041-8213/ad2b6d kostenfrei https://doaj.org/toc/2041-8205 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2014 GBV_ILN_2088 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 964 2024 1, p L10
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authorswithroles_txt_mv	Lillian Wright @@aut@@ Katherine E. Whitaker @@aut@@ John R. Weaver @@aut@@ Sam E. Cutler @@aut@@ Bingjie Wang @@aut@@ Adam Carnall @@aut@@ Katherine A. Suess @@aut@@ Rachel Bezanson @@aut@@ Erica Nelson @@aut@@ Tim B. Miller @@aut@@ Kei Ito @@aut@@ Francesco Valentino @@aut@@
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callnumber-first	Q - Science
author	Lillian Wright
spellingShingle	Lillian Wright misc QB460-466 misc Quenched galaxies misc Galaxy formation misc Galaxy evolution misc Astrophysics Remarkably Compact Quiescent Candidates at 3 < z < 5 in JWST-CEERS
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topic_title	QB460-466 Remarkably Compact Quiescent Candidates at 3 < z < 5 in JWST-CEERS Quenched galaxies Galaxy formation Galaxy evolution
topic	misc QB460-466 misc Quenched galaxies misc Galaxy formation misc Galaxy evolution misc Astrophysics
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title	Remarkably Compact Quiescent Candidates at 3 < z < 5 in JWST-CEERS
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author_browse	Lillian Wright Katherine E. Whitaker John R. Weaver Sam E. Cutler Bingjie Wang Adam Carnall Katherine A. Suess Rachel Bezanson Erica Nelson Tim B. Miller Kei Ito Francesco Valentino
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title_sort	remarkably compact quiescent candidates at 3 < z < 5 in jwst-ceers
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title_auth	Remarkably Compact Quiescent Candidates at 3 < z < 5 in JWST-CEERS
abstract	In this Letter, we measure the rest-frame optical and near-infrared sizes of 10 quiescent candidates at 3 < z < 5, first reported by Carnall et al. We use James Webb Space Telescope Near-Infrared Camera F277W and F444W imaging obtained through the public CEERS Early Release Science program and imcascade , an astronomical fitting code that utilizes multi-Gaussian expansion, to carry out our size measurements. When compared to the extrapolation of rest-optical size–mass relations for quiescent galaxies at lower redshift, 8 out of 10 candidates in our sample (80%) are on average more compact by ∼40%. A total of 7 out of 10 candidates (70%) exhibit rest-frame infrared sizes ∼10% smaller than rest-frame optical sizes, indicative of negative color gradients. Two candidates (20%) have rest-frame infrared sizes ∼1.4× larger than rest-frame optical sizes; one of these candidates exhibits signs of ongoing or residual star formation, suggesting this galaxy may not be fully quenched. The remaining candidate is unresolved in both filters, which may indicate an active galactic nucleus. Strikingly, we observe three of the most massive galaxies in the sample (log( M _⋆ / M _⊙ ) = 10.74–10.95) are extremely compact, with effective radii ∼0.7 kpc. Our findings provide no indication that the size evolution relation flattens out, and may indicate that the size evolution of quiescent galaxies is steeper than previously anticipated beyond z < 3.
abstractGer	In this Letter, we measure the rest-frame optical and near-infrared sizes of 10 quiescent candidates at 3 < z < 5, first reported by Carnall et al. We use James Webb Space Telescope Near-Infrared Camera F277W and F444W imaging obtained through the public CEERS Early Release Science program and imcascade , an astronomical fitting code that utilizes multi-Gaussian expansion, to carry out our size measurements. When compared to the extrapolation of rest-optical size–mass relations for quiescent galaxies at lower redshift, 8 out of 10 candidates in our sample (80%) are on average more compact by ∼40%. A total of 7 out of 10 candidates (70%) exhibit rest-frame infrared sizes ∼10% smaller than rest-frame optical sizes, indicative of negative color gradients. Two candidates (20%) have rest-frame infrared sizes ∼1.4× larger than rest-frame optical sizes; one of these candidates exhibits signs of ongoing or residual star formation, suggesting this galaxy may not be fully quenched. The remaining candidate is unresolved in both filters, which may indicate an active galactic nucleus. Strikingly, we observe three of the most massive galaxies in the sample (log( M _⋆ / M _⊙ ) = 10.74–10.95) are extremely compact, with effective radii ∼0.7 kpc. Our findings provide no indication that the size evolution relation flattens out, and may indicate that the size evolution of quiescent galaxies is steeper than previously anticipated beyond z < 3.
abstract_unstemmed	In this Letter, we measure the rest-frame optical and near-infrared sizes of 10 quiescent candidates at 3 < z < 5, first reported by Carnall et al. We use James Webb Space Telescope Near-Infrared Camera F277W and F444W imaging obtained through the public CEERS Early Release Science program and imcascade , an astronomical fitting code that utilizes multi-Gaussian expansion, to carry out our size measurements. When compared to the extrapolation of rest-optical size–mass relations for quiescent galaxies at lower redshift, 8 out of 10 candidates in our sample (80%) are on average more compact by ∼40%. A total of 7 out of 10 candidates (70%) exhibit rest-frame infrared sizes ∼10% smaller than rest-frame optical sizes, indicative of negative color gradients. Two candidates (20%) have rest-frame infrared sizes ∼1.4× larger than rest-frame optical sizes; one of these candidates exhibits signs of ongoing or residual star formation, suggesting this galaxy may not be fully quenched. The remaining candidate is unresolved in both filters, which may indicate an active galactic nucleus. Strikingly, we observe three of the most massive galaxies in the sample (log( M _⋆ / M _⊙ ) = 10.74–10.95) are extremely compact, with effective radii ∼0.7 kpc. Our findings provide no indication that the size evolution relation flattens out, and may indicate that the size evolution of quiescent galaxies is steeper than previously anticipated beyond z < 3.
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title_short	Remarkably Compact Quiescent Candidates at 3 < z < 5 in JWST-CEERS
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We use James Webb Space Telescope Near-Infrared Camera F277W and F444W imaging obtained through the public CEERS Early Release Science program and imcascade , an astronomical fitting code that utilizes multi-Gaussian expansion, to carry out our size measurements. When compared to the extrapolation of rest-optical size–mass relations for quiescent galaxies at lower redshift, 8 out of 10 candidates in our sample (80%) are on average more compact by ∼40%. A total of 7 out of 10 candidates (70%) exhibit rest-frame infrared sizes ∼10% smaller than rest-frame optical sizes, indicative of negative color gradients. Two candidates (20%) have rest-frame infrared sizes ∼1.4× larger than rest-frame optical sizes; one of these candidates exhibits signs of ongoing or residual star formation, suggesting this galaxy may not be fully quenched. The remaining candidate is unresolved in both filters, which may indicate an active galactic nucleus. 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Remarkably Compact Quiescent Candidates at 3 < z < 5 in JWST-CEERS

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