Early Results from GLASS-JWST. XVI. Discovering a Bluer z ∼ 4–7 Universe through UV Slopes

We use the GLASS-JWST Early Release Science NIRCam parallel observations to provide a first view of the UV continuum properties of NIRCam/F444W selected galaxies at 4 < z < 7. By combining multiwavelength NIRCam observations, we constrain the UV continuum slope for a sample of 401 galaxies wit...
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Autor*in:	Themiya Nanayakkara [verfasserIn] Karl Glazebrook [verfasserIn] Colin Jacobs [verfasserIn] Andrea Bonchi [verfasserIn] Marco Castellano [verfasserIn] Adriano Fontana [verfasserIn] Charlotte Mason [verfasserIn] Emiliano Merlin [verfasserIn] Takahiro Morishita [verfasserIn] Diego Paris [verfasserIn] Michele Trenti [verfasserIn] Tommaso Treu [verfasserIn] Antonello Calabrò [verfasserIn] Kristan Boyett [verfasserIn] Marusa Bradac [verfasserIn] Nicha Leethochawalit [verfasserIn] Danilo Marchesini [verfasserIn] Paola Santini [verfasserIn] Victoria Strait [verfasserIn] Eros Vanzella [verfasserIn] Benedetta Vulcani [verfasserIn] Xin Wang [verfasserIn] Lilian Yang [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2023

Schlagwörter:	Galaxy evolution High-redshift galaxies

Übergeordnetes Werk:	In: The Astrophysical Journal Letters - IOP Publishing, 2022, 947(2023), 2, p L26
Übergeordnetes Werk:	volume:947 ; year:2023 ; number:2, p L26

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3847/2041-8213/acbfb9

Katalog-ID:	DOAJ089460367

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allfields	10.3847/2041-8213/acbfb9 doi (DE-627)DOAJ089460367 (DE-599)DOAJ93c054a44cd946c295dba7836c71d692 DE-627 ger DE-627 rakwb eng QB460-466 Themiya Nanayakkara verfasserin aut Early Results from GLASS-JWST. XVI. Discovering a Bluer z ∼ 4–7 Universe through UV Slopes 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We use the GLASS-JWST Early Release Science NIRCam parallel observations to provide a first view of the UV continuum properties of NIRCam/F444W selected galaxies at 4 < z < 7. By combining multiwavelength NIRCam observations, we constrain the UV continuum slope for a sample of 401 galaxies with stringent quality controls. We find that <99% of the galaxies are blue star-forming galaxies with very low levels of dust ( Av _β ∼ 0.01 ± 0.33). We find no statistically significant correlation for UV slope with redshift or UV magnitude. However, we find that in general galaxies at higher redshifts and fainter UV magnitudes have steeper UV slopes. We find a statistically significant correlation for UV slope with stellar mass, with galaxies with higher stellar mass showing shallower UV slopes. Individual fits to some of our galaxies reach the bluest UV slopes of β ∼ −3.1 allowed by stellar population models used in this analysis. Therefore, it is likely that stellar population models with a higher amount of Lyman continuum leakage, active galactic nucleus effects, and/or Population III contributions are required to accurately reproduce the rest-UV and optical properties of some of our bluest galaxies. This dust-free early view confirms that our current cosmological understanding of gradual mass + dust buildup of galaxies with cosmic time is largely accurate to describe the ∼0.7–1.5 Gyr age window of the universe. The abundance of a large population of UV faint dust-poor systems may point to a dominance of low-mass galaxies at z < 6 playing a vital role in cosmic reionization. Galaxy evolution High-redshift galaxies Astrophysics Karl Glazebrook verfasserin aut Colin Jacobs verfasserin aut Andrea Bonchi verfasserin aut Marco Castellano verfasserin aut Adriano Fontana verfasserin aut Charlotte Mason verfasserin aut Emiliano Merlin verfasserin aut Takahiro Morishita verfasserin aut Diego Paris verfasserin aut Michele Trenti verfasserin aut Tommaso Treu verfasserin aut Antonello Calabrò verfasserin aut Kristan Boyett verfasserin aut Marusa Bradac verfasserin aut Nicha Leethochawalit verfasserin aut Danilo Marchesini verfasserin aut Paola Santini verfasserin aut Victoria Strait verfasserin aut Eros Vanzella verfasserin aut Benedetta Vulcani verfasserin aut Xin Wang verfasserin aut Lilian Yang verfasserin aut In The Astrophysical Journal Letters IOP Publishing, 2022 947(2023), 2, p L26 (DE-627)312189028 (DE-600)2006858-X 20418213 nnns volume:947 year:2023 number:2, p L26 https://doi.org/10.3847/2041-8213/acbfb9 kostenfrei https://doaj.org/article/93c054a44cd946c295dba7836c71d692 kostenfrei https://doi.org/10.3847/2041-8213/acbfb9 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 947 2023 2, p L26
spelling	10.3847/2041-8213/acbfb9 doi (DE-627)DOAJ089460367 (DE-599)DOAJ93c054a44cd946c295dba7836c71d692 DE-627 ger DE-627 rakwb eng QB460-466 Themiya Nanayakkara verfasserin aut Early Results from GLASS-JWST. XVI. Discovering a Bluer z ∼ 4–7 Universe through UV Slopes 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We use the GLASS-JWST Early Release Science NIRCam parallel observations to provide a first view of the UV continuum properties of NIRCam/F444W selected galaxies at 4 < z < 7. By combining multiwavelength NIRCam observations, we constrain the UV continuum slope for a sample of 401 galaxies with stringent quality controls. We find that <99% of the galaxies are blue star-forming galaxies with very low levels of dust ( Av _β ∼ 0.01 ± 0.33). We find no statistically significant correlation for UV slope with redshift or UV magnitude. However, we find that in general galaxies at higher redshifts and fainter UV magnitudes have steeper UV slopes. We find a statistically significant correlation for UV slope with stellar mass, with galaxies with higher stellar mass showing shallower UV slopes. Individual fits to some of our galaxies reach the bluest UV slopes of β ∼ −3.1 allowed by stellar population models used in this analysis. Therefore, it is likely that stellar population models with a higher amount of Lyman continuum leakage, active galactic nucleus effects, and/or Population III contributions are required to accurately reproduce the rest-UV and optical properties of some of our bluest galaxies. This dust-free early view confirms that our current cosmological understanding of gradual mass + dust buildup of galaxies with cosmic time is largely accurate to describe the ∼0.7–1.5 Gyr age window of the universe. The abundance of a large population of UV faint dust-poor systems may point to a dominance of low-mass galaxies at z < 6 playing a vital role in cosmic reionization. Galaxy evolution High-redshift galaxies Astrophysics Karl Glazebrook verfasserin aut Colin Jacobs verfasserin aut Andrea Bonchi verfasserin aut Marco Castellano verfasserin aut Adriano Fontana verfasserin aut Charlotte Mason verfasserin aut Emiliano Merlin verfasserin aut Takahiro Morishita verfasserin aut Diego Paris verfasserin aut Michele Trenti verfasserin aut Tommaso Treu verfasserin aut Antonello Calabrò verfasserin aut Kristan Boyett verfasserin aut Marusa Bradac verfasserin aut Nicha Leethochawalit verfasserin aut Danilo Marchesini verfasserin aut Paola Santini verfasserin aut Victoria Strait verfasserin aut Eros Vanzella verfasserin aut Benedetta Vulcani verfasserin aut Xin Wang verfasserin aut Lilian Yang verfasserin aut In The Astrophysical Journal Letters IOP Publishing, 2022 947(2023), 2, p L26 (DE-627)312189028 (DE-600)2006858-X 20418213 nnns volume:947 year:2023 number:2, p L26 https://doi.org/10.3847/2041-8213/acbfb9 kostenfrei https://doaj.org/article/93c054a44cd946c295dba7836c71d692 kostenfrei https://doi.org/10.3847/2041-8213/acbfb9 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 947 2023 2, p L26
allfields_unstemmed	10.3847/2041-8213/acbfb9 doi (DE-627)DOAJ089460367 (DE-599)DOAJ93c054a44cd946c295dba7836c71d692 DE-627 ger DE-627 rakwb eng QB460-466 Themiya Nanayakkara verfasserin aut Early Results from GLASS-JWST. XVI. Discovering a Bluer z ∼ 4–7 Universe through UV Slopes 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We use the GLASS-JWST Early Release Science NIRCam parallel observations to provide a first view of the UV continuum properties of NIRCam/F444W selected galaxies at 4 < z < 7. By combining multiwavelength NIRCam observations, we constrain the UV continuum slope for a sample of 401 galaxies with stringent quality controls. We find that <99% of the galaxies are blue star-forming galaxies with very low levels of dust ( Av _β ∼ 0.01 ± 0.33). We find no statistically significant correlation for UV slope with redshift or UV magnitude. However, we find that in general galaxies at higher redshifts and fainter UV magnitudes have steeper UV slopes. We find a statistically significant correlation for UV slope with stellar mass, with galaxies with higher stellar mass showing shallower UV slopes. Individual fits to some of our galaxies reach the bluest UV slopes of β ∼ −3.1 allowed by stellar population models used in this analysis. Therefore, it is likely that stellar population models with a higher amount of Lyman continuum leakage, active galactic nucleus effects, and/or Population III contributions are required to accurately reproduce the rest-UV and optical properties of some of our bluest galaxies. This dust-free early view confirms that our current cosmological understanding of gradual mass + dust buildup of galaxies with cosmic time is largely accurate to describe the ∼0.7–1.5 Gyr age window of the universe. The abundance of a large population of UV faint dust-poor systems may point to a dominance of low-mass galaxies at z < 6 playing a vital role in cosmic reionization. Galaxy evolution High-redshift galaxies Astrophysics Karl Glazebrook verfasserin aut Colin Jacobs verfasserin aut Andrea Bonchi verfasserin aut Marco Castellano verfasserin aut Adriano Fontana verfasserin aut Charlotte Mason verfasserin aut Emiliano Merlin verfasserin aut Takahiro Morishita verfasserin aut Diego Paris verfasserin aut Michele Trenti verfasserin aut Tommaso Treu verfasserin aut Antonello Calabrò verfasserin aut Kristan Boyett verfasserin aut Marusa Bradac verfasserin aut Nicha Leethochawalit verfasserin aut Danilo Marchesini verfasserin aut Paola Santini verfasserin aut Victoria Strait verfasserin aut Eros Vanzella verfasserin aut Benedetta Vulcani verfasserin aut Xin Wang verfasserin aut Lilian Yang verfasserin aut In The Astrophysical Journal Letters IOP Publishing, 2022 947(2023), 2, p L26 (DE-627)312189028 (DE-600)2006858-X 20418213 nnns volume:947 year:2023 number:2, p L26 https://doi.org/10.3847/2041-8213/acbfb9 kostenfrei https://doaj.org/article/93c054a44cd946c295dba7836c71d692 kostenfrei https://doi.org/10.3847/2041-8213/acbfb9 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 947 2023 2, p L26
allfieldsGer	10.3847/2041-8213/acbfb9 doi (DE-627)DOAJ089460367 (DE-599)DOAJ93c054a44cd946c295dba7836c71d692 DE-627 ger DE-627 rakwb eng QB460-466 Themiya Nanayakkara verfasserin aut Early Results from GLASS-JWST. XVI. Discovering a Bluer z ∼ 4–7 Universe through UV Slopes 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We use the GLASS-JWST Early Release Science NIRCam parallel observations to provide a first view of the UV continuum properties of NIRCam/F444W selected galaxies at 4 < z < 7. By combining multiwavelength NIRCam observations, we constrain the UV continuum slope for a sample of 401 galaxies with stringent quality controls. We find that <99% of the galaxies are blue star-forming galaxies with very low levels of dust ( Av _β ∼ 0.01 ± 0.33). We find no statistically significant correlation for UV slope with redshift or UV magnitude. However, we find that in general galaxies at higher redshifts and fainter UV magnitudes have steeper UV slopes. We find a statistically significant correlation for UV slope with stellar mass, with galaxies with higher stellar mass showing shallower UV slopes. Individual fits to some of our galaxies reach the bluest UV slopes of β ∼ −3.1 allowed by stellar population models used in this analysis. Therefore, it is likely that stellar population models with a higher amount of Lyman continuum leakage, active galactic nucleus effects, and/or Population III contributions are required to accurately reproduce the rest-UV and optical properties of some of our bluest galaxies. This dust-free early view confirms that our current cosmological understanding of gradual mass + dust buildup of galaxies with cosmic time is largely accurate to describe the ∼0.7–1.5 Gyr age window of the universe. The abundance of a large population of UV faint dust-poor systems may point to a dominance of low-mass galaxies at z < 6 playing a vital role in cosmic reionization. Galaxy evolution High-redshift galaxies Astrophysics Karl Glazebrook verfasserin aut Colin Jacobs verfasserin aut Andrea Bonchi verfasserin aut Marco Castellano verfasserin aut Adriano Fontana verfasserin aut Charlotte Mason verfasserin aut Emiliano Merlin verfasserin aut Takahiro Morishita verfasserin aut Diego Paris verfasserin aut Michele Trenti verfasserin aut Tommaso Treu verfasserin aut Antonello Calabrò verfasserin aut Kristan Boyett verfasserin aut Marusa Bradac verfasserin aut Nicha Leethochawalit verfasserin aut Danilo Marchesini verfasserin aut Paola Santini verfasserin aut Victoria Strait verfasserin aut Eros Vanzella verfasserin aut Benedetta Vulcani verfasserin aut Xin Wang verfasserin aut Lilian Yang verfasserin aut In The Astrophysical Journal Letters IOP Publishing, 2022 947(2023), 2, p L26 (DE-627)312189028 (DE-600)2006858-X 20418213 nnns volume:947 year:2023 number:2, p L26 https://doi.org/10.3847/2041-8213/acbfb9 kostenfrei https://doaj.org/article/93c054a44cd946c295dba7836c71d692 kostenfrei https://doi.org/10.3847/2041-8213/acbfb9 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 947 2023 2, p L26
allfieldsSound	10.3847/2041-8213/acbfb9 doi (DE-627)DOAJ089460367 (DE-599)DOAJ93c054a44cd946c295dba7836c71d692 DE-627 ger DE-627 rakwb eng QB460-466 Themiya Nanayakkara verfasserin aut Early Results from GLASS-JWST. XVI. Discovering a Bluer z ∼ 4–7 Universe through UV Slopes 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We use the GLASS-JWST Early Release Science NIRCam parallel observations to provide a first view of the UV continuum properties of NIRCam/F444W selected galaxies at 4 < z < 7. By combining multiwavelength NIRCam observations, we constrain the UV continuum slope for a sample of 401 galaxies with stringent quality controls. We find that <99% of the galaxies are blue star-forming galaxies with very low levels of dust ( Av _β ∼ 0.01 ± 0.33). We find no statistically significant correlation for UV slope with redshift or UV magnitude. However, we find that in general galaxies at higher redshifts and fainter UV magnitudes have steeper UV slopes. We find a statistically significant correlation for UV slope with stellar mass, with galaxies with higher stellar mass showing shallower UV slopes. Individual fits to some of our galaxies reach the bluest UV slopes of β ∼ −3.1 allowed by stellar population models used in this analysis. Therefore, it is likely that stellar population models with a higher amount of Lyman continuum leakage, active galactic nucleus effects, and/or Population III contributions are required to accurately reproduce the rest-UV and optical properties of some of our bluest galaxies. This dust-free early view confirms that our current cosmological understanding of gradual mass + dust buildup of galaxies with cosmic time is largely accurate to describe the ∼0.7–1.5 Gyr age window of the universe. The abundance of a large population of UV faint dust-poor systems may point to a dominance of low-mass galaxies at z < 6 playing a vital role in cosmic reionization. Galaxy evolution High-redshift galaxies Astrophysics Karl Glazebrook verfasserin aut Colin Jacobs verfasserin aut Andrea Bonchi verfasserin aut Marco Castellano verfasserin aut Adriano Fontana verfasserin aut Charlotte Mason verfasserin aut Emiliano Merlin verfasserin aut Takahiro Morishita verfasserin aut Diego Paris verfasserin aut Michele Trenti verfasserin aut Tommaso Treu verfasserin aut Antonello Calabrò verfasserin aut Kristan Boyett verfasserin aut Marusa Bradac verfasserin aut Nicha Leethochawalit verfasserin aut Danilo Marchesini verfasserin aut Paola Santini verfasserin aut Victoria Strait verfasserin aut Eros Vanzella verfasserin aut Benedetta Vulcani verfasserin aut Xin Wang verfasserin aut Lilian Yang verfasserin aut In The Astrophysical Journal Letters IOP Publishing, 2022 947(2023), 2, p L26 (DE-627)312189028 (DE-600)2006858-X 20418213 nnns volume:947 year:2023 number:2, p L26 https://doi.org/10.3847/2041-8213/acbfb9 kostenfrei https://doaj.org/article/93c054a44cd946c295dba7836c71d692 kostenfrei https://doi.org/10.3847/2041-8213/acbfb9 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 947 2023 2, p L26
language	English
source	In The Astrophysical Journal Letters 947(2023), 2, p L26 volume:947 year:2023 number:2, p L26
sourceStr	In The Astrophysical Journal Letters 947(2023), 2, p L26 volume:947 year:2023 number:2, p L26
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Galaxy evolution High-redshift galaxies Astrophysics
isfreeaccess_bool	true
container_title	The Astrophysical Journal Letters
authorswithroles_txt_mv	Themiya Nanayakkara @@aut@@ Karl Glazebrook @@aut@@ Colin Jacobs @@aut@@ Andrea Bonchi @@aut@@ Marco Castellano @@aut@@ Adriano Fontana @@aut@@ Charlotte Mason @@aut@@ Emiliano Merlin @@aut@@ Takahiro Morishita @@aut@@ Diego Paris @@aut@@ Michele Trenti @@aut@@ Tommaso Treu @@aut@@ Antonello Calabrò @@aut@@ Kristan Boyett @@aut@@ Marusa Bradac @@aut@@ Nicha Leethochawalit @@aut@@ Danilo Marchesini @@aut@@ Paola Santini @@aut@@ Victoria Strait @@aut@@ Eros Vanzella @@aut@@ Benedetta Vulcani @@aut@@ Xin Wang @@aut@@ Lilian Yang @@aut@@
publishDateDaySort_date	2023-01-01T00:00:00Z
hierarchy_top_id	312189028
id	DOAJ089460367
language_de	englisch
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author	Themiya Nanayakkara
spellingShingle	Themiya Nanayakkara misc QB460-466 misc Galaxy evolution misc High-redshift galaxies misc Astrophysics Early Results from GLASS-JWST. XVI. Discovering a Bluer z ∼ 4–7 Universe through UV Slopes
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topic_title	QB460-466 Early Results from GLASS-JWST. XVI. Discovering a Bluer z ∼ 4–7 Universe through UV Slopes Galaxy evolution High-redshift galaxies
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title	Early Results from GLASS-JWST. XVI. Discovering a Bluer z ∼ 4–7 Universe through UV Slopes
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title_sort	early results from glass-jwst. xvi. discovering a bluer z ∼ 4–7 universe through uv slopes
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title_auth	Early Results from GLASS-JWST. XVI. Discovering a Bluer z ∼ 4–7 Universe through UV Slopes
abstract	We use the GLASS-JWST Early Release Science NIRCam parallel observations to provide a first view of the UV continuum properties of NIRCam/F444W selected galaxies at 4 < z < 7. By combining multiwavelength NIRCam observations, we constrain the UV continuum slope for a sample of 401 galaxies with stringent quality controls. We find that <99% of the galaxies are blue star-forming galaxies with very low levels of dust ( Av _β ∼ 0.01 ± 0.33). We find no statistically significant correlation for UV slope with redshift or UV magnitude. However, we find that in general galaxies at higher redshifts and fainter UV magnitudes have steeper UV slopes. We find a statistically significant correlation for UV slope with stellar mass, with galaxies with higher stellar mass showing shallower UV slopes. Individual fits to some of our galaxies reach the bluest UV slopes of β ∼ −3.1 allowed by stellar population models used in this analysis. Therefore, it is likely that stellar population models with a higher amount of Lyman continuum leakage, active galactic nucleus effects, and/or Population III contributions are required to accurately reproduce the rest-UV and optical properties of some of our bluest galaxies. This dust-free early view confirms that our current cosmological understanding of gradual mass + dust buildup of galaxies with cosmic time is largely accurate to describe the ∼0.7–1.5 Gyr age window of the universe. The abundance of a large population of UV faint dust-poor systems may point to a dominance of low-mass galaxies at z < 6 playing a vital role in cosmic reionization.
abstractGer	We use the GLASS-JWST Early Release Science NIRCam parallel observations to provide a first view of the UV continuum properties of NIRCam/F444W selected galaxies at 4 < z < 7. By combining multiwavelength NIRCam observations, we constrain the UV continuum slope for a sample of 401 galaxies with stringent quality controls. We find that <99% of the galaxies are blue star-forming galaxies with very low levels of dust ( Av _β ∼ 0.01 ± 0.33). We find no statistically significant correlation for UV slope with redshift or UV magnitude. However, we find that in general galaxies at higher redshifts and fainter UV magnitudes have steeper UV slopes. We find a statistically significant correlation for UV slope with stellar mass, with galaxies with higher stellar mass showing shallower UV slopes. Individual fits to some of our galaxies reach the bluest UV slopes of β ∼ −3.1 allowed by stellar population models used in this analysis. Therefore, it is likely that stellar population models with a higher amount of Lyman continuum leakage, active galactic nucleus effects, and/or Population III contributions are required to accurately reproduce the rest-UV and optical properties of some of our bluest galaxies. This dust-free early view confirms that our current cosmological understanding of gradual mass + dust buildup of galaxies with cosmic time is largely accurate to describe the ∼0.7–1.5 Gyr age window of the universe. The abundance of a large population of UV faint dust-poor systems may point to a dominance of low-mass galaxies at z < 6 playing a vital role in cosmic reionization.
abstract_unstemmed	We use the GLASS-JWST Early Release Science NIRCam parallel observations to provide a first view of the UV continuum properties of NIRCam/F444W selected galaxies at 4 < z < 7. By combining multiwavelength NIRCam observations, we constrain the UV continuum slope for a sample of 401 galaxies with stringent quality controls. We find that <99% of the galaxies are blue star-forming galaxies with very low levels of dust ( Av _β ∼ 0.01 ± 0.33). We find no statistically significant correlation for UV slope with redshift or UV magnitude. However, we find that in general galaxies at higher redshifts and fainter UV magnitudes have steeper UV slopes. We find a statistically significant correlation for UV slope with stellar mass, with galaxies with higher stellar mass showing shallower UV slopes. Individual fits to some of our galaxies reach the bluest UV slopes of β ∼ −3.1 allowed by stellar population models used in this analysis. Therefore, it is likely that stellar population models with a higher amount of Lyman continuum leakage, active galactic nucleus effects, and/or Population III contributions are required to accurately reproduce the rest-UV and optical properties of some of our bluest galaxies. This dust-free early view confirms that our current cosmological understanding of gradual mass + dust buildup of galaxies with cosmic time is largely accurate to describe the ∼0.7–1.5 Gyr age window of the universe. The abundance of a large population of UV faint dust-poor systems may point to a dominance of low-mass galaxies at z < 6 playing a vital role in cosmic reionization.
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title_short	Early Results from GLASS-JWST. XVI. Discovering a Bluer z ∼ 4–7 Universe through UV Slopes
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