2024ApJ...971..161M

Query : 2024ApJ...971..161M

2024ApJ...971..161M - Astrophys. J., 971, 161 (2024/August-3)

SERENADE. II. An ALMA Multiband Dust Continuum Analysis of 28 Galaxies at 5 < z < 8 and the Physical Origin of the Dust Temperature Evolution.

MITSUHASHI I., HARIKANE Y., BAUER F.E., BAKX T.J.L.C., FERRARA A., FUJIMOTO S., HASHIMOTO T., INOUE A.K., IWASAWA K., NISHIMURA Y., IMANISHI M., ONO Y., SAITO T., SUGAHARA Y., UMEHATA H., VALLINI L., WANG T. and ZAVALA J.A.

Abstract (from CDS):

We present an analysis of the Atacama Large Millimeter-submillimeter Array (ALMA) multiband dust continuum observations for 28 spectroscopically confirmed bright Lyman break galaxies at 5 < z < 8. Our sample consists of 11 galaxies at z ∼ 6 newly observed in our ALMA program, which substantially increases the number of 5 < z < 8 galaxies with both rest-frame 88 and 158 μm continuum observations, allowing us to simultaneously measure the IR luminosity and dust temperature for a statistical sample of z ≳ 5 galaxies for the first time. We derive the relationship between the ultraviolet (UV) slope (βUV) and infrared excess (IRX) for the z ∼ 6 galaxies, and find a shallower IRX-βUV relation compared to the previous results at z ∼ 2-4. Based on the IRX-βUV relation consistent with our results and the βUV-MUV relation including fainter galaxies in the literature, we find a limited contribution of the dust-obscured star formation to the total star formation rate density, ∼30% at z ∼ 6. Our measurements of the dust temperature at z ∼ 6-7, ${T}_{\mathrm{dust}}={40.9}_{-9.1}^{+10.0}\,{\rm{K}}$ on average, support a gentle increase of Tdust from z = 0 to z ∼ 6-7. Using an analytic model with parameters consistent with recent James Webb Space Telescope results, we discuss that the observed redshift evolution of the dust temperature can be reproduced by an ∼0.6 dex decrease in the gas depletion timescale and ∼0.4 dex decrease in the metallicity. The variety of Tdust observed at high redshifts can also be naturally explained by scatters around the star formation main sequence and average mass-metallicity relation including an extremely high dust temperature of Tdust > 80 K observed in a galaxy at z = 8.3.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Galaxy evolution - Galaxy formation - High-redshift galaxies

Simbad objects: 39

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Number of rows : 39
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 HSCS J020038-021052 G 02 00 38.0 -02 10 52           ~ 1 0
3 HSCS J021033-052304 G 02 10 33.82 -05 23 04.1           ~ 7 0
4 HSCS J021041-055917 G 02 10 41.28 -05 59 17.9           ~ 6 0
5 HSCS J021244-015824 G 02 12 44.75 -01 58 24.6           ~ 4 0
6 [MOK2016b] HSC J021721.59-020852.6 QSO 02 17 21.59 -02 08 52.6           ~ 37 0
7 CANDELS UDS F160W J021735.33-051032.4 EmG 02 17 35.337 -05 10 32.50           ~ 14 0
8 NAME SXDSF reg 02 18 00 -05 00.0           ~ 237 1
9 HSCS J021807-045841 EmG 02 18 07.140 -04 58 41.48           ~ 4 0
10 HSCS J021838-050943 EmG 02 18 38.900 -05 09 43.94           ~ 5 0
11 HSCS J022023-050431 G 02 20 23.0 -05 04 31           ~ 1 0
12 REBELS-12 G 02 25 07.94 -05 06 40.7           ~ 21 0
13 [PNL2019] 191313 G 02 26 27.03 -04 52 38.3           ~ 33 0
14 HSCS J023536-031737 G 02 35 36.580 -03 17 37.67           ~ 3 0
15 [MOK2016b] HSC J023542.42-053241.6 QSO 02 35 42.42 -05 32 41.6           ~ 25 0
16 CLASH Abell383 2211 LeG 02 48 01.3929 -03 32 58.408         26.4 ~ 2 0
17 [HBL2016] MACS 0454-1251 G 04 54 08.557 -03 00 14.82           ~ 6 0
18 HSCS J085723+014254 G 08 57 23.95 +01 42 54.6           ~ 6 0
19 [MOK2016b] HSC J091436.47+044231.7 G 09 14 36.47 +04 42 31.7           ~ 3 0
20 COSMOS2015 494057 EmG 09 58 28.52 +02 03 06.8 27.59 28.369 27.394 26.16 24.65 ~ 67 0
21 COSMOS2015 776817 G 09 58 46.200 +02 28 45.76           ~ 13 0
22 COSMOS2015 711112 G 09 59 51.697 +02 22 42.16           ~ 35 0
23 COSMOS2015 586681 EmG 10 00 08.770 +02 11 36.40     27.45 27.34 26.33 ~ 11 0
24 COSMOS2015 848185 EmG 10 00 21.504 +02 35 11.08   27.450 26.872     ~ 68 0
25 REBELS-P6 G 10 00 29.870 +02 13 02.47           ~ 33 0
26 REBELS-P7 G 10 00 29.89 +01 46 46.4           ~ 10 0
27 CANDELS COSMOS F160W J100030.18+021559.7 G 10 00 30.19 +02 15 59.8           ~ 53 0
28 REBELS-25 G 10 00 32.322 +01 44 31.26           ~ 39 0
29 COSMOS2015 877552 G 10 00 43.38 +02 37 51.8           ~ 19 0
30 COSMOS2015 180331 EmG 10 00 59.300 +01 33 19.60           ~ 59 0
31 COSMOS2015 408255 G 10 01 40.70 +01 54 52.5           ~ 71 0
32 COSMOS2015 923550 G 10 02 54.040 +02 42 11.94           ~ 18 0
33 HSCS J100633+030005 G 10 06 33.53 +03 00 05.2           ~ 4 0
34 HSCS J114412-000613 G 11 44 12.0 -00 06 13           ~ 1 0
35 HSCS J121137-011816 G 12 11 37.10 -01 18 16.4           ~ 31 0
36 ALMA J131129.9-011918 G 13 11 29.93 -01 19 18.7           ~ 91 0
37 [MOK2016b] HSC J135348.55-001026.5 G 13 53 48.55 -00 10 26.5           ~ 3 0
38 [MOK2016b] HSC J142824.71+015934.4 G 14 28 24.71 +01 59 34.4           ~ 3 0
39 NAME HFLS 3 G 17 06 47.8 +58 46 23           ~ 151 0

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