2023ApJ...954L..46L

Query : 2023ApJ...954L..46L

2023ApJ...954L..46L - Astrophys. J., 954, L46 (2023/September-2)

NGDEEP Epoch 1: The Faint End of the Luminosity Function at z ∼ 9-12 from Ultradeep JWST Imaging.

LEUNG G.C.K., BAGLEY M.B., FINKELSTEIN S.L., FERGUSON H.C., KOEKEMOER A.M., PEREZ-GONZALEZ P.G., MORALES A., KOCEVSKI D.D., YANG G., SOMERVILLE R.S., WILKINS S.M., YUNG L.Y.A., FUJIMOTO S., LARSON R.L., PAPOVICH C., PIRZKAL N., BERG D.A., LOTZ J.M., CASTELLANO M., CHAVEZ ORTIZ O.A., CHENG Y., DICKINSON M., GIAVALISCO M., HATHI N.P., HUTCHISON T.A., JUNG I., KARTALTEPE J.S., NATARAJAN P. and ROTHBERG B.

Abstract (from CDS):

We present a robust sample of very high redshift galaxy candidates from the first epoch of JWST/NIRCam imaging from the Next Generation Deep Extragalactic Exploratory Public (NGDEEP) survey. The NGDEEP NIRCam imaging, spanning 9.7 arcmin2 in the Hubble Ultra Deep Field Parallel Field 2, reaches m = 30.4 (5σ, point-source, 2″ diameter apertures corrected to total) in F277W, making it the deepest public JWST GO imaging data set to date. We describe our detailed data reduction process of the six-filter broadband JWST/NIRCam imaging, incorporating custom corrections for systematic effects to produce high-quality calibrated images. Using robust photometric redshift selection criteria, we identify a sample of 38 z ≳ 9 galaxy candidates. These objects span a redshift range of z = 8.5-15.8 and apparent magnitudes of mF277W = 27-30.5 AB mag, reaching ∼1.5 mag deeper than previous public JWST imaging surveys. We calculate the rest-frame ultraviolet luminosity function at z ∼ 9 and 11 and present a new measurement of the luminosity function faint-end slope at z ∼ 11. We find a faint-end slope of α = -2.5 ± 0.4 and -2.2 ± 0.2 at z ∼ 9 and 11, respectively. This is consistent with no significant evolution in the faint-end slope and number density from z = 9 to 11. Comparing our results with theoretical predictions, we find that some models produce better agreement at the faint end than the bright end. These results will help to constrain how stellar feedback impacts star formation at these early epochs.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

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

Nomenclature: Figs 3+7-10, Table 4: [LBF2023] NGDEEP NNNNN N=38+31 among (Nos 250-17674)

Simbad objects: 41

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Number of rows : 41
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 GOODS Southern Field reg 03 32 28.0 -27 48 30           ~ 1623 1
2 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1900 0
3 [LBF2023] NGDEEP 17674 G 03 32 56.044 -27 49 00.04           ~ 2 0
4 [LBF2023] NGDEEP 8165 G 03 32 56.258 -27 49 59.42           ~ 2 0
5 [LBF2023] NGDEEP 8024 G? 03 32 56.448 -27 49 56.09           ~ 1 0
6 [LBF2023] NGDEEP 8427 G 03 32 56.550 -27 50 03.42           ~ 2 0
7 [LBF2023] NGDEEP 8461 G 03 32 56.591 -27 50 04.20           ~ 2 0
8 [LBF2023] NGDEEP 7530 G 03 32 56.884 -27 49 47.61           ~ 2 0
9 [LBF2023] NGDEEP 8042 G 03 32 57.100 -27 49 56.39           ~ 2 0
10 [LBF2023] NGDEEP 6952 G 03 32 57.433 -27 49 37.80           ~ 2 0
11 [LBF2023] NGDEEP 2067 G 03 32 57.551 -27 48 00.88           ~ 2 0
12 [LBF2023] NGDEEP 13406 G 03 32 57.749 -27 51 43.64           ~ 2 0
13 [LBF2023] NGDEEP 8894 G 03 32 57.842 -27 49 43.76           ~ 2 0
14 [AAC2023] NGD-z11b G 03 32 58.09 -27 51 18.3           ~ 3 0
15 [LBF2023] NGDEEP 7722 G 03 32 58.219 -27 49 50.29           ~ 2 0
16 [LBF2023] NGDEEP 13782 G 03 32 58.701 -27 51 48.91           ~ 2 0
17 [LBF2023] NGDEEP 4134 G 03 32 58.931 -27 48 51.74           ~ 2 0
18 [LBF2023] NGDEEP 4674 G 03 32 58.944 -27 49 03.32           ~ 2 0
19 [LBF2023] NGDEEP 2470 G 03 32 59.651 -27 48 09.87           ~ 2 0
20 [LBF2023] NGDEEP 2497 G 03 32 59.706 -27 48 11.12           ~ 2 0
21 [AAC2023] NGD-z8c G 03 32 59.73 -27 49 25.3           ~ 3 0
22 [LBF2023] NGDEEP 5947 G 03 32 59.749 -27 49 22.76           ~ 2 0
23 [LBF2023] NGDEEP 17672 G 03 32 59.774 -27 48 56.07           ~ 2 0
24 [AAC2023] NGD-z15a G 03 32 59.87 -27 52 32.6           ~ 5 0
25 [LBF2023] NGDEEP 250 G 03 32 59.868 -27 52 59.93           ~ 2 0
26 [LBF2023] NGDEEP 6477 G 03 33 00.113 -27 49 30.36           ~ 2 0
27 [LBF2023] NGDEEP 1716 G 03 33 00.254 -27 47 49.17           ~ 2 0
28 [LBF2023] NGDEEP 6980 G 03 33 01.639 -27 49 38.08           ~ 2 0
29 [LBF2023] NGDEEP 3514 G 03 33 01.650 -27 48 28.65           ~ 2 0
30 [LBF2023] NGDEEP 4740 G 03 33 01.794 -27 49 04.18           ~ 2 0
31 [LBF2023] NGDEEP 13290 G 03 33 02.020 -27 51 41.94           ~ 2 0
32 [LBF2023] NGDEEP 9555 G 03 33 02.084 -27 50 50.37           ~ 2 0
33 [AAC2023] NGD-z9b G 03 33 02.64 -27 49 11.6           ~ 3 0
34 [LBF2023] NGDEEP 4919 G 03 33 02.913 -27 49 07.59           ~ 2 0
35 [LBF2023] NGDEEP 4330 G 03 33 03.560 -27 48 57.69           ~ 2 0
36 [AAC2023] NGD-z12a G 03 33 03.97 -27 52 35.7           ~ 3 0
37 [AAC2023] NGD-z9d G 03 33 04.24 -27 52 09.4           ~ 4 0
38 [LBF2023] NGDEEP 9261 G 03 33 05.016 -27 50 28.33           ~ 2 0
39 [AAC2023] NGD-z10c G 03 33 06.45 -27 51 02.2           ~ 3 0
40 [LBF2023] NGDEEP 12453 G 03 33 07.200 -27 51 29.75           ~ 2 0
41 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1967 1

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