J/ApJ/962/195 CEERS Key Paper. VIII. NIRSpec & NIRCam sp. (Backhaus+, 2024)
CEERS Key Paper.
VIII. Emission-line ratios from NIRSpec and NIRCam Wide-Field Slitless
Spectroscopy at z>2.
Backhaus B.E., Trump J.R., Pirzkal N., Barro G., Finkelstein S.L.,
Arrabal Haro P., Simons R.C., Wessner J., Cleri N.J., Bagley M.B.,
Hirschmann M., Nicholls D.C., Dickinson M., Kartaltepe J.S., Papovich C.,
Kocevski D.D., Koekemoer A.M., Bisigello L., Jaskot A.E., Lucas R.A.,
Jung I., Wilkins S.M., Yung L.Y.A., Ferguson H.C., Fontana A., Grazian A.,
Grogin N.A., Kewley L.J., Kirkpatrick A., Lotz J.M., Pentericci L.,
Perez-Gonzalez P.G., Ravindranath S., Somerville R.S., Yang G.,
Holwerda B.W., Kurczynski P., Hathi N.P., Rose C., Davis K.
<Astrophys. J., 962, 195 (2024)>
=2024ApJ...962..195B 2024ApJ...962..195B
ADC_Keywords: Galaxies, spectra; Spectra, infrared; Active gal. nuclei;
Redshifts
Keywords: Emission line galaxies ; Galaxy evolution ; Galaxies ; Active galaxies
Abstract:
We use James Webb Space Telescope Near-Infrared Camera Wide Field
Slitless Spectroscopy (NIRCam WFSS) and the Near-Infrared spectrograph
(NIRSpec) in the Cosmic Evolution Early Release survey to measure
rest-frame optical emission-line ratios of 155 galaxies at z>2. The
blind NIRCam grism observations include a sample of galaxies with
bright emission lines that were not observed on the NIRSpec masks. We
study the changes of the Hα, [OIII]/Hβ, and [NeIII]/[OII]
emission lines in terms of redshift by comparing to lower-redshift
SDSS, CLEAR, and MOSDEF samples. We find a significant (>3σ)
correlation between [OIII]/Hβ with redshift, while [NeIII]/[OII]
has a marginal (2σ) correlation with redshift. We compare
[OIII]/Hβ and [NeIII]/[OII] to stellar mass and Hβ SFR. We
find that both emission-line ratios have a correlation with Hβ
SFR and an anticorrelation with stellar mass across the redshifts
0<z<9. Comparison with MAPPINGS V models indicates that these trends
are consistent with lower metallicity and higher ionization in
low-mass and high-SFR galaxies. We additionally compare to
IllustrisTNG predictions and find that they effectively describe the
highest [OIII]/Hβ ratios observed in our sample, without the need
to invoke MAPPINGS models with significant shock ionization
components.
Description:
Our parent galaxy sample comes from JWST observations taken by the
Cosmic Evolution Early Release Science (CEERS) program, ERS-1345
(PI: Steven Finkelstein). CEERS uses NIRCam Wide Field Slitless
Spectroscopy (WFSS) and NIRSpec multi-object spectroscopy to cover
∼100arcmin2 of the Extended Groth Strip Hubble Space Telescope (HST)
legacy field (EGS; Davis+ 2007ApJ...660L...1D 2007ApJ...660L...1D), which is covered by
the CANDELS HST survey (Grogin+ 2011ApJS..197...35G 2011ApJS..197...35G;
Koekemoer+ 2011ApJS..197...36K 2011ApJS..197...36K). Our paper focuses on the four
pointings with NIRCam WFSS and six pointings with NIRSpec.
The four NIRCam WFSS pointings use the F356W filter to cover
3.14-3.98um. The WFSS spectra have spectroscopic resolving power
R∼1600 at ∼4um.
The six NIRSpec spectroscopy pointings use the G140M/F100LP,
G235M/F170LP, and G395M/F290LP filters, spanning 1-5um. Four of these
pointings were observed in medium resolution, R∼1000, and in prism R∼100.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 98 19 [OIII]/Hβ NIRCam sample
table2.dat 78 18 Hα SFR NIRCam sample
table3.dat 114 118 NIRSpec sample
--------------------------------------------------------------------------------
See also:
J/A+AS/125/149 : CHIANTI - Atomic Database For Emission Lines I. (Dere+ 1997)
J/ApJ/795/165 : Line ratios in z∼2-3 gal. from KBSS-MOSFIRE (Steidel+, 2014)
J/ApJS/225/27 : 3D-HST Survey: grism spectra master catalog (Momcheva+, 2016)
J/ApJ/946/L16 : CEERS Key Paper. IV. JWST & HST data (Perez-Gonzalez+, 2023)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- ID Identifier (fieldpanelWFSS ID number)
13- 22 F10.6 deg RAdeg [214.8/215.13] Right ascension (J2000)
24- 32 F9.6 deg DEdeg [52.8/53] Declination (J2000)
34- 38 F5.3 --- z [5.5/6.8] Redshift
40- 44 F5.2 10-18mW/m2 FOIIIcol [3.47/49.37] The [OIII] WFSS column flux,
10-18erg/s/cm2
46- 50 F5.2 10-18mW/m2 e_FOIIIcol [1.29/12.26] FOIIIcol uncertainty
52- 56 F5.2 10-18mW/m2 FOIIIrow [4.14/49.8] The [OIII] WFSS row flux,
10-18erg/s/cm2
58- 61 F4.2 10-18mW/m2 e_FOIIIrow [2.03/5.92] FOIIIrow uncertainty
63- 67 F5.2 10-18mW/m2 FHbcol [0.01/10.57] The Hbeta WFSS column flux,
10-18erg/s/cm2
69- 73 F5.2 10-18mW/m2 e_FHbcol [1.19/13.39] FHbcol uncertainty
75- 78 F4.2 10-18mW/m2 FHbrow [0.27/7.92] The Hbeta WFSS row flux,
10-18erg/s/cm2
80- 83 F4.2 10-18mW/m2 e_FHbrow [1.5/6.41] FHbrow uncertainty
85- 89 F5.2 [Msun] logMs [8.87/10.19] Log of stellar mass
91- 94 F4.2 [Msun/yr] logSFR [0.14/2.16] Log of stellar formation rate
96- 98 F3.1 mag Av [0/0.8] Dust attenuation
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- ID Identifier (fieldpanelWFSS ID number)
13- 22 F10.6 deg RAdeg [214.89/215.2] Right ascension (J2000)
24- 32 F9.6 deg DEdeg [52.8/53] Declination (J2000)
34- 38 F5.3 --- z [3.9/4.9] Redshift
40- 44 F5.2 10-18mW/m2 FHacol [6.7/65.93] The Halpha WFSS column flux,
10-18erg/s/cm2
46- 50 F5.2 10-18mW/m2 e_FHacol [0.8/16.13] FHacol uncertainty
52- 56 F5.2 10-18mW/m2 FHarow [3.3/89.81] The Halpha WFSS row flux,
10-18erg/s/cm2
58- 62 F5.2 10-18mW/m2 e_FHarow [0.1/10.11] FHarow uncertainty
64- 68 F5.2 [Msun] logMs [7/10.32] Log of stellar mass
70- 74 F5.2 [Msun/yr] logSFR [-9.9/1.4] Log of stellar formation rate
76- 78 F3.1 mag Av [0/3] Dust attenuation
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.6 deg RAdeg [214.8/215.2] Right Ascension (J2000)
12- 20 F9.6 deg DEdeg [52.8/53.1] Declination (J2000)
22- 26 F5.3 --- z [1/8.72] Redshift
28- 34 F7.2 10-18mW/m2 FOIII [0.7/6451]?=-99 The [OIII]5007Å flux,
10-18erg/s/cm2 (1)
36- 42 F7.2 10-18mW/m2 e_FOIII [0/1473]?=-99 Uncertainty in FOIII (1)
44- 49 F6.2 10-18mW/m2 FHb [0.09/108]?=-99 The Hβ flux,
10-18erg/s/cm2 (1)
51- 56 F6.2 10-18mW/m2 e_FHb [0.06/513]?=-99 Uncertainty in FHb (1)
58- 63 F6.2 10-18mW/m2 FHa [0.01/30.26]?=-99 The Hα flux,
10-18erg/s/cm2 (1)
64- 69 F6.2 10-18mW/m2 e_FHa [0/13.3]?=-99 Uncertainty in FHa (1)
71- 76 F6.2 10-18mW/m2 FNeIII [0.02/6.3]?=-99 The [NeIII]3868Å flux,
10-18erg/s/cm2 (1)
78- 83 F6.2 10-18mW/m2 e_FNeIII [0/230]?=-99 Uncertainty in FNeIII (1)
85- 90 F6.2 10-18mW/m2 FOII [0.01/18.3]?=-99 The [OII]3726Å flux,
10-18erg/s/cm2 (1)
92- 98 F7.2 10-18mW/m2 e_FOII [0/4582]?=-99 Uncertainty in FOII (1)
100- 104 F5.2 [Msun] logMs [6.9/10.6] Log of stellar mass
106- 110 F5.2 [Msun/yr] logSFR [-2.4/2.3] Log of star formation rate
112- 114 F3.1 mag Av [0/4] Dust attenuation
--------------------------------------------------------------------------------
Note (1): NULL values indicate the line is off the spectra or in a gap.
--------------------------------------------------------------------------------
Nomenclature Notes:
NIRCam sources are <[BTP2024] NNN-A-NNNNN> in Simbad.
NIRSpec sources are <[BTP2024] JDDD.dddddd+DD.dddddd> in Simbad.
History:
From electronic version of the journal
License: CC-BY-4.0
References:
Finkelstein et al. Paper I. 2023ApJ...946L..13F 2023ApJ...946L..13F
Kocevski et al. Paper II. 2023ApJ...946L..14K 2023ApJ...946L..14K
Kartaltepe et al. Paper III. 2023ApJ...946L..15K 2023ApJ...946L..15K
Perez-Gonzalez et al. Paper IV. 2023ApJ...946L..16P 2023ApJ...946L..16P Cat. J/ApJ/946/L16
Papovich et al. Paper V. 2023ApJ...949L..18P 2023ApJ...949L..18P
Yang et al. Paper VI. 2023ApJ...950L...5Y 2023ApJ...950L...5Y
Kirkpatrick et al. Paper VII. 2023ApJ...959L...7K 2023ApJ...959L...7K
Backhaus et al. Paper VIII. 2024ApJ...962..195B 2024ApJ...962..195B This catalog
Rose et al. Paper IX. 2024ApJ...976L...8R 2024ApJ...976L...8R
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 19-May-2026