J/ApJ/943/37 HST grism data of CLEAR galaxies in GOODS (Backhaus+, 2023)
CLEAR: spatially resolved emission lines and active galactic nuclei at
0.6<z<1.3.
Backhaus B.E., Bridge J.S., Trump J.R., Cleri N.J., Papovich C.,
Simons R.C., Momcheva I., Holwerda B.W., Ji Z., Jung I., Matharu J.
<Astrophys. J., 943, 37 (2023)>
=2023ApJ...943...37B 2023ApJ...943...37B
ADC_Keywords: Galaxies, spectra; Optical; Spectra, infrared; Active gal. nuclei
Keywords: Galaxies ; Active galaxies ; Emission line galaxies
Abstract:
We investigate spatially resolved emission-line ratios in a sample of
219 galaxies (0.6<z<1.3) detected using the G102 grism on the Hubble
Space Telescope Wide Field Camera 3 taken as part of the CANDELS
Lyα Emission at Reionization survey to measure ionization
profiles and search for low-luminosity active galactic nuclei (AGN).
We analyze [OIII] and Hβ emission-line maps, enabling us to
spatially resolve the [OIII]/Hβ emission-line ratio across the
galaxies in the sample. We compare the [OIII]/Hβ ratio in galaxy
centers and outer annular regions to measure ionization differences
and investigate the potential of sources with nuclear ionization to
host AGN. We investigate some of the individual galaxies that are
candidates to host strong nuclear ionization and find that they often
have low stellar mass and are undetected in X-rays, as expected for
low-luminosity AGN in low-mass galaxies. We do not find evidence for a
significant population of off-nuclear AGN or other clumps of
off-nuclear ionization. We model the observed distribution of
[OIII]/Hβ spatial profiles and find that most galaxies are
consistent with a small or zero difference between their nuclear and
off-nuclear line ratios, but 6%-16% of galaxies in the sample are
likely to host nuclear [OIII]/Hβ that is ∼0.5dex higher than in
their outer regions. This study is limited by large uncertainties in
most of the measured [OIII]/Hβ spatial profiles; therefore,
deeper data, e.g., from deeper HST/WFC3 programs or from JWST/NIRISS,
are needed to more reliably measure the spatially resolved
emission-line conditions of individual high-redshift galaxies.
Description:
The data used in this work are comprised of HST/WFC3 G102 grism
(0.8um<λ<1.15um) observations from various surveys, the
majority of which were taken as part of the CANDELS Lyα Emission
at Reionization (CLEAR, Estrada-Carpenter+ 2019ApJ...870..133E 2019ApJ...870..133E) G102
grism survey. The G102 observations come from programs GO-14227
(PI: C. Papovich), GO-13420 (PI: G. Barro), and GO/DD-11359 (ERS;
PI: R. O'Connell). The HST/WFC3 also has G141 observations that come
from programs GO-11600 (AGHAST; PI: B. Weiner), GO-12461 (SN Colfax;
PI: A. Reiss), GO-13871 (PI: P. Oesch), GO/DD-11359 (ERS;
PI: R. O'Connell), GO-12099 (George, Primo; PI: A. Reiss), and
GO-12177 (3D-HST; PI: van Dokkum).
The CLEAR survey is augmented by G102 observations from the Faint
Infrared Grism Survey (FIGS, Pirzkal+ 2017ApJ...846...84P 2017ApJ...846...84P;
HST-GO 13776; PI: Malhotra).
The HST data used in this paper can be found in MAST:
10.17909/t9-ctff-wx60
CLEAR F105W reference images and the dispersed G102 grism were aligned
to the same world coordinate system as the 3D-HST photometric catalog
(Skelton+ 2014, J/ApJS/214/24).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 69 219 Sample with the integrated inner- and outer-aperture
ratio measurements along with the stellar mass,
redshift, SFR, and effective radius of the galaxies
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See also:
J/ApJ/720/368 : Color-magnitude relations of galaxies in CDFs (Xue+, 2010)
J/ApJ/763/133 : Broad-line AGN with host galaxy colors (Trump+, 2013)
J/ApJS/214/24 : 3D-HST+CANDELS catalog (Skelton+, 2014)
J/ApJ/795/165 : Line ratios in z∼2-3 gal. from KBSS-MOSFIRE (Steidel+, 2014)
J/ApJ/802/89 : Luminosity function of X-ray-selected AGNs (Buchner+, 2015)
J/ApJS/225/27 : 3D-HST Survey: grism spectra master cat. (Momcheva+, 2016)
J/ApJ/827/74 : [NII]/Hα ratio in gal. with KMOS3D (Wuyts+, 2016)
J/ApJS/224/15 : Improved 2Ms and 250ks Chandra catalogs (Xue+, 2016)
J/ApJS/228/2 : Chandra Deep Field-South survey: 7Ms sources (Luo+, 2017)
J/ApJS/243/22 : CANDELS/SHARDS multiwavelength cat. in GOODS-N (Barro+, 2019)
J/ApJ/898/171 : CLEAR. II. SFRs of quiescent gal. (Estrada-Carpenter+, 2020)
J/ApJ/923/203 : CLEAR: HST grism obs. of CANDELS galaxies (Simons+, 2021)
J/MNRAS/501/1028 : Galaxies at z=1-3 lensed by six HFF clusters (Yang+, 2021)
J/ApJ/933/87 : F125W and UV mag of 6.0<z<8.2 galaxies cand. (Jung+, 2022)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Field Object Field ("GOODS-S" or "GOODS-N")
10- 14 I5 --- ID [10512/49902] Object CLEAR ID
16- 20 F5.2 [-] Int-Ratio [0.45/12.21] Integrated log([OIII]/Hb)
line ratio
22- 25 F4.2 [-] e_Int-Ratio [0.04/4.1] Uncertainty in Int-Ratio
27- 31 F5.2 [-] In-Ratio [0.3/10.54] Inner log([OIII]/Hb) line ratio
33- 37 F5.2 [-] e_In-Ratio [0.1/11] Uncertainty in In-Ratio
39- 42 F4.2 [-] Out-Ratio [0.28/8.23] Outer log([OIII]/Hb) line ratio
44- 47 F4.2 [-] e_Out-Ratio [0.2/9] Uncertainty in Out-Ratio
49- 53 F5.2 [Msun] Mass [8.3/11] Log stellar mass
55- 58 F4.2 --- z [0.7/1.3] Redshift
60- 64 F5.2 [Msun/yr] SFR [-0.2/2.8] Log Star Formation Rate from
Hb luminosity
66- 69 F4.2 kpc R50 [0.02/1] Effective radius
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 19-Nov-2024