J/ApJ/910/135 RELICS 6≲z≤8 galaxies with Spitzer & HST obs. (Strait+, 2021)
RELICS: Properties of z≥5.5 galaxies inferred from Spitzer and Hubble imaging,
including a candidate z∼6.8 strong [OIII] emitter.
Strait V., Bradac M., Coe D., Lemaux B.C., Carnall A.C., Bradley L.,
Pelliccia D., Sharon K., Zitrin A., Acebron A., Neufeld C.,
Andrade-Santos F., Avila R.J., Frye B.L., Mahler G., Nonino M., Ogaz S.,
Oguri M., Ouchi M., Paterno-Mahler R., Stark D.P., Mainali R., Oesch P.A.,
Trenti M., Carrasco D., Dawson W.A., Jones C., Umetsu K., Vulcani B.
<Astrophys. J., 910, 135 (2021)>
=2021ApJ...910..135S 2021ApJ...910..135S
ADC_Keywords: Galaxies, photometry; Photometry, HST; Optical; Infrared;
Redshifts; Surveys; Gravitational lensing; Magnitudes, absolute;
Clusters, galaxy
Keywords: High-redshift galaxies ; Galaxies
Abstract:
We present constraints on the physical properties (including stellar
mass, age, and star formation rate) of 207 6≤z≤8 galaxy candidates
from the Reionization Lensing Cluster Survey (RELICS) and
Spitzer-RELICS surveys. We measure photometry using T-PHOT and perform
spectral energy distribution fitting using EAzY and BAGPIPES. Of the
207 candidates for which we could successfully measure (or place
limits on) Spitzer fluxes, 23 were demoted to likely z<4. Among the
high-z candidates, we find intrinsic stellar masses between
1x106M☉ and 4x109M☉, and rest-frame UV absolute
magnitudes between -22.6 and -14.5mag. While our sample is mostly
comprised of LmUV/LmUV*<1 galaxies, it extends to
LmUV/LmUV*∼2. Our sample spans ∼4 orders of magnitude in stellar
mass and star formation rates, and exhibits ages that range from
maximally young to maximally old. We highlight 11 z≥6.5 galaxies with
detections in Spitzer/IRAC imaging, several of which show evidence for
some combination of evolved stellar populations, large contributions
of nebular emission lines, and/or dust. Among these is
PLCKG287+32-2013, one of the brightest z∼7 candidates known (AB mag
24.9 at 1.6µm) with a Spitzer 3.6µm flux excess suggesting
strong [OIII]+H-β emission (∼1000Å rest-frame equivalent
width). We discuss the possible uses and limits of our sample and
present a public catalog of Hubble + Spitzer photometry along with
physical property estimates for all objects in the sample.
Description:
All imaging data used for this analysis were obtained through a
combination of RELICS and archival data. Each cluster was observed
with HST and Spitzer.
Here we briefly summarize the observing strategy of the survey, but
in-depth information about observations can be found on the RELICS
website (http://relics.stsci.edu/) and in the RELICS overview paper
(Coe+ 2019, J/ApJ/884/85).
Each cluster was observed with two orbits of Wide Field Camera 3
(WFC3)/IR imaging split among the F105W, F125W, F140W, and F160W
filters, and three orbits of Advanced Camera for Surveys (ACS) split
among F435W, F606W, and F814W (minus archival optical imaging), for a
total of 188 HST orbits. Several clusters had archival ACS and/or WFC3
imaging in other filters (F390W, F475W, F555W, F625W, F775W, F850LP,
F110W) and some clusters that received additional data from a
subsequent proposal.
Spitzer/IRAC images for all clusters come from S-RELICS
(Spitzer-RELICS, PI Bradac #12005, 13165, 13210, Director's
Discretionary Time, PI Soifer #12123), for a total of over 1000hr of
exposure time, and additional archival data. See Section 2.2.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 87 41 Exposure times and programs of Spitzer data
relics-z.dat 1828 207 RELICS high-z catalog
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See also:
J/ApJ/738/69 : SEDs of galaxies at 3.8<z<5 in GOODS (Shim+, 2011)
J/ApJS/199/25 : CLASH sources for MACS1149.6+2223 (Postman+, 2012)
J/ApJ/762/L30 : CLASH: MCS J0416.1-2403 strong lensing analysis (Zitrin+, 2013)
J/A+A/568/L8 : VUDS extreme emission line 0.2≲z≲0.9 galaxies (Amorin+, 2014)
J/ApJ/801/44 : HST lensing analysis of the CLASH sample (Zitrin+, 2015)
J/A+A/590/A31 : ASTRODEEP Frontier Fields Catalogues (Merlin+, 2016)
J/ApJ/839/L11 : HST strong lensing analysis of PLCKG287.0+32.9 (Zitrin+, 2017)
J/ApJ/884/85 : RELICS: Reionization Lensing Cluster Survey (Coe+, 2019)
J/A+A/643/A4 : ALPINE-ALMA [CII] survey. IR luminosity (Fudamoto+, 2020)
J/ApJ/889/189 : Brightest high-z galaxies in RELICS clusters (Salmon+, 2020)
http://relics.stsci.edu/ : RELICS home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 A12 --- Cl Cluster identifier
14- 15 I2 h RAh Hour of right ascension (J2000) (1)
17- 18 I2 min RAm Minute of right ascension (J2000)
20- 23 F4.1 s RAs Second of right ascension (J2000)
25 A1 --- DE- Sign of declination (J2000) (1)
26- 27 I2 deg DEd Degree of declination (J2000) (1)
29- 30 I2 arcmin DEm Arcminute of declination (J2000)
32- 35 F4.1 arcsec DEs Arcsecond of declination (J2000)
37- 42 A6 h Exp Exposure times for IRAC channels 1 and 2
44- 87 A44 --- Prog Spitzer program IDs (2)
--------------------------------------------------------------------------------
Note (1): R.A.s and declinations correspond to cluster centers.
Note (2): Program IDs included in our reduction.
#12005, 13165, 14281, 13165, 13210, 14017: PI Marusa Bradac.
#12123: PI Tom Soifer,
#60034, 90218 PI Eiichi Egami,
#14253 PI Mauro Stefanon,
#14242 PI Andra Stroe,
#50096 PI Paul Martini,
#70149 PI Felipe Menanteau,
#83 PI George Rieke,
#14130 PI Rychard J Bouwens,
#17 PI Giovanni Fazio,
#20740, 50726, 70063 PI Bradford P Holden,
#80012 PI Mark Brodwin.
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Byte-by-byte Description of file: relics-z.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 A12 --- Cl Cluster identifier
14 A1 --- m_Cl [NS] Component on Cluster ID
16- 19 I4 --- ID [9/6150] ID within cluster from SExtractor
cat. given in Salmon+ 2020, J/ApJ/889/189
21- 40 F20.16 deg RAdeg [4.6/348] Right ascension in decimal
degrees (J2000) (ra)
42- 61 F20.16 deg DEdeg [-81.6/66] Declination in decimal degrees
(J2000) (dec)
63- 73 F11.7 nJy F390W [0.005/0.2]?=-99 HST/WFC3 F390W flux
(f_f390w)
75- 96 F22.18 nJy e_F390W [0.01/0.03]?=-99 F390W uncertainty
98- 119 E22.20 nJy F435W [-0.2/0.2]?=-99 HST/ACS F435W flux (f_f435w)
121- 143 F23.19 nJy e_F435W [0.003/0.09]?=-99 F435W uncertainty
145- 167 F23.19 nJy F555W [-0.009/0.03]?=-99 HST F555W flux (f_f555w)
169- 191 F23.19 nJy e_F555W [0.003/0.02]?=-99 F555W uncertainty
193- 216 F24.20 nJy F606W [-0.08/0.2]?=-99 HST/ACS F606W flux
(f_f606w)
218- 240 F23.19 nJy e_F606W [0.002/0.04]?=-99 F606W uncertainty
242- 264 E23.20 nJy F625W [-0.02/0.02]?=-99 HST F625W flux (f_f625w)
266- 288 F23.19 nJy e_F625W [0.001/0.02]?=-99 F625W uncertainty
290- 312 F23.19 nJy F775W [-0.02/0.07]?=-99 HST F775W flux (f_f775w)
314- 336 F23.19 nJy e_F775W [0.001/0.02]?=-99 F775W uncertainty
338- 361 F24.19 nJy F814W [-0.03/1.1]?=-99 HST/ACS F814W flux
(f_f814w)
363- 385 F23.19 nJy e_F814W [0.002/0.04]?=-99 HST F814W uncertainty
387- 408 F22.18 nJy F850LP [0.008/0.25]?=-99 HST F850LP flux (f_f850lp)
410- 432 F23.19 nJy e_F850LP [0.003/0.03]?=-99 F850LP uncertainty
434- 455 F22.18 nJy F105W [0.003/2.4]?=-99 HST/WFC3 F105W flux
(f_f105w)
457- 478 F22.18 nJy e_F105W [0.006/0.04]?=-99 F105W uncertainty
480- 501 F22.18 nJy F110W [0.01/0.4]?=-99 HST/WFC3 F110W flux
(f_f110w)
503- 525 F23.19 nJy e_F110W [0.002/0.008]?=-99 F110W uncertainty
527- 547 F21.18 nJy F125W [-0.005/2.9] HST/WFC3 F125W flux (f_f125w)
549- 569 F21.19 nJy e_F125W [0.004/0.07] F125W uncertainty
571- 592 F22.18 nJy F140W [0.008/2.9]?=-99 HST/WFC3 F140W flux
(f_f140w)
594- 615 F22.18 nJy e_F140W [0.009/0.06]?=-99 F140W uncertainty
617- 636 F20.18 nJy F160W [0.019/2.9] HST/WFC3 F160W flux (f_f160w)
638- 658 F21.19 nJy e_F160W [0.004/0.04] F160W uncertainty
660- 682 F23.19 nJy irac1 [-0.81/2.4]?=-99 Spitzer/IRAC ch1 (3.6um)
flux (f_irac1)
684- 705 F22.18 nJy e_irac1 [0.04/1]?=-99 irac1 uncertainty
707- 728 E22.19 nJy irac2 [-1.1/2.5] Spitzer/IRAC ch2 (4.5um) flux
(f_irac2)
730- 749 F20.18 nJy e_irac2 [0.03/1.8] irac2 uncertainty
751- 770 F20.18 --- cv1 [0.014/3.9] Covariance index for IRAC ch1
772- 791 F20.18 --- cv2 [0.013/3.3] Covariance index for IRAC ch2
793- 797 F5.2 --- muAvg [1/96.1] Mean of median magnification
(mu_mean-medians)
799- 804 F6.2 --- muMed1 [0.8/107] Median magnification for type 1
lens model (mu_median1)
806- 811 F6.2 --- muMed2 [1/146]?=-99 Median magnification for
type 2 lens model (mu_median2)
813- 818 F6.2 --- muMed3 [2.5/9.1]?=-99 Median magnification for
type 3 lens model (mu_median3)
820- 835 A16 --- Mod1 Type of lens model associated with muMed1
(magmodeltype1) (1)
837- 852 A16 --- Mod2 Type of lens model associated with muMed2
(magmodeltype2) (1)
854- 869 A16 --- Mod3 Type of lens model associated with muMed3
(magmodeltype3) (1)
871- 877 F7.4 [yr] logAgeA [7/10.2] Log best-fit formation age using
Method A (methodAlogage_best)
879- 901 F23.12 [Msun] logMassA [5591/7.6e+9] Log best-fit stellar mass
using method A (methodAlogmass_best)
903- 907 F5.2 --- zpkA [0.01/10.2] Best-fit redshift using
Method A (EAZY default templates,
no model assumptions) (metodA_zpeak)
909- 929 E21.19 Msun/yr SFRA [7.9e-7/53] Best-fit star formation rate
using Method A (methodAsfrbest)
931- 934 F4.2 mag ebmvA [0/1] Best-fit E(B-V) using Method A
(methodAebmvbest)
936- 955 F20.16 mag MAG [-21.75/-4.8] Absolute magnitude, calculated
using Method A redshifts (absmag)
957- 975 F19.16 --- zmedA [0.18/10.3] Median redshift from
posterior using Method A (EAZY default
templates, no model assumptions)
(methodA_zmed)
977- 996 F20.18 --- B_zmedA [0.02/6.5] zmedA upper 68% confidence
limit (methodA_zu68)
998-1017 F20.18 --- b_zmedA [0.02/6.1] zmedA lower 68% confidence
limit (methodA_zl68)
1019-1038 F20.8 Msun MmedA [3.5e+7/2.3e+10] Median stellar mass from
posterior using Method A
(methodAsmassmed)
1040-1059 F20.9 Msun B_MmedA [8.8e+6/6e+9] MmedA upper 68% confidence
limit (methodAsmassu68)
1061-1080 F20.9 Msun b_MmedA [6.7e+6/5.6e+9] MmedA lower 68%
confidence limit (methodAsmassl68)
1082-1101 F20.17 Msun/yr SFRmedA [0.01/83] Median star formation rate from
posterior using Method A (methodAsfrmed)
1103-1123 F21.18 Msun/yr B_SFRmedA [0.016/82] SFRmedA upper 68% confidence
limit (methodAsfru68)
1125-1146 F22.19 Msun/yr b_SFRmedA [0.007/37] SFRmedA lower 68% confidence
limit (methodAsfrl68)
1148-1152 F5.3 mag ebmvmedA [0/1] Median E(B-V) from posterior using
Method A (methodAebmvmed)
1154-1173 F20.18 mag B_ebmvmedA [0/0.61] ebmvmedA upper 68% confidence
limit (methodAebmvu68)
1175-1193 F19.17 mag b_ebmvmedA [0/0.65] ebmvmedA lower 68% confidence
limit (methodAebmvl68)
1195-1215 F21.18 Gyr AgeMedA [0.01/11.3] Median formation age from
posterior using Method A
(methodAageform_med)
1217-1239 E23.19 Gyr B_AgeMedA [-1.2e-16/9.8] AgeMedA upper 68%
confidence limit (methodAageform_u68)
1241-1262 F22.19 Gyr b_AgeMedA [0/10.3] AgeMedA lower 68% confidence
limit (methodAageform_l68)
1264-1281 F18.16 --- zmedB [4.7/10] Median redshift from posterior
using Method B (methodB_zmed)
1283-1300 F18.16 --- b_zmedB [4.7/10] zmedB lower 68% confidence limit
(methodB_zl68)
1302-1319 F18.16 --- B_zmedB [4.7/10] zmedB upper 68% confidence limit
(methodB_zu68)
1321-1341 F21.9 Msun MmedB [3.7e+7/5.7e+10] Median stellar mass from
posterior using Method B
(methodBsmassmed)
1343-1362 F20.8 Msun b_MmedB [3.6e+7/5.7e+10] MmedB lower 68%
confidence limit (methodBsmassl68)
1364-1383 F20.8 Msun B_MmedB [3.8e+7/5.7e+10] MmedB upper 68%
confidence limit (methodBsmassu68)
1385-1406 F22.17 Msun/yr SFRmedB [0.037/3639] Median star formation rate
from posterior using Method B
(methodBsfrmed)
1408-1428 F21.16 Msun/yr b_SFRmedB [-2.4/3615] SFRmedB lower 68% confidence
limit (methodBsfrl68)
1430-1450 F21.16 Msun/yr B_SFRmedB [0.5/3663] SFRmedB upper 68% confidence
limit (methodBsfru68)
1452-1471 F20.18 Gyr AgeMedB [0.002/0.9] Median formation age from
posterior using Method B
(methodBageform_med)
1473-1493 F21.19 Gyr b_AgeMedB [0.002/0.9] AgeMedB lower 68% confidence
limit (methodBageform_l68)
1495-1515 F21.19 Gyr B_AgeMedB [0.002/0.9] AgeMedB upper 68% confidence
limit (methodBageform_u68)
1517-1535 F19.17 Gyr AgeMWB [0.0013/0.5] Median mass-weighted age
from posterior using Method B
(methodBageMW_med)
1537-1557 F21.19 Gyr b_AgeMWB [0.0012/0.5] AgeMWB lower 68% confidence
limit (methodBageMW_l68)
1559-1579 F21.19 Gyr B_AgeMWB [0.0013/0.5] AgeMWB upper 68% confidence
limit (methodBageMW_u68)
1581-1600 F20.18 --- Metal [0.01/5] Median metallicity in z☉
from posterior using Method B
(methodBmetallicitymed)
1602-1623 F22.19 --- b_Metal [-0.005/5] Metal lower 68% confidence
limit (methodBmetallicityl68)
1625-1644 F20.18 --- B_Metal [0.014/5] Metal upper 68% confidence
limit (methodBmetallicityu68)
1646-1664 F19.17 mag Av [0.016/1.3] Median extinction from
posterior using Method B
(methodBdustmed)
1666-1685 F20.18 mag b_Av [0.016/1.3] Av lower 68% confidence limit
(methodBdustl68)
1687-1706 F20.18 mag B_Av [0.016/1.3] Av upper 68% confidence limit
(methodBdustu68)
1708-1726 F19.16 --- logU [-3.43/-1.3] Median ionization parameter
log(U) from posterior using Method B
(methodBionizationmed)
1728-1746 F19.16 --- b_logU [-3.44/-1.3] logU lower 68% confidence
limit (methodBionizationl68)
1748-1766 F19.16 --- B_logU [-3.42/-1.3] logU upper 68% confidence
limit (methodBionizationu68)
1768-1786 F19.15 0.1nm EWOIIIB [2/657] Median rest-frame equivalent
width of OIII+Hb from posterior using
Method B (methodBEWOIII+Hb_med)
1788-1807 F20.16 0.1nm b_EWOIIIB [1.9/646] EWOIIIB lower 68% confidence
limit (methodBEWOIII+Hb_l68)
1809-1828 F20.16 0.1nm B_EWOIIIB [2/669] EWOIIIB upper 68% confidence
limit (methodBEWOIII+Hb_u68)
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Note (1): Type of lens model (see Section 4) as follows:
glafic = e.g. Oguri+ 2010PASJ...62.1017O 2010PASJ...62.1017O
lenstool = see Jullo+ 2009MNRAS.395.1319J 2009MNRAS.395.1319J
zitrin-ltm-gauss = light traces mass (e.g., Zitrin+ 2013, J/ApJ/762/L30)
-99.0 = N/A
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History:
From electronic version for Table 1
Catalog downloaded from:
http://victoriastrait.github.io/relics_catalog_public.html
(End) Emmanuelle Perret [CDS] 16-Sep-2022