J/ApJ/897/41 Lyman Continuum in 111 GOODS and ERS galaxies (Smith+, 2020)
The Lyman Continuum Escape Fraction of Galaxies and AGN in the GOODS Fields.
Smith B.M., Windhorst R.A., Cohen S.H., Koekemoer A.M., Jansen R.A.,
White C., Borthakur S., Hathi N., Jiang L., Rutkowski M., Ryan R.E.,
Inoue A.K., O'Connell R.W., MacKenty J.W., Conselice C.J., Silk J.I.
<Astrophys. J., 897, 41 (2020)>
=2020ApJ...897...41S 2020ApJ...897...41S
ADC_Keywords: Active gal. nuclei; Redshifts; Infrared; Extinction;
Star Forming Region
Keywords: High-redshift galaxies ; Active galactic nuclei ;
Ultraviolet astronomy ; Reionization
Abstract:
We present our analysis of the Lyman continuum (LyC) emission and
escape fraction of 111 spectroscopically verified galaxies with and
without active galactic nuclei (AGN) from 2.26<z<4.3. We extended our
ERS sample from Smith et al. with 64 galaxies in the GOODS North and
South fields using WFC3/UVIS F225W, F275W, and F336W mosaics we
independently drizzled using the HDUV, CANDELS, and UVUDF data. Among
the 17 AGN from the 111 galaxies, one provided a LyC detection in
F275W at mAB=23.19mag (signal-to-noise ratio, S/N∼133) and GALEX NUV
at mAB=23.77mag (S/N∼13). We simultaneously fit SDSS and Chandra
spectra of this AGN to an accretion disk and Comptonization model, and
find fesc values of fescF275W∼28-4+20% and
fescNUV∼30-5+22% . For the remaining 110 galaxies, we stack
image cutouts that capture their LyC emission using the F225W, F275W,
and F336W data of the GOODS and ERS samples, and both combined, as
well as subsamples of galaxies with and without AGN, and all galaxies.
We find the stack of 17 AGN dominate the LyC production from
∼2.3-4.3 by a factor of ∼10 compared to all 94 galaxies without
AGN. While the IGM of the early universe may have been reionized
mostly by massive stars, there is evidence that a significant portion
of the ionizing energy came from AGN.
Description:
We analyzed and quantified the Lyman Continuum (LyC) radiation
escaping from a survey of 111 spectroscopically verified galaxies in
the Great Observatories Origins Deep Survey (GOODS) North, GOODS
South, and the Early Release Science (ERS) fields in three Wide Field
Camera 3 (WFC3/UVIS) filters (F105W, F125W and F160W) where LyC can be
observed at z∼2.26-4.35.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 91 111 List of galaxies and SED parameters
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See also:
II/261 : GOODS initial results (Giavalisco+, 2004)
II/335 : Revised catalog of GALEX UV sources (GUVcat_AIS GR6+7)(Bianchi+ 2017)
VIII/10 : Bell Laboratories H I Profiles (Stark+ 1992)
VIII/28 : Bell Laboratories H I Survey (Stark+ 1992)
J/ApJS/79/77 : Bell Lab. H I Survey - High Velocity Clouds (Stark+ 1992)
J/ApJ/475/469 : Composite HST Spectrum of Quasars (Zheng+ 1997)
J/AJ/120/2747 : HDF-South WFPC2 observations (Casertano+, 2000)
J/AJ/122/2810 : Chandra Deep Field North Survey. V. (Brandt+, 2001)
J/ApJS/155/271 : Chandra Deep Field-South: Optical spectroscopy (Szokoly+,2004)
J/AJ/127/3121 : TKRS catalog of GOODS-North Field (Wirth+, 2004)
J/A+A/437/883 : K20 survey: spectroscopic catalogue (Mignoli+, 2005)
J/ApJ/653/1004 : Galaxies at 1.4≲z≲3.0 in GOODS-North Field (Reddy+, 2006)
J/A+A/454/423 : GOODS-South Field VLT/FORS2 redshifts. II. (Vanzella+, 2006)
J/ApJ/663/81 : SED of hard X-ray selected AGN in XMDS (Polletta+, 2007)
J/A+A/478/83 : GOODS-South Field VLT/FORS2 redshifts. III. (Vanzella+, 2008)
J/A+A/512/A12 : VLT/VIMOS spectroscopy in GOODS-South field (Balestra+, 2010)
J/ApJS/191/124 : Optical spectroscopy of ECDF-S X-ray sources (Silverman+,2010)
J/ApJ/734/43 : X-ray, optical & radio monitoring of 3C 111 (Chatterjee+,2011)
J/ApJ/731/97 : Variable AGNs in GOODS fields (Sarajedini+, 2011)
J/ApJS/195/10 : The CDF-S survey: 4Ms source catalogs (Xue+, 2011)
J/A+A/549/A63 : GMASS photometry (Kurk+, 2013)
J/A+A/559/A14 : VIMOS VLT Deep Survey final data release (Le Fevre+, 2013)
J/ApJS/205/13 : VLA 1.4GHz survey of ECDF-S (DR2) (Miller+, 2013)
J/MNRAS/428/3089 : X-ray properties of BzK-selected galaxies (Rangel+, 2013)
J/ApJS/214/24 : 3D-HST+CANDELS catalog (Skelton+, 2014)
J/ApJ/794/75 : HST-COS UV spectra observations of AGNs (Stevans+, 2014)
J/MNRAS/449/4204 : WFC3/UVIS quasar-stacked spectrum at z≃2.4 (Lusso+, 2015)
J/AJ/150/31 : Photometry & redshifts of galaxies in the UDF (Rafelski+,2015)
J/AJ/150/153 : Team Keck Redshift Survey 2 (TKRS2) (Wirth+, 2015)
J/ApJS/225/27 : 3D-HST Survey: grism spectra master catalog (Momcheva+, 2016)
J/ApJS/224/15 : Improved 2Ms and 250ks Chandra catalogs (Xue+, 2016)
J/MNRAS/465/2120 : Correct. CIV-based virial black hole masses (Coatman+, 2017)
J/A+A/606/A12 : MUSE-Wide survey: 831 emission line galaxies (Herenz+, 2017)
J/MNRAS/465/302 : Lyman continuum leaking AGN in SSA22 field (Micheva+, 2017)
J/A+A/600/A110 : VIMOS Ultra Deep Survey (VUDS) DR1 (Tasca+, 2017)
J/A+A/618/A85 : Spectroscopy of 3<z<4 quiescent galaxies (Schreiber+ 2018)
J/ApJ/869/123 : Keck Lyman continuum spectroscopic survey (Steidel+, 2018)
J/MNRAS/488/1035 : AGN UV luminosity function (Kulkarni+, 2019)
J/A+A/624/A141 : MUSE-Wide Survey DR1 catalog (Urrutia+, 2019)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh [3/12] Hour of right ascension (J2000)
4- 5 I2 min RAm Minute of right ascension (J2000)
7- 12 F6.3 s RAs Second of right ascension (J2000)
14 A1 --- DE- [±] Sign of declination (J2000)
16- 17 I2 deg DEd Degree of declination (J2000)
19- 20 I2 arcmin DEm Arcminute of declination (J2000)
22- 26 F5.2 arcsec DEs Arcsecond of declination (J2000)
28- 33 F6.4 --- zspec [2.27/4.29] Spectroscopic redshift
35- 39 F5.2 mag Jmag [20.9/27.5]? J-band AB magnitude
41- 46 F6.2 mag MAG1500 [-24.7/-18] absolute magnitude at 1500Å
48- 52 F5.2 mag V-I [-0.15/1.06]? V-I color excess
54- 55 I2 % fAGN [0/97] Percentage of light in the SED from
the AGN at 5000Å
57 I1 --- Dust [1/5]? Dust law (1)
59- 61 F3.1 mag AV [0/3] Extinction
63- 65 F3.1 [yr] [Age] [5.7/9.4] AGN age
67- 71 F5.2 [Msun] [Mass] [7.7/11.8] log(MAGN/M☉)
73 A1 --- l_SFR Limit flag on SFR
75- 79 F5.2 [Msun/yr] SFR [-8.2/4.1] Star formation rate
81- 85 F5.3 --- z [0.004/0.05] Redshift
87- 91 F5.2 --- chi2 [0.06/21] chi2 value
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Note (1): References as follows:
1 = Calzetti+, 2000ApJ...533..682C 2000ApJ...533..682C
2 = Milky Way
3 = Small Magellanic Cloud
4 = Kriek+, 2013ApJ...775L..16K 2013ApJ...775L..16K
5 = Large Magellanic Cloud
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History:
From electronic version of the journal
(End) Prepared by Coralie Fix [CDS], 01-Oct-2021