J/ApJS/235/34 Deep JVLA imaging of GOODS-N at 20cm (Owen, 2018)
Deep JVLA imaging of GOODS-N at 20 cm.
Owen F.N.
<Astrophys. J. Suppl. Ser., 235, 34 (2018)>
=2018ApJS..235...34O 2018ApJS..235...34O
ADC_Keywords: Galaxies, radio; Redshifts; Optical
Keywords: cosmology: observations; galaxies: evolution; galaxies: starburst;
surveys
Abstract:
New wideband continuum observations in the 1-2GHz band of the GOODS-N
field using NSF's Karl G. Jansky Very Large Array (VLA) are presented.
The best image with an effective frequency of 1525MHz reaches an rms
noise in the field center of 2.2µJy, with 1.6" resolution. A
catalog of 795 sources is presented covering a radius of 9 arcminutes
centered near the nominal center for the GOODS-N field, very near the
nominal VLA pointing center for the observations. Optical/NIR
identifications and redshift estimates both from ground-based and HST
observations are discussed. Using these optical/NIR data, it is most
likely that fewer than 2% of the sources without confusion problems do
not have a correct identification. A large subset of the detected
sources have radio sizes >1". It is shown that the radio orientations
for such sources correlate well with the HST source orientations,
especially for z<1. This suggests that a least a large subset of the
10kpc-scale disks of luminous infrared/ultraluminous infrared galaxies
(LIRG/ULIRG) have strong star formation, not just in the nucleus. For
the half of the objects with z>1, the sample must be some mixture of
very high star formation rates, typically 300M☉/yr, assuming
pure star formation, and an active galactic nucleus (AGN) or a mixed
AGN/star formation population.
Description:
New wideband continuum observations in the 1-2GHz band of the GOODS-N
field using NSF's Karl G. Jansky Very Large Array (VLA) are presented.
The GOODS-N field was observed in the A-configuration for a total of
39hr, including calibration and move time between 2011 August 9 and
September 11.
A single field was observed, centered at
RAJ2000=12:36:49.4,DEJ2000=+62:12:58.
The observations covered the bands from 1000-1512 and 1520-2032MHz
using 1MHz channels.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 108 795 GOODS-N radio source catalog
table2.dat 87 39 *Sources without NIR IDs based on equation 1
table3.dat 43 169 Radio and HSTz optical position angles for resolved
sources with radio major axes >1"
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Note on table2.dat: We considered the 39/795 radio sources that do not have
NIR identifications based on the criteria detailed in section 5.2.1.
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See also:
II/261 : GOODS initial results (Giavalisco+, 2004)
J/ApJ/378/65 : 8.4GHz observations of compact starbursts (Condon+ 1991)
J/AJ/112/1335 : Hubble Deep Field observations (Williams+ 1996)
J/ApJ/533/611 : 1.4GHz survey in HDF region (Richards+, 2000)
J/ApJ/554/803 : New VLA Sky Survey (NVSS) Cat. of IRAS 2Jy Gal. (Yun+ 2001)
J/AJ/126/632 : UBVRIz'HK' photom. of 2Ms CDFN X-ray sources (Barger+, 2003)
J/AJ/127/3137 : Hawaii redshifts in the ACS-GOODS region (Cowie+, 2004)
J/ApJ/622/772 : Redshift survey of submillimeter galaxies (Chapman+, 2005)
J/MNRAS/358/1159 : Radio sources in HDF and HFF (Muxlow+, 2005)
J/ApJ/653/1004 : Galaxies at 1.4≲z≲3.0 in GOODS-North Field (Reddy+, 2006)
J/ApJ/689/687 : GOODS-N spectroscopic survey (Barger+, 2008)
J/ApJS/188/178 : VLA 1.4GHz obs. of GOODS-North field (Morrison+, 2010)
J/ApJ/714/1305 : The Deep SWIRE Field (DSF) IV. (Strazzullo+, 2010)
J/ApJS/187/251 : Ultradeep Ks imaging in the GOODS-N (Wang+, 2010)
J/A+A/555/A23 : M82-A radio continuum & polarisation. I. (Adebahr+, 2013)
J/ApJ/784/9 : SCUBA-2 high-redshift galaxies sample (Barger+, 2014)
J/ApJS/214/24 : 3D-HST+CANDELS catalog (Skelton+, 2014)
J/ApJS/215/27 : Photometric redshifts in the Hawaii-HDF-N (Yang+, 2014)
J/ApJS/218/33 : Spitzer-CANDELS catalog within 5 deep fields (Ashby+, 2015)
J/ApJ/799/10 : Arp 220 6 and 33GHz images (Barcos-Munoz+, 2015)
J/AJ/150/153 : Team Keck Redshift Survey 2 (TKRS2) (Wirth+, 2015)
J/MNRAS/462/2934 : Lockman Hole North 3GHz catalogue (Vernstrom+, 2016)
J/ApJS/225/27 : 3D-HST Survey: grism spectra master cat. (Momcheva+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- [O2018] Catalog source name (JHHMMSS.s+DDMMSS)
18- 19 I2 h RAh [12] Hour of Right Ascension (J2000)
21- 22 I2 min RAm [35/38] Minutes of Right Ascension (J2000)
24- 28 F5.2 s RAs Seconds of Right Ascension (J2000)
30- 33 F4.2 s e_RAs [0.01/0.08] Error in RAs
35 A1 --- DE- [+] Sign of Declination (J2000)
36- 37 I2 deg DEd [62] Degrees of Declination (J2000)
39- 40 I2 arcmin DEm [5/23] Arcminute of Declination (J2000)
42- 45 F4.1 arcsec DEs Arcsecond of Declination (J2000)
47- 49 F3.1 arcsec e_DEs [0.1/0.5] Error in DEs
51- 56 F6.1 uJy/beam Peak [12/4520] Observed peak brightness (1)
58- 60 F3.1 uJy/beam e_Peak [2/10] Error in peak brightness (1)
62- 67 F6.1 uJy Total [12/5370] Total Flux Density
69- 73 F5.1 uJy e_Total [2/162] Error in Total
75- 80 F6.1 --- S/N [5/1007] Peak Signal/Noise Ratio
82 A1 --- l_Size Limit flag for size
83- 86 F4.1 arcsec Bmaj [0.2/45.2] Fitted Gaussian major axis FWHM (2)
88- 90 F3.1 arcsec bmin [0/4.3]? Fitted Gaussian minor axis FWHM
92- 94 I3 deg PA ? Fitted position angle
96- 98 F3.1 arcsec Res [1/6] Image resolution use for catalog entry
100-104 F5.3 --- z [0/5.6]? Best redshift available
105 A1 --- f_z p= Photometric or s= Spectroscopic for z
106-108 A3 --- r_z Reference for z (3)
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Note (1): In units of microJanskeys/beam and uncorrected for primary beam or
bandwidth smearing.
Note (2): Or maximum size for very resolved sources.
Note (3): Reference as follows:
B = Barger, Cowie & Wang (2008, J/ApJ/689/687);
B03 = Barger et al. (2003, J/AJ/126/632);
C = Chapman et al. (2005, J/ApJ/622/772);
Co = Cowie et al. (2004, J/AJ/127/3137);
H = Momcheva et al. (2016, J/ApJS/225/27);
M = Wirth et al. (2015, J/AJ/150/153);
R = Reddy et al. (2006, J/ApJ/653/1004);
Q = Yang et al. (2014, J/ApJS/215/27);
W = Wang et al. (2010, J/ApJS/187/251).
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- [O2018] Catalog source name (JHHMMSS.s+DDMMSS)
18- 20 A3 --- HST HST image exists? (yes/no)
22- 27 A6 --- Source Source of image used for ID (1)
29- 32 F4.2 arcsec Offset [0/4] Distance of nearest ID candidate
from radio source
34- 37 F4.2 arcsec Limit [0.3/1.6] Maximum offset for ID from Eq 1 (2)
39 A1 --- l_Size Limit flag on Size
40- 42 F3.1 arcsec Size [0.4/4] Radio source size
44- 46 A3 --- Blend Likely blend of two or more radio sources?
48- 50 A3 --- Conf Optical field confused? (yes/no)
52- 87 A36 --- Notes Notes of optical field
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Note (1): Source of optical/NIR identification used for offsets as follows:
Wang = Wang et al. (2010, J/ApJS/187/251);
Yang = Yang et al. (2014, J/ApJS/215/27);
HST1.6 = Koekemoer et al. (2011ApJS..197...36K 2011ApJS..197...36K);
HST1.2 = Koekemoer et al. (2011ApJS..197...36K 2011ApJS..197...36K)
HST814 = Koekemoer et al. (2011ApJS..197...36K 2011ApJS..197...36K)
HSTz = Giavalisco et al. (2004, II/261).
Note (2): In order to be considered an identification, sources were required to
be within a radius given in Equation (1) as:
radius = (0.22+PE2+SE2)0.5arcsec
where radius is the distance of a Ks identification from the radio
source centroid in arcseconds; PE is twice the radio position error
estimate from JMFIT (columns "e_RAs" and "e_DEs" of Table 1 added
in quadrature); SE=0.3xBmaj and Bmaj is the fitted major axis size or
the upper limit to that size in Table 1.
SE is limited to a maximum of 1.0". See section 5.2.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- [O2018] Catalog source name (JHHMMSS.s+DDMMSS)
18 A1 --- T ID Type ("B"= binary or multiple galaxies or
"G"=individual galaxy)
20- 22 I3 deg RPA Radio position angle from JMFIT
24- 25 I2 deg e_RPA [1/45] Error in RPA
27- 29 F3.1 arcsec Res [1/6] Resolution of image used for RPA
31- 33 I3 deg OPA Optical position angle from the HSTz image
(Giavalisco et al. 2004, II/261)
35- 38 F4.1 arcsec RSize [1/43] Radio major axis size
40- 43 F4.1 arcsec OSize [0.5/11] Optical major axis size
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 23-Aug-2018