J/ApJ/733/69 Polarized DRAO sources (Banfield+, 2011)
Polarized radio sources: a study of luminosity, redshift, and infrared colors.
Banfield J.K., George S.J., Taylor A.R., Stil J.M., Kothes R., Scott D.
<Astrophys. J., 733, 69 (2011)>
=2011ApJ...733...69B 2011ApJ...733...69B
ADC_Keywords: Galaxies, radio ; Galaxies, IR ; Polarization ; Radio continuum ;
Redshifts ; Cross identifications
Keywords: galaxies: evolution - galaxies: magnetic fields - infrared: galaxies -
radio continuum: galaxies
Abstract:
The Dominion Radio Astrophysical Observatory Deep Field polarization
study has been matched with the Spitzer Wide-Area Infrared
Extragalactic Survey of the European Large Area Infrared Space
Observatory Survey North 1 field. We have used Very Large Array
observations with a total intensity rms of 87uJy/beam to match SWIRE
counterparts to the radio sources. Infrared color analysis of our
radio sample shows that the majority of polarized sources are
elliptical galaxies with an embedded active galactic nucleus. Using
available redshift catalogs, we found 429 radio sources of which 69
are polarized with redshifts in the range of 0.04<z<3.2. We find no
correlation between redshift and percentage polarization for our
sample. However, for polarized radio sources, we find a weak
correlation between increasing percentage polarization and decreasing
luminosity.
Description:
The data presented in this paper cover the European Large Area ISO
Survey North 1 region (ELAIS N1; Oliver et al. 2000MNRAS.316..749O 2000MNRAS.316..749O)
centered on RA=16:10, DEC=54:30:36 (J2000).
The 1.4GHz radio source sample used in this paper was taken from Grant
et al. (2010, Cat. J/ApJ/714/1689) and was observed with the Dominion
Radio Astrophysical Observatory synthesis telescope (DRAO ST).
High-resolution (θ=3.9") observations of the DRAO Planck Deep
Fields ELAIS N1 region were carried out with the Very Large Array
(VLA) in 2007 October.
The infrared and optical observations of the 8.72deg2 ELAIS N1
region were taken from the SWIRE ELAIS N1 source catalog (Surace et
al. 2004, Cat. II/255).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 96 69 Polarized sources with a redshift from the DRAO
deep field radio source catalog
table5.dat 81 16 DRAO deep field radio sources matched to spiral
galaxies in the SWIRE ELAIS N1 field with upper
limits on percentage polarization ΠUL
table6.dat 79 18 DRAO deep field infrared faint radio sources
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See also:
VIII/90 : The FIRST Survey Catalog, Version 12Feb16 (Becker+ 2012)
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
II/290 : SWIRE Photometric Redshift Catalogue (Rowan-Robinson+, 2008)
II/255 : SWIRE ELAIS N1 Source Catalogs (Surace+, 2004)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VIII/62 : The Westerbork Northern Sky Survey (Leiden, 1998)
J/ApJ/714/1689 : DRAO ELAIS N1 catalog (Grant+, 2010)
J/MNRAS/409/821 : Radio sources with ultrahigh polarization (Shi+, 2010)
J/MNRAS/402/2792 : 1388MHz ATLBS Low-Brightness Survey (Subrahmanyan+, 2010)
J/MNRAS/395/269 : ELAIS-N1 field 325MHz observations (Sirothia+, 2009)
J/MNRAS/383/75 : Deep 610MHz survey of ELAIS-N1 sources (Garn+, 2008)
J/MNRAS/379/1343 : IR study of UKIDSS massive supercluster (Swinbank+, 2007)
J/ApJ/666/201 : Radio polarimetry of the ELAIS N1 field (Taylor+, 2007)
J/AJ/132/2409 : Deep ATLAS radio observations of CDFS (Norris+, 2006)
J/MNRAS/371/898 : Extragalactic 20GHz radio sources (Sadler+, 2006)
J/MNRAS/358/333 : ELAIS opt. ident. at 15um+1.4GHz (Gonzalez-Solares+, 2005)
J/MNRAS/343/293 : ELAIS deep X-ray survey. I. (Manners+, 2003)
J/MNRAS/302/222 : ISO ELAIS 20cm VLA survey regions (Ciliegi+, 1999)
Byte-by-byte Description of file: table[36].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- --- [DRAOJ_]
7- 25 A19 --- DRAO DRAO deep field name (HHMMSS.ss+DDMMSS.ss; J2000)
27- 32 I6 --- SWIRE ? SWIRE number (only for table 3)
34- 39 F6.2 mJy S1.4 1.4GHz flux density (1)
41- 44 F4.2 mJy e_S1.4 S1.4 uncertainty
46- 50 F5.2 mJy P0 ? Bias-corrected polarized flux density (P0) (1)
52- 55 F4.2 mJy e_P0 ? P0 uncertainty
57- 61 F5.2 % Pi0 ? Percentage polarization (Π0) (1)
63- 67 F5.2 % e_Pi0 ? Pi0 uncertainty
69 A1 --- l_alpha Limit flag on alpha
70- 74 F5.2 --- alpha Spectral index α1420325 (2)
76- 79 F4.2 --- e_alpha ? alpha uncertainty
81- 85 F5.3 --- z ? Redshift (only for table 3)
87 A1 --- r_z [a-c] Redshift reference (3)
89- 96 E8.4 W/Hz L1.4 ? 1.4GHz luminosity (only for table 3)
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Note (1): The flux density and polarization information comes from the Grant et
al. (2010, Cat. J/ApJ/714/1689) source catalog.
Note (2): The spectral indices are calculated from the 1.4GHz and 325MHz flux
density from WENSS.
Note (3): Reference as follows:
a = Photometric redshift from SDSS DR7 (Abazajian et al. 2009, Cat. II/294).
b = Photometric redshift from Rowan-Robinson et al. (2008, Cat. II/290).
c = Spectroscopic redshift from Rowan-Robinson et al. (2008, Cat. II/290) and
references within.
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- --- [DRAO_J]
7- 25 A19 --- DRAO DRAO deep field name (HHMMSS.ss+DDMMSS.ss; J2000)
27- 50 A24 --- Name Galaxy name
52- 62 A11 --- Type Galaxy morphological type
63- 66 F4.2 --- z Redshift
67 A1 --- r_z [a-c] Redshift reference (1)
69- 72 F4.2 mJy S1.4 1.4GHz flux density
74- 77 F4.2 mJy e_S1.4 S1.4 uncertainty
79 A1 --- l_PiUL Limit flag on PiUL
80- 81 I2 % PiUL Upper limits on percentage polarization (ΠUL)
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Note (1): Reference as follows:
a = Photometric redshift from Rowan-Robinson et al. (2008, Cat. II/290).
b = Spectroscopic redshift.
c = Photometric redshift from SDSS DR7 (Abazajian et al. 2009, Cat. II/294).
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 08-Nov-2012