J/MNRAS/406/197 Ultra-steep spectrum radio sources in SDSS (Bornancini+, 2010)
Radio galaxies in the Sloan Digital Sky Survey: spectral index-environment
correlations.
Bornancini C.G., O'Mill A.L., Gurovich S., Lambas D.G.
<Mon. Not. R. Astron. Soc., 406, 197-207 (2010)>
=2010MNRAS.406..197B 2010MNRAS.406..197B
ADC_Keywords: Surveys ; Galaxies, radio ; Redshifts
Keywords: surveys - galaxies: high-redshift - radio continuum: galaxies -
radio continuum: general
Abstract:
We analyse optical and radio properties of radio galaxies detected in
the Sloan Digital Sky Survey. The sample of radio sources is selected
from the catalogue of Kimball & Ivezic (2008AJ....136..684K 2008AJ....136..684K) with flux
densities at 325, 1400 and 4850MHz, using Westerbork Northern Sky
Survey, NRAO VLA Sky Survey and Green Bank 6cm radio surveys and from
flux measurements at 74MHz taken from Very Large Array Low-Frequency
Sky Survey (Cohen et al. 2006, Cat. VIII/79). We study radio galaxy
spectral properties using radio colour-colour diagrams and find that
our sample follows a single power law from 74 to 4850MHz.
Description:
The sample of radio sources was selected from the catalogue of Kimball
& Ivezic (2008AJ....136..684K 2008AJ....136..684K). The sample of optical galaxies in the
fields of radio sources was selected using the Catalog Archive Server
Jobs System (CASJOBS) interface of SDSS, which allows one to obtain
catalogues with parameters from the SDSS Data Release 6 (DR6).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 85 99 Sample of ultrasteep spectra (USS) radio sources
in the SDSS catalogue with spectroscopic redshifts
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See also:
VIII/79 : The VLA Low-frequency Sky Survey at 74MHz (Cohen+ 2007)
J/A+AS/108/79 : Ultra-steep spectrum radiosources (Roettgering+, 1994)
J/A+AS/143/303 : Ultra steep spectrum radio sources catalog (De Breuck+ 2000)
J/AJ/123/637 : Ultra-steep-spectrum radio sources (De Breuck +, 2002)
J/A+A/436/457 : Ultra-steep spectrum radio sources (Gopal-Krishna+, 2005)
J/MNRAS/381/341 : MRCR-SUMSS Ultra-steep-spectrum sample (Broderick+ 2007)
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 I7 --- [KI2008] Radio source number in Kimball & Ivezic
(2008AJ....136..684K 2008AJ....136..684K)
9- 10 I2 h RAh Radio right ascension (J2000)
12- 13 I2 min RAm Radio right ascension (J2000)
15- 19 F5.2 s RAs Radio right ascension (J2000)
21 A1 --- DE- Radio declination sign (J2000)
22- 23 I2 deg DEd Radio declination (J2000)
25- 26 I2 arcmin DEm Radio declination (J2000)
28- 32 F5.2 arcsec DEs Radio declination (J2000)
34- 39 F6.4 --- z Spectroscopic redshift
41- 45 F5.2 --- alpha Spectral index between 1400MHz and 325MHz
47- 51 F5.2 [W/Hz] logL1.4 1.4GHz luminosity
53- 58 F6.2 mag rMAG Absolute r magnitude
60- 85 A26 --- Name ID from literature
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 22-Dec-2010