J/ApJS/123/41  Radio galaxies in Las Campanas redshift survey (Machalski+, 1999)

Radio emission from galaxies in the Las Campanas redshift survey. Machalski J., Condon J.J. <Astrophys. J. Suppl. Ser. 123, 41 (1999)> =1999ApJS..123...41M 1999ApJS..123...41M
ADC_Keywords: Redshifts ; Galaxies, IR ; Galaxies, radio Keywords: catalogs - galaxies: active - galaxies: starburst - radio continuum: galaxies - surveys Abstract: To increase the redshift range and look-back time over which the radio luminosity function can be measured directly, we identified 1157 galaxies in the Las Campanas Redshift Survey (LCRS, Cat. VII/203) having isophotal (red) magnitudes mISO≤18.0 with radio sources brighter than 2.5mJy/beam in the 1.4GHz NRAO VLA Sky Survey (NVSS, 1998AJ....115.1693C 1998AJ....115.1693C). Since the NVSS has 45" FWHM angular resolution, these radio and optical limits include nearly all LCRS galaxies with 1.4GHz luminosities L≥1022.4W/Hz at z∼0.05 to L≥1023.6W/Hz at z∼0.2. The mean redshift ∼0.14 of the radio-detected galaxies is higher than the mean redshift ∼0.10 of the optical sample. This indicates that, statistically, the radio emission was detected from galaxies with the highest optical luminosities. Of the 1157 galaxies, 261 were also identified with far-infrared (FIR) sources in the IRAS Point Source Catalog and Faint Source Catalog. The principal radio energy sources in all identified galaxies were classified as either "starburst" or "AGN" on the basis of their FIR-radio flux ratios, FIR spectral indices, and radio-optical flux ratios. We show that the radio-optical flux ratio can be effectively used to classify the dominant energy source for the radio emission even if FIR fluxes and radio morphological data are not available. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table2.dat 126 1157 Optical, radio, and infrared data -------------------------------------------------------------------------------- See also: VII/203 : Las Campanas Redshift Survey (Shectman+ 1996) Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 19 A19 --- LCRS LCRS IAU name 21- 22 I2 h RAh Right ascension (J2000) 24- 25 I2 min RAm Right ascension (J2000) 27- 31 F5.2 s RAs Right ascension (J2000) 33 A1 --- DE- Declination sign (J2000) 34- 35 I2 deg DEd Declination (J2000) 37- 38 I2 arcmin DEm Declination (J2000) 40- 43 F4.1 arcsec DEs Declination (J2000) 45- 49 F5.2 mag mISO ISO magnitude 50 A1 --- n_mISO [*] *: magnitude estimated from the Digitized Sky Survey (DSS) 51- 56 F6.4 --- z Redshift 58- 63 F6.2 mag RMAG Absolute R magnitude 64- 69 F6.1 mJy S1.4GHz Flux density at 1.4GHz 70 A1 --- u_S1.4GHz [)] Uncertainty flag on S1.4GHz 72- 76 F5.2 [W/Hz] logL1.4GHz 1.4GHz spectral luminosity 78 A1 --- l_S25um Limit flag on S25um 79- 82 I4 mJy S25um ? Flux density at 25µm 84- 88 I5 mJy S60um ? Flux density at 60µm 91- 95 I5 mJy S100um ? Flux density at 100µm 99 A1 --- l_SI Limit flag on SI 100-103 F4.2 --- SI ? Spectral index between 25um and 60µm 105 A1 --- l_q Limit flag on q 106-110 F5.2 --- q ? FIR-radio flux ratio parameter 112-116 F5.2 --- r Radio-optical flux-ratio parameter 117 A1 --- u_r [)] Uncertainty flag on r 119-124 A6 --- Type Dominant radio energy source (1) 126 I1 --- Fig [1/2]? Figure number (2) -------------------------------------------------------------------------------- Note (1): S: stars, AGN: active galactic nuclei Note (2): Figure number for the contour plot showing the NVSS map overlaid on the optical DSS image -------------------------------------------------------------------------------- History: From ApJS electronic version
(End) James Marcout, Patricia Bauer [CDS] 14-Sep-1999
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