Access to Astronomical Catalogues

← Click to display the menu
J/A+A/544/A18       Radio galaxies of the local universe     (van Velzen+, 2012)

Radio galaxies of the local universe. All-sky catalog, luminosity functions, and clustering. van Velzen S., Falcke H., Schellart P., Nierstenhoefer N., Kampert K.-H. <Astron. Astrophys. 544, A18 (2012)> =2012A&A...544A..18V
ADC_Keywords: Galaxies, IR ; Galaxies, radio ; Redshifts ; Morphology Keywords: accretion, accretion disks - catalogs - galaxies: jets - galaxies: active - radio continuum: galaxies - methods: statistical Abstract: We present the first catalog of radio-emitting galaxies that covers the entire sky. Our catalog allows the selection of volume-limited subsamples containing all low-power radio galaxies, similar to the prototypical low-power radio galaxies Cen A or M87, within some hundred Mpc. Over 30% of the galaxies in our catalog are not contained in existing large-area extra-galactic radio samples. We find that the local galaxy density in a sphere of 2Mpc centered on the radio galaxies is 1.7 times higher than around non-radio galaxies of the same luminosity and morphology. This significant enhancement suggests a causal relation between external galaxy properties, such as environment or merger history, and the formation of powerful jets in the present universe. Since the enhancement is observed with respect to galaxies of the same luminosity and Hubble type, it is not primarily driven by black hole mass. Our automated matching procedure is found to select radio-emitting galaxies with high efficiency (99%) and purity (91%). Description: The catalog is constructed by matching radio emission of NVSS (1.4GHz, (Cat. VIII/65) ) and SUMSS (843MHz, Cat. VIII/81) to galaxies of the 2MASS Redshift Survey (2MRS, Cat. J/ApJS/199/26) using an image-level algorithm that properly treats the extended structure of radio sources. The sample contains 575 radio-emitting galaxies with a flux greater than 213 mJy at 1.4 GHz or 289 mJy at 843 MHz. Besides this master catalog, we also provide a list of all radio Gaussians that have been matched. We estimate that the expected number of background matches for extended radio sources in our catalog is 11. Most of these random matches can be removed by excluding sources with 'Unknown' morphology (ie, class≡'u'). We note that for a few galaxies that are detected in the overlap region between NVSS and SUMSS, the sum of integrated flux at 1.4GHz is too low compared to the sum of the integrated flux at 843MHz (eg, NGC 1316). This happens when the extended emission is resolved out in the NVSS images (the Fsyn column can be used to avoid this complication). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file master.dat 308 575 The master catalog, one entry per galaxy matches.dat 71 2009 The catalog listing each radio match per galaxy
See also: VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006) VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998) VIII/81 : Sydney University Molonglo Sky Survey, SUMSS V2.1 (Mauch+ 2008) J/ApJS/199/26 : The 2MASS Redshift Survey (2MRS) (Huchra+, 2012) Byte-by-byte Description of file: master.dat
Bytes Format Units Label Explanations
1- 16 A16 --- 2MASX Target name of galaxy from 2MRS, HHMMSSss+DDMMSSs 18- 40 A23 --- NEDname NED name of galaxy 42- 50 F9.5 deg RAdeg Right ascension of galaxy (J2000) 52- 60 F9.5 deg DEdeg Declination of galaxy (J2000) 62- 70 F9.5 deg GLON Galactic longitude 72- 80 F9.5 deg GLAT Galactic latitude 82- 87 F6.3 mag Kmag K-band isophotal flux in AB mag (1) 89- 94 F6.3 mag e_Kmag rms uncertainty on Kmag in AB mag(2) 96-106 F11.9 --- z Heliocentric redshift 108-118 F11.9 --- zdist Peculiar-velocity corrected redshift 120-130 F11.9 --- e_zdist Uncertainty on zdist 132-137 F6.2 Mpc Dist Mean of NED-D and Hubble dist (3) 139-144 F6.2 Mpc e_Dist Uncertainty on Dist 146-147 I2 --- TT Galaxy morphological type code (4) 149-150 I2 --- Ns Number of SUMSS sources matched (5) 152-153 I2 --- Nn Number of NVSS sources matched (5) 155-164 F10.2 mJy F1400 ?=0 Sum integrated flux at 1.4GHz (6) 166-175 F10.2 mJy e_F1400 rms uncertainty on F1400 177-186 F10.2 mJy F843 ?=0 Integrated flux at 843MHz (6) 188-197 F10.2 mJy e_F843 rms uncertainty on F843 199-208 F10.2 mJy Fsyn Synthetic flux at 1.1GHz (8)(7) 210-219 E10.3 10-7W Lsyn Synthetic luminosity, νLν, at 1.1GHz (8) 221-228 F8.6 deg Samaj Sum major axis FWHM of matches (8) 230-237 F8.6 deg Mamaj Max major axis FWHM of matched (8) 239 I1 --- l_Mamaj [0/1] Limit flag on major axis (9) 241-248 F8.6 deg dMax Maximum distance of matches to galaxy 250-257 F8.6 deg dMin Minimum distance of matches to galaxy 259-266 F8.6 deg dcont Distance of the galaxy to the second-highest radio contour (10) 268-276 F9.5 deg RAgdeg Right ascension of geometrical center (J2000) (11) 278-286 F9.5 deg DEgdeg Declination of geometrical center (J2000) (11) 288-296 F9.5 deg RAfdeg Right ascension of flux-weighted center (J2000) (11) 298-306 F9.5 deg DEfdeg Declination of flux-weighted center (J2000) (11) 308 A1 --- cl [pgju] Classification on morphology (12)
Note (1): Corrected for galactic extinction. Note (2): Uncertainties are 1-sigma (68% symmetric confidence interval). Note (3): Inverse-variance weighted mean of distance from NED-D and peculiar velocity corrected Hubble-distance (h=0.72). Note (4): Galaxy type runs from -9 to 9, encoding the Hubble sequence, or 98 if galaxy has never been examined (see Huchra et al., 2012, Cat. J/ApJS/199/26, Table A8). Note (5): We count the number of matched Gaussian after manual rejection. Note (6): Zero if no matches at this frequency. Note (7): Obtained using a fixed spectral index of alpha=-0.6. Note (8): When both NVSS and SUMSS matches are available, we the pick the largest value. Note (9): Limit flag on major axis is 1 if source is not resolved in both NVSS and SUMSS. Note (10): The distance of the galaxy to the second-highest radio contour, zero if within contour. Note (11): When both NVSS and SUMSS matches are available, we use the mean. Note (12): Classification on morphology as follows: p = Point sources g = Starforming galaxies j = Jets & lobes u = Unknown
Byte-by-byte Description of file: matches.dat
Bytes Format Units Label Explanations
1- 16 A16 --- 2MASX Target name of galaxy from 2MRS, HHMMSSss+DDMMSSs 18 A1 --- Cat [NS] Radio catalog (N=NVSS, S=SUMSS) 20- 28 F9.5 deg RAdeg Right Ascension of radio Gaussian (J2000) 30- 38 F9.5 deg DEdeg Declination of radio Gaussian (J2000) 40- 47 F8.6 deg amaj FWHM of major axis (deconvolved) 49 I1 --- f_amaj [0/1] Limit flag on major axis (1) 51- 60 F10.2 mJy F1400 ?=0 Integrated flux at 1.4GHz (2) 62- 71 F10.2 mJy F843 ?=0 Integrated flux at 843MHz (3)
Note (1): flag is zero if source is resolved Note (2): zero if Cat = 'S' Note (3): zero if Cat = 'N'
Acknowledgements: Sjoert van Velzen, s.vanvelzen (at)astro.ru.nl
(End) S. van Velzen [Radboud Univ. Nijmegen], P. Vannier [CDS] 18-Jun-2012
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact