J/AN/341/703 Radio spectral indices of active galaxies (Abrahamyan, 2020)
The nature of active galaxies based on their radio properties.
Abrahamyan H. V.
<Astron. Nachrichten 341, 703-712 (2020)>
=2020AN....341..703A 2020AN....341..703A (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei; Radio sources; Redshifts; Magnitudes, absolute
Keywords: AGN; LINER; QSO; radio galaxy; radio spectral index; Seyfert
Abstract:
In this paper, we investigate radio properties of active galaxies
taken from the reference Veron-Cetty & Veron (2010, Cat. VII/258)
catalog. The galaxies are limited to magnitudes in the range of
12m-19m. We have cross-correlated the list with radio catalogs and
selected those galaxies that have data on six or more radio fluxes at
different wavelengths. As a result, we have 198 galaxies that satisfy
these conditions. Using SDSS DR15, we have obtained 96 spectroscopic
identifications of the 198 objects. After the classification, 85% of
the 96 objects have changed their types. Available data on the
classification of these objects and our classification showed that
56.7% of them are Seyfert galaxies. For all the objects, we have built
radio spectra and estimated radio spectral indices. As a result, we
obtain α≥-0.6089±0.056> (αSeyfert=-0.6013±0.027,
αLINER=-0.5955±0.025, αHII=-0.6672±0.039,
αComp.=-0.7128±0.043). We discuss the radio properties of
active galaxies based on their radio spectral indices.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6.dat 85 198 Information of radio spectral indices, absolute
magnitude, and luminosity
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See also:
VIII/1 : The 3C and 3CR Catalogues (Edge+ 1959-1962)
VIII/4 : Fourth Cambridge Survey (4C) (Pilkington+ 1965; Gower+ 1967)
VIII/14 : 87GB Catalog of radio sources (Gregory+, 1991)
VIII/16 : Molonglo Reference Catalogue of Radio Sources (Large+ 1991)
VIII/31 : Revised source list for the Rees 38-MHz (8C) survey (Hales+ 1995)
VIII/40 : GB6 catalog of radio sources (Gregory+ 1996)
VIII/42 : Texas Survey of radio sources at 365MHz (Douglas+ 1996)
VIII/44 : Miyun 232MHz survey (Zhang+ 1997)
VIII/62 : The Westerbork Northern Sky Survey (WENSS) (Leiden, 1998)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VIII/69 : The WISH catalogue at 352 MHz (de Breuck+ 2002)
VIII/72 : CLASS survey of radio sources (Myers+, 2003)
VIII/84 : A final non-redundant catalogue for 7C 151-MHz survey (Hales+ 2007)
VIII/81 : Sydney University Molonglo Sky Survey (SUMSS V2.1) (Mauch+ 2008)
VII/258 : Quasars and Active Galactic Nuclei (13th Ed.) (Veron+ 2010)
VIII/97 : 74MHz VLA Low-frequency Sky Survey Redux (VLSSr) (Lane+, 2014)
VIII/92 : The FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015)
VII/274 : The Roma BZCAT - 5th edition (Massaro+, 2015)
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
VII/286 : SDSS quasar catalog, fourteenth data release (Paris+, 2018)
J/MNRAS/342/915 : 9C survey at 15GHz (Waldram+, 2003)
J/ApJ/607/665 : Type Ia supernovae at z>1 discovered by HST (Riess+, 2004)
J/MNRAS/415/2708 : 10C survey of radio sources at 15.7GHz (Davies+, 2011)
J/A+A/598/A78 : The GMRT 150MHz all-sky radio survey (Intema+, 2017)
J/PAZh/44/383 : Byurakan-IRAS gal. with SDSS spectra (Mickaelian+, 2018)
J/A+A/624/A145 : Astrometric Catalogue 5, LQAC-5 (Souchay+, 2019)
J/AN/340/437 : Optical variability of blazars (Abrahamyan+, 2019)
J/other/Ap/62.147 : Activity types of ROSAT/SDSS galaxies (Paronyan+, 2019)
J/other/Ap/63.322 : Activity type of AGN with SDSS spectra (Abrahamyan+, 2020)
http://www.sdss.org/ : SDSS home page
Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 10 F10.6 deg RAdeg Right ascension in decimal degrees (J2000)
from VII/258 (VCV13)
13- 22 F10.6 deg DEdeg Declination in decimal degrees (J2000)
from VII/258 (VCV13)
23 A1 --- f_coo [a] Flag on coo (1)
25- 29 F5.3 --- z [0.001/0.42] Redshift from VII/258 (VCV13)
32- 40 A9 --- ATold Old activity type
43- 52 A10 --- ATnew New activity type
55- 60 F6.2 mag Mabs [-23.52/-15.62] Absolute magnitude
63- 68 F6.3 10+36W Lum [0.058/84] Luminosity; in 1043erg/s units
71- 78 F8.5 --- alpha [-1.15/0.67] Radio spectral index α
81- 85 F5.3 --- e_alpha [0.012/0.11] alpha uncertainty
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Note (1):
a = According to Flesch (2013PASA...30....4F 2013PASA...30....4F), the position of the AGN
[VV2010c] J002113.2-191044 in Veron-Cetty and Veron (2010, VII/258) is 89" off;
the correct position would be 00 21 07.5 -19 10 06.
Hence the coordinates have been updated in VizieR.
Note added by CDS.
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Acknowledgements:
Areg Mickaelian
(End) Emmanuelle Perret [CDS] 08-Jan-2021