J/other/RAA/20.25 Sample of 966 AGNs (Pei+, 2020)
The relationship between the radio core-dominance parameter and spectral index
in different classes of extragalactic radio sources (III).
Pei Z.-Y., Fan J.-H., Bastieri D., Yang J.-H., Xiao H.-B., Yang W.-X.
<Res. Astron. Astrophys., 20, 25 (2020)>
=2020RAA....20...25P 2020RAA....20...25P (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Radio sources
Keywords: galaxies: active - galaxies: general - galaxies: jets -
quasars: general
Abstract:
Active galactic nuclei (AGNs) can be divided into two major classes,
namely radio-loud and radio-quiet AGNs. A small subset of the
radio-loud AGNs is called blazars, which are believed to be unified
with Fanaroff-Riley type I and type II (FRI&II) radio galaxies.
Following our previous work, we present a latest sample of 966 sources
with measured radio flux densities of the core and extended
components. The sample includes 83 BL Lacs, 473 flat spectrum radio
quasars, 101 Seyferts, 245 galaxies, 52 FRIs&IIs and 12 unidentified
sources. We then calculate the radio core-dominance parameters and
spectral indices and study their relationship. Our analysis shows that
the core-dominance parameters and spectral indices are quite different
for different types of sources. We also confirm that the correlation
between core-dominance parameter and radio spectral index extends over
all the sources in a large sample presented.
Description:
We compile 966 objects with the relevant data to calculate the
core-dominance parameters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 93 966 Sample for the whole sources
refs.dat 69 33 References
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See also:
J/other/RAA/19.70 : Sample of 2400 AGNs (Pei+, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Source name
14- 20 A7 --- Class Classification (1)
22- 29 F8.6 --- z Redshift
31 I1 GHz nu1 [4/5]? First frequency for emission
33- 39 F7.2 mJy Score Core-emission at nu1
41- 48 F8.2 mJy Sext ?=- Extended emission at nu1
50- 57 F8.2 mJy STotal1 ?=- Total emission at nu1
59- 64 A6 --- r_Score Reference for Score, Sext and STotal1,
in refs.dat file
67- 71 F5.2 [-] logR Core-dominance parameter at 5 GHz
73- 76 F4.2 GHz nu2 [0.85/4.85]?=- Second frequency (from NED)
78- 87 F10.3 mJy STotal2 ?=- Total emission at nu2 (from NED)
89- 93 F5.2 --- alpha ?=- Radio spectral index, alphaR
(Snu ∝ nu-alphaR (from NED)
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Note (1): Classification as follows:
BL Lac = BL Lacertae object
FSRQ = flat spectrum radio quasar
Seyfert = Seyfert galaxy
G = galaxy
FRI&II = Fanaroff-Riley type I or II radio galaxy
U = unidentified sources
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Ref Reference code
8- 26 A19 --- BibCode BibCode
28- 47 A20 --- Aut Author's name
48- 69 A22 --- Com Comments
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History:
From electronic version of the journal
References:
Fan et al., Paper I 2011RAA....11.1413F 2011RAA....11.1413F
Pei et al., Paper II 2019RAA....19...70P 2019RAA....19...70P, Cat. J/other/RAA/19.70
(End) Patricia Vannier [CDS] 19-Aug-2021