J/A+A/703/A202 Comprehensive radio study of NLS1s (Varglund+, 2025)
A comprehensive radio study of narrow-line Seyfert 1 galaxies.
Varglund I., Jaervelae E., Hardcastle M.J., Varglund S., Laehteenmaeki A.
<Astron. Astrophys. 703, A202 (2025)>
=2025A&A...703A.202V 2025A&A...703A.202V (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Radio sources
Keywords: galaxies: active - galaxies: jets - galaxies: Seyfert -
galaxies: star formation - galaxies: statistics -
radio continuum: galaxies
Abstract:
Narrow-line Seyfert 1 (NLS1) galaxies are a type of active galactic
nuclei (AGN) that were originally classified as sources with little to
no radio emission. Although the class is rather unified from an
optical perspective, their radio characteristics are diverse. One of
the biggest curiosities found in these sources is their ability to
form and maintain powerful relativistic jets. We studied the radio
properties of a sample of 3998 NLS1 galaxies which is the largest
clean sample available, thus allowing us to study the population-wide
characteristics. We used both historical and ongoing surveys: the
LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS; 144MHz), the
Faint Images of the Radio Sky at Twenty-centimeters (FIRST; 1.4GHz),
the National Radio Astronomy Observatory (NRAO) Very Large Array (VLA)
Sky Survey (NVSS; 1.4GHz), and the VLA Sky Survey (VLASS; 3GHz).
This table contains the radio data of these sources from the various
catalogs used in this paper.
Description:
The table contains information on the 3998 objects studied in the
paper. Depending on the source, this information includes flux
densities, radio luminosities, spectral indices, fractional
variability indices, optical spectral properties, and other relevant
properties of the sample.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 325 3998 Radio data of the sample
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See also:
VIII/111 : VCCS Epoch 1 Bright Catalog Release (Peters+, 2021)
VIII/92 : The FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
J/A+A/622/A1 : LOFAR Two-metre Sky Survey DR1 source catalog (Shimwell+, 2019)
Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- SDSS Object SDSS name (JHHMMSS.ss+DDMMSS.s)
21- 26 F6.4 --- z Redshift
28- 36 F9.5 deg RAdeg Right Ascension (J2000)
38- 46 F9.5 deg DEdeg Declination (J2000)
48- 53 F6.2 mJy/beam E1Peak ? Peak flux density in VLASS Epoch 1
at 3GHz
55- 58 F4.2 mJy/beam e_E1Peak ? Uncertainty in E1peak
60- 66 F7.2 mJy E1Int ? Integrated flux density in VLASS Epoch 1
at 3GHz
68- 71 F4.2 mJy e_E1Int ? Uncertainty in E1Int
73- 78 F6.2 mJy/beam E2Peak ? Peak flux density in VLASS Epoch 2
at 3GHz
80- 83 F4.2 mJy/beam e_E2Peak ? Uncertainty in E2Peak
85- 91 F7.2 mJy E2Int ? Integrated flux density in VLASS Epoch 2
at 3GHz
93- 96 F4.2 mJy e_E2Int ? Uncertainty in E2Int
98-104 F7.2 mJy/beam Fpeak ? Peak flux density in FIRST at 1.4GHz
106-112 F7.2 mJy Fint ? Integrated flux density in FIRST
at 1.4GHz
114-117 F4.2 mJy FIRSTrms ? RMS in FIRST
119-124 F6.1 mJy NInt ? Integrated flux density in NVSS
at 1.4GHz
126-130 F5.1 mJy e_NInt ? Uncertainty in Nint
132-138 F7.2 mJy/beam LPeak ? Peak flux density in LoTSS at 144MHz
140-143 F4.2 mJy/beam e_LPeak ? Uncertainty in Lpeak
145-151 F7.2 mJy LInt ? Integrated flux density in LoTSS
at 144MHz
153-156 F4.2 mJy e_LInt ? Uncertainty in Lint
158-162 F5.2 --- SIVE1FPeak ? Spectral index of VLASS Epoch 1 (3GHz)
versus FIRST (1.4GHz) peak flux density
164-168 F5.2 --- SIVE1FInt ? Spectral index of VLASS Epoch 1 (3GHz)
versus FIRST (1.4GHz) integrated flux
density
170-174 F5.2 --- SIVE2FPeak ? Spectral index of VLASS Epoch 2 (3GHz)
versus FIRST (1.4GHz) peak flux density
176-180 F5.2 --- SIVE2FInt ? Spectral index of VLASS Epoch 2 (3GHz)
versus FIRST (1.4GHz) integrated flux
density
182-186 F5.2 --- SIFLPeak ? Spectral index of FIRST (1.4GHz)
versus LoTSS (144MHz) peak flux density
188-192 F5.2 --- SIFLInt ? Spectral index of FIRST (1.4GHz)
versus LoTSS (144MHz) integrated flux
density
194-198 F5.2 [10-7W] logRLE1Peak ? Logarithmic radio luminosity of
VLASS Epoch 1 (3GHz) peak flux density
200-204 F5.2 [10-7W] logRLE1Int ? Logarithmic radio luminosity of
VLASS Epoch 1 (3GHz) integrated flux
density
206-210 F5.2 [10-7W] logRLE2Peak ? Logarithmic radio luminosity of
VLASS Epoch 2 (3GHz) peak flux density
212-216 F5.2 [10-7W] logRLE2Int ? Logarithmic radio luminosity of
VLASS Epoch 2 (3GHz) integrated flux
density
218-222 F5.2 [10-7W] logRLFPeak ? Logarithmic radio luminosity of
FIRST (1.4GHz) peak flux density
224-228 F5.2 [10-7W] logRLFInt ? Logarithmic radio luminosity of
FIRST (1.4GHz) integrated flux density
230-234 F5.2 [10-7W] logRLLPeak ? Logarithmic radio luminosity of
LoTSS (144MHz) peak flux density
236-240 F5.2 [10-7W] logRLLInt ? Logarithmic radio luminosity of
LoTSS (144MHz) integrated flux density
242-246 F5.2 --- FVVLASSPeak ? Fractional variability in VLASS (3GHz),
peak flux density
248-252 F5.2 --- FVVLASSInt ? Fractional variability in VLASS (3GHz),
integrated flux density
254-257 F4.2 --- CE1 ? Ratio between the peak and integrated
flux density in VLASS Epoch 1 (3GHz)
259-262 F4.2 --- CE2 ? Ratio between the peak and integrated
flux density in VLASS Epoch 2 (3GHz)
264-267 F4.2 --- CF ? Ratio between the peak and
integrated flux density in FIRST (1.4GHz)
269-273 F5.2 [10-7W] logL5100 Logarithmic of the monochromatic
luminosity at 5100Å
275-279 I5 10-20W/m2 FHbb Hβ broad component flux
281-283 I3 10-20W/m2 e_FHbb Uncertainty in FHbb
285-288 I4 km/s FWHMHbb Hβ broad component FWHM
290-292 I3 km/s e_FWHMHbb Uncertainty in FWHMHb
294-296 I3 10-20W/m2 FHbn Hβ narrow component flux
298-300 I3 10-20W/m2 e_FHbn Uncertainty in FHbn
302-305 I4 10-20W/m2 FO3 The [OIII] (5007) flux
307-309 I3 10-20W/m2 e_FO3 Uncertainty in FO3
311-314 F4.2 --- R4570 Optical FeII strength relative to
Hβ broad component
316-319 F4.2 [Msun] logMBH Logarithmic black hole mass
321-325 F5.2 --- EddRatio Eddington ratio
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Acknowledgements:
Irene Varglund, irene.varglund(at)aalto.fi,
Aalto University Metsahovi Radio Observatory
(End) Patricia Vannier [CDS] 01-Oct-2025