J/A+A/615/A167 Catalog of NLS1s galaxies in 6dFGS survey (Chen+, 2018)
Probing narrow-line Seyfert 1 galaxies in the southern hemisphere.
Chen S., Berton M., La Mura G., Congiu E., Cracco V., Foschini L., Fan J.H.,
Ciroi S., Rafanelli P., Bastieri D.
<Astron. Astrophys. 615, A167 (2018)>
=2018A&A...615A.167C 2018A&A...615A.167C (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Galaxy catalogs ; Galaxies, Seyfert ; Redshifts ;
Radio sources
Keywords: galaxies: active - galaxies: nuclei - galaxies: Seyfert -
quasars: emission lines - quasars: supermassive black holes
Abstract:
We present a new accurate catalog of narrow-line Seyfert 1 galaxies
(NLS1s) in the southern hemisphere from the Six-degree Field Galaxy
Survey (6dFGS) final data release, which is currently the most
extensive spectroscopic survey available in the southern sky whose
database has not yet been systematically explored. We classified 167
sources as NLS1s based on their optical spectral properties. We
derived flux-calibrated spectra for the first time that the 6dFGS does
not provide. By analyzing these spectra, we obtained strong
correlations between the monochromatic luminosity at 5100 Angstrom and
the luminosities of H-beta and [OIII] lines. The central black hole
mass and the Eddington ratio have average values of 0.86x107M☉
and 0.96LEdd respectively, which are typical values for NLS1s. In
the sample, 23 (13.8%) NLS1s were detected at radio frequencies, and
12 (7.0%) of them are radio-loud. Our results confirmed that
radio-loud sources tend to have higher redshift, a more massive black
hole, and higher radio and optical luminosities than radio-quiet
sources.
Description:
The spectral data of the NLS1 sample are derived from the 6dFGS, which
is a combined redshift and peculiar velocity survey over the entire
southern sky with |b|>10°. Optical spectra were obtained through
separate V and R gratings and later spliced to produce combined
spectra spanning 4000Å-7500Å.
We obtained a new sample of 167 NLS1s in the southern hemisphere. The
object's name, coordinates, redshift, and luminosity distance are
reported in Table 1; FWHM and flux of Hβ and [OIII] lines are
listed in Table 2.
The luminosity at 5100Å, and the luminosities of Hβ and [OIII]
lines for the 6dFGS NLS1 sample are reported in Table 4.
With the aim of looking for radio sources in the 6dFGS sample, we
subsequently cross-matched these 167 NLS1s with several important
radio surveys covering the southern hemisphere.
We found 18 sources only detected by the NVSS, three sources only
detected by the SUMSS, one source detected by both the NVSS and the
SUMSS, and one source detected by both the SUMSS and the AT20G. In
total 23 (13.8%) sources have associated radio counterparts. The flux
densities detected by the radio surveys for these 23 sources are
listed in Table 5.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 83 167 Name, coordinates, redshift, luminosity distance,
magnitude on B-band, and mean flux density at
5100 Angstroem in the 6dFGS NLS1 sample
table2.dat 91 167 Name, FWHM and flux of Hbeta and [OIII] lines
and their flux ratio in the 6dFGS NLS1 sample
table4.dat 87 167 Name, luminosity at 5100 Angstrom, luminosities
of Hbeta and [OIII] lines, mass of central black
hole, and Eddington ratio in the 6dFGS NLS1 sample
table5.dat 128 23 Name, flux densities and luminosities on radio
and optical bands, radio loudness, and
radio type in the radio sample
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See also:
VII/259 : 6dF galaxy survey final redshift release (Jones+, 2009)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VIII/81 : Sydney University Molonglo Sky Survey (SUMSS V2.1)
(Mauch+ 2008)
J/MNRAS/375/931 : Radio sources in the 6dFGS (Mauch+, 2007)
J/MNRAS/401/1151 : RASS-6dFGS catalogue (Mahony+, 2010)
J/MNRAS/402/2403 : Australia Telescope 20GHz Survey Catalog, AT20G
(Murphy+, 2010)
J/MNRAS/445/2677 : Peculiar velocities in 6dFGS (Springob+, 2014)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [6dFGS]
7- 23 A17 --- 6dFGS Name in the 6dFGS, gJHHMMSS.s+DDMMSS
25- 26 I2 h RAh Right ascension (J2000)
28- 29 I2 min RAm Right ascension (J2000)
31- 35 F5.2 s RAs Right ascension (J2000)
37 A1 --- DE- Declination sign (J2000)
38- 39 I2 deg DEd Declination (J2000)
41- 42 I2 arcmin DEm Declination (J2000)
44- 47 F4.1 arcsec DEs Declination (J2000)
49- 54 F6.4 --- z Redshift
56- 62 F7.2 Mpc DL Luminosity distance
64- 69 F6.3 mag Bmag Magnitude on B-band
71- 77 F7.2 10-19W/m2/nm F5100 Mean flux density at 5100 Angstroem
(in 10-17erg/s/cm2/Å unit)
79- 83 F5.2 10-19W/m2/nm e_F5100 Mean flux density at 5100 Angstroem
(in 10-17erg/s/cm2/Å unit)
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [6dFGS]
7- 23 A17 --- 6dFGS Name in the 6dFGS, gJHHMMSS.s+DDMMSS
25- 30 F6.1 km/s FWHMHb FWHM of Hbeta line fitted with three Gaussians
32- 36 F5.1 km/s e_FWHMHb FWHM of Hbeta line fitted with three Gaussians
38- 43 F6.1 km/s FWHMO FWHM of [OIII] line fitted with two Gaussians
45- 49 F5.1 km/s e_FWHMO FWHM of [OIII] line fitted with two Gaussians
51- 58 F8.2 10-20W/m2 FHb Flux of Hbeta line
(in 10-17erg/s/cm2 unit)
60- 65 F6.2 10-20W/m2 e_FHb Flux of Hbeta line
(in 10-17erg/s/cm2 unit)
67- 74 F8.2 10-20W/m2 FO Flux of [OIII] line
(in 10-17erg/s/cm2 unit)
76- 81 F6.2 10-20W/m2 e_FO Flux of [OIII] line
(in 10-17erg/s/cm2 unit)
83- 86 F4.2 --- FO/FHb Flux ratio of [OIII]/Hbeta
88- 91 F4.2 --- e_FO/FHb Flux ratio of [OIII]/Hbeta
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [6dFGS]
7- 23 A17 --- 6dFGS Name in the 6dFGS, gJHHMMSS.s+DDMMSS
25- 30 F6.2 10+34W L5100 Luminosity at 5100 Angstroem
(in 1043erg/s unit)
32- 36 F5.2 10+34W e_L5100 rms uncertainty on luminosity at 5100 Angstroem
(in 1043erg/s unit)
38- 45 F8.2 10+34W LHb Luminosity of Hbeta line
(in 1043erg/s unit)
47- 51 F5.2 10+34W e_LHb rms uncertainty on luminosity of Hbeta line
(in 1043erg/s unit)
53- 59 F7.2 10+34W LO Luminosity of [OIII] line
(in 1043erg/s unit)
61- 65 F5.2 10+34W e_LO rms uncertainty on luminosity of [OIII] line
(in 1043erg/s unit)
67- 71 F5.2 10+6Msun MBH Mass of central black hole
73- 77 F5.2 10+6Msun e_MBH rms uncertainty on mass of central black hole
79- 82 F4.2 --- Edd Eddington ratio
84- 87 F4.2 --- e_Edd rms uncertainty on Eddington ratio
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- --- [6dFGS]
7- 23 A17 --- 6dFGS Name in the 6dFGS, gJHHMMSS.s+DDMMSS
25- 29 F5.1 mJy S0.8 ?=- Flux density detected by the
SUMSS at 843MHz
31- 34 F4.1 mJy e_S0.8 ?=- rms uncertainty on S0.8
36- 39 F4.1 mJy S1.4 ?=- Flux density detected by the
NVSS at 1.4GHz
41- 43 F3.1 mJy e_S1.4 ?=- rms uncertainty on S1.4
45- 47 I3 mJy S5 ?=- Flux densities detected by the
AT20G at 5GHz
49- 50 I2 mJy e_S5 ?=- rms uncertainty on S5
52- 54 I3 mJy S8.4 ?=- Flux densities detected by the
AT20G at 8.4GHz
56 I1 mJy e_S8.4 ?=- rms uncertainty on S8.4
58- 60 I3 mJy S22 ?=- Flux densities detected by the
AT20G at 22GHz
62 I1 mJy e_S22 ?=- rms uncertainty on S22
64- 70 F7.2 10-19W/m2/nm F4400 Optical flux density on B-band
(in 10-17erg/s/cm2/Å unit)
72- 77 F6.2 10-19W/m2/nm e_F4400 rms uncertainty on F4400
(in 10-17erg/s/cm2/Å unit)
79- 86 F8.2 10+31W LRadio Radio luminosity at 5GHz
(in 10+38erg/s unit)
88- 94 F7.2 10+31W e_LRadio rms uncertainty on LRadio
(in 10+38erg/s unit)
96-101 F6.2 10+34W L4400 Optical luminosity on B-band
(in 10+43erg/s unit)
103-107 F5.2 10+34W e_L4400 rms uncertainty on L4400
(in 10+43erg/s unit)
109-113 F5.1 --- RL(0) Radio-loudness assuming
a spectral index of alpha=0
115-119 F5.1 --- RL(0.5) Radio-loudness assuming
a spectral index of alpha=0.5
121-125 F5.1 --- RL(1) Radio-loudness assuming
a spectral index of alpha=1
127-128 A2 --- Type Radio type according to the RL(0.5) (1)
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Note (1): Radio type according to the RL(0.5) as follows:
RL = radio-loud
RQ = radio-quiet
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Acknowledgements:
Sina Chen, sina.chen(at)studenti.unipd.it
References:
Jones et al., 2009MNRAS.399..683J 2009MNRAS.399..683J, Cat. VII/259
The 6dF Galaxy Survey: final redshift release (DR3) and southern
large-scale structures
(End) Sina Chen [Univer. of Padova, Italy], Patricia Vannier [CDS] 28-Jun-2018