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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 (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:
FileName Lrecl Records Explanations
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
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
Bytes Format Units Label Explanations
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)
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: table5.dat
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)
Note (1): Radio type according to the RL(0.5) as follows: RL = radio-loud RQ = radio-quiet
Acknowledgements: Sina Chen, sina.chen(at)studenti.unipd.it References: Jones et al., 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
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