J/ApJS/229/39 Narrow line Seyfert 1 galaxies from SDSS-DR12 (Rakshit+, 2017)
A catalog of narrow line Seyfert 1 galaxies from the Sloan Digital Sky Survey
Data Release 12.
Rakshit S., Stalin C.S., Chand H., Zhang X.-G.
<Astrophys. J. Suppl. Ser., 229, 39-39 (2017)>
=2017ApJS..229...39R 2017ApJS..229...39R (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Galaxies, spectra ; Spectroscopy ; Redshifts
Keywords: galaxies: active; galaxies: Seyfert; techniques: imaging spectroscopy
Abstract:
We present a new catalog of narrow-line Seyfert 1 (NLSy1) galaxies
from the Sloan Digital Sky Survey Data Release 12 (SDSS DR12). This
was obtained by a systematic analysis through modeling of the
continuum and emission lines of the spectra of all the 68859 SDSS-DR12
objects that are classified as "QSO" by the SDSS spectroscopic
pipeline with z<0.8 and a median signal-to-noise ratio (S/N)>2/pixel.
This catalog contains a total of 11101 objects, which is about 5 times
larger than the previously known NLSy1 galaxies. Their monochromatic
continuum luminosity at 5100Å is found to be strongly correlated
with Hβ, Hα, and [OIII] emission line luminosities. The
optical FeII strength in NLSy1 galaxies is about two times larger than
the broad-line Seyfert 1 (BLSy1) galaxies. About 5% of the catalog
sources are detected in the FIRST survey. The Eddington ratio
(ξEdd) of NLSy1 galaxies has an average of log(ξEdd) of
-0.34, much higher than -1.03 found for BLSy1 galaxies. Their black
hole masses (MBH) have an average of log(MBH) of 6.9M☉,
which is less than BLSy1 galaxies, which have an average of log(MBH)
of 8.0M☉. The MBH of NLSy1 galaxies is found to be correlated
with their host galaxy velocity dispersion. Our analysis suggests that
geometrical effects playing an important role in defining NLSy1
galaxies and their MBH deficit is perhaps due to their lower
inclination compared to BLSy1 galaxies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 121 11101 Emission line properties of narrow-line Seyfert 1
(NLSy1) galaxies
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See also:
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
J/ApJ/806/109 : Rest-frame optical spectra of 3<z<6 QSOs (Jun+, 2015)
J/MNRAS/438/557 : BLR-less AGNs in Stripe82 (Zhang, 2014)
J/MNRAS/431/836 : Type 1 AGN at low z. III. (Stern+, 2013)
J/AJ/143/83 : Properties of a sample of Seyfert 1 galaxies (Xu+, 2012)
J/ApJS/199/3 : The quasars MMT-BOSS pilot survey (Ross+, 2012)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/ApJ/705/L76 : AGNs with double-peaked [OIII] lines (Wang+, 2009)
J/ApJ/670/92 : New sample of low-mass black holes in AGN (Greene+, 2007)
J/ApJS/166/128 : Narrow line Seyfert 1 galaxies from SDSS-DR3 (Zhou+, 2006)
J/AJ/131/1948 : Narrow line Seyfert 1 galaxies in the FBQS (Whalen+, 2006)
J/AJ/124/3042 : Narrow-line Seyfert 1 gal. from SDSS EDR (Williams+, 2002)
J/A+A/309/81 : X-ray properties of AGN (Wang+, 1996)
http://www.sdss3.org/ : SDSS-III home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Sp-ID SDSS identifier; plate-mjd-fiber
17- 25 F9.5 deg RAdeg Right Ascension in decimal
degrees (J2000)
27- 35 F9.5 deg DEdeg Declination in decimal degrees (J2000)
37- 42 F6.4 --- z [0.009/0.8] Spectroscopic redshift
44- 48 F5.2 [10-7W] logL5100 [41/46] Log nuclear monochromatic
luminosity at 5100Å (in erg/s)
50- 54 I5 10-20W/m2 FHbb [6/19115] Broad Hβ component flux (1)
56- 58 I3 10-20W/m2 e_FHbb Uncertainty in FHbb (1)
60- 63 I4 km/s FWHMHbb [308/2200] Broad Hβ component FWHM
65- 67 I3 km/s e_FWHMHbb Uncertainty in FWHMHbb
69- 72 I4 10-20W/m2 FHbn [0/4255] Narrow Hβ component flux (1)
74- 76 I3 10-20W/m2 e_FHbn [0/808] Uncertainty in FHbn (1)
78- 82 I5 10-20W/m2 FO3 [0/17783] Total (broad+narrow)
[OIII]5007Å flux (1)
84- 86 I3 10-20W/m2 e_FO3 [0/533] Uncertainty in FO3 (1)
88- 91 I4 km/s FWHMO3n [0/1201] Narrow [OIII]5007Å
component FWHM
93- 95 I3 km/s e_FWHMO3n [0/212] Uncertainty in FWHMO3n
97-101 I5 10-20W/m2 FHab [0/60883]? Broad Hα
component flux (1)
103-106 I4 10-20W/m2 e_FHab [0/5906]? Uncertainty in FHab (1)
108-111 I4 km/s FWHMHab [0/4234]? Broad Hα component FWHM
113-116 I4 km/s e_FWHMHab [0/2203]? Uncertainty in FWHMHab
118-121 F4.2 --- R4570 [0/4.6] Optical FeII strength
relative to Hβ broad component
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Note (1): In units of 1e-17erg/s/cm2.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 26-Jun-2017