J/ApJS/235/40 Low-mass black holes in Sy1 galaxies. II. SDSS-DR7 (Liu+, 2018)
A uniformly selected sample of low-mass black holes in Seyfert 1 galaxies.
II. The SDSS DR7 Sample.
Liu H.-Y., Yuan W., Dong X.-B., Zhou H., Liu W.-J.
<Astrophys. J. Suppl. Ser., 235, 40 (2018)>
=2018ApJS..235...40L 2018ApJS..235...40L
ADC_Keywords: Active gal. nuclei; Spectroscopy; Photometry, SDSS; Redshifts;
X-ray sources; Radio sources
Keywords: galaxies: active ; galaxies: nuclei ; galaxies: Seyfert
Abstract:
A new sample of 204 low-mass black holes (LMBHs) in active galactic
nuclei (AGNs) is presented with black hole masses in the range of
(1-20)x105M☉. The AGNs are selected through a systematic
search among galaxies in the Seventh Data Release (DR7) of the Sloan
Digital Sky Survey (SDSS), and careful analyses of their optical
spectra and precise measurement of spectral parameters. Combining them
with our previous sample selected from SDSS DR4 makes it the largest
LMBH sample so far, totaling over 500 objects. Some of the statistical
properties of the combined LMBH AGN sample are briefly discussed in
the context of exploring the low-mass end of the AGN population. Their
X-ray luminosities follow the extension of the previously known
correlation with the [OIII] luminosity. The effective optical-to-X-ray
spectral indices αOX, albeit with a large scatter, are broadly
consistent with the extension of the relation with the near-UV
luminosity L2500Å. Interestingly, a correlation of αOX
with black hole mass is also found, with αOX being statistically
flatter (stronger X-ray relative to optical) for lower black hole
masses. Only 26 objects, mostly radio loud, were detected in radio at
20cm in the FIRST survey, giving a radio-loud fraction of 4%. The host
galaxies of LMBHs have stellar masses in the range of
108.8-1012.4M☉ and optical colors typical of Sbc spirals.
They are dominated by young stellar populations that seem to have
undergone continuous star formation history.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 47 204 The SDSS DR7 low-mass black hole (LMBH) sample
table2.dat 113 204 Emission-line measurements
table3.dat 56 204 Luminosity, mass and Eddington ratio measurements
table4.dat 92 102 ROSAT detections
table5.dat 52 26 FIRST detections
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See also:
VIII/59 : the FIRST Survey, version 1999Jul (White+ 1999)
IX/30 : Second ROSAT PSPC Catalog (ROSAT, 2000)
II/267 : The SDSS Photometric Catalog, DR (Adelman-McCarthy+, 2006)
II/294 : The SDSS Photometric Catalog, DR7 (Adelman-McCarthy+, 2009)
II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
VIII/92 : The FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015)
J/ApJS/112/315 : Spectroscopic parameters of Seyfert nuclei (Ho+ 1997)
J/ApJS/111/377 : Hγ & Hδ absorption features (Worthey+ 1997)
J/A+A/330/108 : ROSAT detected quasars. II. (Yuan+ 1998)
J/A+A/417/515 : I Zw 1 unusual emission line spectrum (Veron-Cetty+, 2004)
J/ApJ/632/799 : NGC4395 light curves (Peterson+, 2005)
J/ApJ/641/L21 : BH mass and velocity dispersion relation (Greene+, 2006)
J/ApJS/166/128 : Narrow line Seyfert 1 galaxies from SDSS-DR3 (Zhou+, 2006)
J/ApJ/670/92 : New sample of low-mass black holes in AGN (Greene+, 2007)
J/ApJ/667/131 : Mass function of active black holes (Greene+, 2007)
J/MNRAS/383/581 : Broad-line Balmer decrements in blue AGN (Dong+, 2008)
J/ApJ/736/86 : FeII emission in SDSS type 1 AGNs (Dong+, 2011)
J/ApJ/742/68 : HST observations of low-mass BH host galaxies (Jiang+, 2011)
J/ApJ/755/167 : Low-mass black holes in SDSS Seyfert 1 galaxies (Dong+, 2012)
J/A+A/542/A83 : CAIXA. II. AGNs from excess variance analysis (Ponti+, 2012)
J/ApJS/201/10 : SDSS quasar catalog with Swift observations (Wu+, 2012)
J/ApJ/768/37 : Radio emission from SDSS quasars (Condon+, 2013)
J/ApJ/775/116 : z<0.06 active BH galaxies from SDSS-DR8 (Reines+, 2013)
J/A+A/588/A103 : 2nd ROSAT all-sky survey (2RXS) source cat. (Boller+, 2016)
J/ApJ/831/168 : 6GHz JVLA obs. of low-z SDSS quasars (Kellermann+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [1/204] Running sequence number
6- 24 A19 --- SDSS Official SDSS name (JHHMMSS.ss+DDMMSS.s)
26- 31 F6.4 --- zspec [0.01/0.3] SDSS spectroscopic redshift
33- 37 F5.2 mag gmag [13.9/21] SDSS Petrosian g magnitude,
uncorrected for Galactic extinction
39- 42 F4.2 mag g-r [0.1/1.1] SDSS Petrosian g-r color index
44- 47 F4.2 mag Ag [0.03/1.2] Galactic extinction in the g band,
Schlegel+ (1998ApJ...500..525S 1998ApJ...500..525S)
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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- 4 I4 --- Seq [1/204] Running sequence number
6- 6 A1 --- l_OII3727 Upper limit flag for OII3727 (1)
8- 13 F6.2 [mW/m2] OII3727 [-16.3/-14.2]? log of emission-line flux,
[OII]3727Å (1)
15- 15 A1 --- l_FEII4570 Upper limit flag for FEII4570 (1)
17- 22 F6.2 [mW/m2] FEII4570 [-16.2/-13.2]? log of emission-line flux,
[FeII]4570Å (1)
24- 24 A1 --- l_NHB Upper limit flag for NHB (1)
26- 31 F6.2 [mW/m2] NHB [-16.2/-14.5]? log of emission-line flux,
Hβ narrow component (1)
33- 33 A1 --- l_BHB Upper limit flag for BHB (1)
35- 40 F6.2 [mW/m2] BHB [-15.8/-14]? log of emission-line flux,
Hβ broad component (1)
42- 47 F6.2 [mW/m2] OIII5007 [-17/-13.6]? log of emission-line flux,
[OIII]5007Å (1)
49- 49 A1 --- l_OI6300 Upper limit flag for OI6300 (1)
51- 56 F6.2 [mW/m2] OI6300 [-17/-14.8]? log of emission-line flux,
[OI]6300Å (1)
58- 58 A1 --- l_NHA Upper limit flag for NHA (1)
60- 65 F6.2 [mW/m2] NHA [-16.1/-13.8]? log of emission-line flux,
Hα narrow component (1)
67- 72 F6.2 [mW/m2] BHA [-15.1/-13.2]? log of emission-line flux,
Hα broad component (1)
74- 74 A1 --- l_NII6583 Upper limit flag for NII6583 (1)
76- 81 F6.2 [mW/m2] NII6583 [-16.8/-14.1]? log of emission-line flux,
[NII]6583Å (1)
83- 83 A1 --- l_SII6716 Upper limit flag for SII6716 (1)
85- 90 F6.2 [mW/m2] SII6716 [-16.8/-11.1]? log of emission-line flux,
[SII]6716Å (1)
92- 92 A1 --- l_SII6731 Upper limit flag for SII6731 (1)
94- 99 F6.2 [mW/m2] SII6731 [-16.8/-14.5]? log of emission-line flux,
[SII]6731Å (1)
101-104 I4 km/s FWHM(BHA) [506/2222]? Line width (FWHM), Hα,
broad component (2)
106-108 I3 km/s FWHM(OIII) [170/838]? Line width (FWHM),
[OIII]5007Å (2)
110-113 I4 km/s FWHM(SII) [78/509]? Line width (FWHM),
[SII]6716Å (2)
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Note (1): Emission-line fluxes (or 3σ upper limits) in log-scale, in
units of erg/s/cm2. The measured emission-line fluxes are regarded to be
reliable detections if they have significance greater than 3σ, or else
the 3σ values will be adopted as the upper limits. Note that these
are observed values only corrected Galactic extinction, and no NLR or BLR
extinction correction has been applied.
Note (2): Line widths (FWHM) that are calculated from the best-fit models and
have been corrected for instrumental broadening using the values measured
from arc spectra and tabulated by the SDSS; in units of km/s.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [1/204] Running sequence number
6- 11 F6.2 mag Mg(tot) [-22.3/-17.3] Total g-band absolute magnitude
13- 18 F6.2 mag Mg(AGN) [-20.2/-14.1] AGN g-band absolute magnitude (3)
20- 25 F6.2 mag Mg(host) [-22.2/-16.7] Host galaxy g-band absolute
magnitude (4)
27- 31 F5.2 10-7W LBHA [39.3/42.2] Luminosity of broad Hα; erg/s
33- 37 F5.2 10-7W LOIII5007 [38.6/42.2] Luminosity of [OIII]5007Å; erg/s
39- 42 F4.2 Msun MBH [5/6.3] BH Virial mass estimate (5)
44- 48 F5.2 --- Redd [-1.9/0.4] Eddington ratio
50- 54 F5.2 Msun M* [9/11.6]? Stellar mass of the host galaxy
56- 56 A1 --- f_M* Note (6)
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Note (3): AGN g-band absolute magnitude, estimated from the LHαB given
in column "LBHA" and a conversion from LHα to Mg assuming
fλ∝λ-1.56.
Note (4): Host galaxy g-band absolute magnitude obtained by subtracting the
AGN luminosity from the total luminosity.
Note (5): Virial mass estimate of the BH calculating following Greene & Ho
(2007, J/ApJ/670/92) and Dong+ (2012, J/ApJ/755/167), in solar units.
Note (6): Note as follows:
a = Estimated using the color-M*/L relation in
Into & Portinari (2013MNRAS.430.2715I 2013MNRAS.430.2715I) where color is the SDSS r-i, and
L is the luminosity of 2MASS Ks band.
b = Estimated using the method similar to that in note a, but using
UKIDSS K-band magnitude.
c = Derived from the MPA-JHU catalog.
d = Estimated using the scaling relation between the WISE 3.4um luminosity
and stellar mass provided by Wen+ (2013MNRAS.433.2946W 2013MNRAS.433.2946W) which is
calibrated using the stellar masses from the MPA-JHU catalog.
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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- 1 I1 --- Set [0/1] Sample (G1)
3- 5 I3 --- Seq2 [6/301] Identification number (G1)
7- 11 F5.3 ct/s cts [0.002/0.9] ROSAT count rate
13- 17 F5.3 ct/s e_cts [0/0.04] Uncertainty in cts
19- 22 F4.2 10+20cm-2 NH [0.7/8.1] Galactic column density
24- 27 F4.2 --- Gamma [1.2/4]? Photon index of X-ray spectrum
29- 32 F4.2 --- E_Gamma [0.05/1.5]? Upper or
symmetric uncertainty in Gamma
34- 37 F4.2 --- e_Gamma [0.06/1.4]? Lower uncertainty in Gamma
39- 44 F6.2 [mW/m2] Fx [-13.8/-11.5] log of 0.5-2keV X-ray flux
46- 49 F4.2 [mW/m2] e_Fx [0/0.2] Uncertainty in Fx
51- 55 F5.2 [10-7W] Lx [39.9/44.1] log of 0.5-2keV X-ray
luminosity
57- 60 F4.2 [10-7W] e_Lx [0/0.2] Uncertainty in Lx
62- 66 F5.2 10-7W/Hz L2500 [25.45/28.85] Monochromatic luminosity
at 2500Å; in erg/s/Hz units
68- 72 F5.2 --- alphaOX [-1.6/-0.7] Optical-to-X-ray effective
spectral index
74- 92 A19 --- SDSS SDSS name (JHHMMSS.ss+DDMMSS.s);
column added by CDS
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 1 I1 --- Set [0/1] Sample (G1)
3- 5 I3 --- Seq2 [22/305] Identification number (G1)
7- 11 F5.2 mJy S20cm [0.6/16.8] Flux density at 20cm from FIRST
13- 16 F4.2 mJy e_S20cm [0.1/0.9] Uncertainty in S20cm (1)
18- 22 F5.2 W/Hz logP20cm [21.3/23.6] Radio power (W/Hz) at 20cm
24- 27 F4.2 W/Hz e_logP20cm [0.02/0.09] Uncertainty in logP20cm
29- 32 F4.2 [-] logR [0.8/2.5] Radio loudness in logscale (2)
34- 52 A19 --- SDSS SDSS name (JHHMMSS.ss+DDMMSS.s);
column added by CDS
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Note (1): Uncertainties include the 5% systematic uncertainty recommended by
White+ (1997ApJ...475..479W 1997ApJ...475..479W ; see Cat. VIII/92).
Note (2): Radio loudness in logscale. R=f6cm/f4400Å, assuming a spectral
index of αR=0.46 (radio; Ulvestad & Ho 2001ApJ...558..561U 2001ApJ...558..561U) and
αO=0.44 (optical; Vanden Berk+ 2001AJ....122..549V 2001AJ....122..549V),
where fν~ν-αO.
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Global notes:
Note (G1): Samples from:
0 = This paper (Seq2 = Seq from this paper); or
1 = Dong+ (2012, J/ApJ/755/167 ; Seq2 = Seq from Dong).
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History:
From electronic version of the journal
References:
Dong et al. Paper I. 2012ApJ...755..167D 2012ApJ...755..167D Cat. J/ApJ/755/167
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 27-Aug-2018