J/ApJS/234/16 Hα & Hβ spectral regions of low-z QSOs (Chen+, 2018)
A catalog of quasar properties from the Baryon Oscillation Spectroscopic Survey.
Chen Z.-F., Pan D.-S., Pang T.-T., Huang Y.
<Astrophys. J. Suppl. Ser., 234, 16 (2018)>
=2018ApJS..234...16C 2018ApJS..234...16C
ADC_Keywords: QSOs ; Redshifts ; Spectra, optical ; Equivalent widths
Keywords: black hole physics; catalogs; galaxies: active;
quasars: emission lines; quasars: general
Abstract:
Using the quasars with zem<0.9 from the Baryon Oscillation
Spectroscopic Survey, we measure the spectral characteristics,
including continuum and emission lines, around the Hβ and
Hα spectral regions, which are lacking in Quasar Data Release 12
(DR12Q). We estimate the virial black hole mass from broad Hα
and/or Hβ, and infer quasar redshifts from [OIII]λ5007
emission lines. All the measurements and derived quantities are
publicly available. A comparison between [OIII]λ5007 redshifts
and the visual inspection redshifts included in DR12Q indicates that
the visual inspection redshifts are robust. We find that the full
widths at half maximum of the broad Hα are consistent with those
of the broad Hβ, while both the equivalent widths and line
luminosities of the broad Hα are obviously larger than the
corresponding quantities of the broad Hβ. We also find that there
is an obviously systematic offset between the Hβ and Hα
based mass if they are inferred from the empirical relationships in
the literature. Using our large quasar sample, we have improved the
Hβ and Hα based mass estimators by minimizing the
difference between the Hβ- and Hα-based masses. For the
black hole mass estimator (Equation (1)), we find that the
coefficients (a,b)=(7.00,0.50) for Hα and (a,b)=(6.96,0.50) for
Hβ are the best choices.
Description:
In this paper, we mainly measure the spectral characteristics in the
Hα and Hβ spectral regions for the low-redshift quasars
included in Data Release 12 Quasar Catalog of the SDSS (DR12Q; Paris+
2017, VII/279). The SDSS Baryon Oscillation Spectroscopic Survey (BOSS)
produces spectra in a wavelength range of 3600Å<λ<10400Å
at a resolution of R=1300∼2500.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 243 2860 The catalog including the measurements around
Hα spectral region
table2.dat 202 21107 The catalog including the measurements around
Hβ spectral region
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See also:
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
VII/279 : SDSS quasar catalog: twelfth data release (Paris+, 2017)
J/A+A/417/515 : I Zw 1 unusual emission line spectrum (Veron-Cetty+, 2004)
J/MNRAS/366/480 : Emission-line properties of Seyfert 2 nuclei (Gu+, 2006)
J/MNRAS/397/1713 : SDSS DR3 flat-spectrum radio quasars (Chen+, 2009)
J/ApJ/708/427 : Type 2 AGNs with double-peaked [OIII] lines (Liu+, 2010)
J/ApJ/737/71 : The [OIII] emission line in SDSS AGNs (Zhang+, 2011)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/ApJS/199/3 : The quasars MMT-BOSS pilot survey (Ross+, 2012)
J/MNRAS/452/4153 : SDSS DR12 QSOs [OIII] doublet (Albareti+, 2015)
J/ApJ/817/55 : NIR spectroscopy of 1.5<z<3.5 broad-band QSOs (Shen, 2016)
J/ApJS/228/9 : Physical param. of ∼300000 SDSS-DR12 QSOs (Kozlowski, 2017)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- SDSS SDSS DR12 designation
(HHMMSS.ss+DDMMSS.s; J2000)
20- 34 A15 --- SpID Plate-MJD-fiber ID (G1)
36- 41 F6.4 --- zem [0/0.5] DR12Q redshift from visual inspection
43- 48 F6.4 --- zOIII [0/0.5] Redshift from [OIII]5007Å (G2)
50- 54 F5.2 [10-7W] L5100 [42.2/49.1] Log continuum luminosity
at 5100Å; erg/s (G3)
56- 59 F4.2 [Msun] logM2 [0/9.5] Log black hole mass
from Equation 2 (1)
61- 65 F5.2 [Msun] logM1 [0/10.4] Log black hole mass
from Equation 1 (2)
67- 71 I5 km/s FWHMB [0/19938] Broad Hα FWHM with
single Gaussian (3)
73- 77 I5 km/s FWHMB3 [0/19326] Broad Hα FWHM with
3 Gaussians (3)
79- 83 F5.2 [10-7W] logLHaB [0/44.2] Log broad Hα line luminosity;
erg/s (3)
85- 88 F4.2 [10-7W] e_logLHaB [0/0.4] The 1σ uncertainty in logLHaB
90- 94 F5.1 0.1nm EWHaB [0/797] Equivalent width of broad Hα;
Angstroms (3)
96-100 F5.1 0.1nm e_EWHaB [0/114] The 1σ uncertainty in EWHaB
102-106 F5.2 [10-7W] logLHa+ [0/44.2] Log broad + narrow Hα line
luminosity; erg/s (3)
108-112 F5.2 [10-7W] logLHaN [0/43.2] Log narrow Hα line luminosity;
erg/s (4)
114-117 F4.2 [10-7W] e_logLHaN [0/0.6] The 1σ uncertainty in logLHaN
119-123 F5.1 0.1nm EWHaN [0/401] Equivalent width of narrow Hα;
Angstroms (4)
125-128 F4.1 0.1nm e_EWHaN [0/36] The 1σ uncertainty in EWHaN
130-133 I4 km/s FWHMN [0/1191] FWHM of [NII]6585Å line (5)
135-139 F5.2 [10-7W] logL6585 [0/43] Log [NII]6585Å line luminosity (5)
141-144 F4.2 [10-7W] e_logL6585 [0/0.6] The 1σ uncertainty in logL6585
146-150 F5.1 0.1nm EW6585 [0/173] Equivalent width of [NII]6585Å (5)
152-155 F4.1 0.1nm e_EW6585 [0/26] The 1σ uncertainty in EW6585
157-161 F5.2 [10-7W] logL6549 [0/43] Log [NII]6549Å line luminosity (6)
163-166 F4.2 [10-7W] e_logL6549 [0/4] The 1σ uncertainty in logL6549
168-171 F4.1 0.1nm EW6549 [0/59] Equivalent width of [NII]6549Å (6)
173-176 F4.1 0.1nm e_EW6549 [0/38] The 1σ uncertainty in EW6549
178-182 F5.2 [10-7W] logL6732 [0/42] Log [SII]6732Å line luminosity (7)
184-187 F4.2 [10-7W] e_logL6732 [0/0.6] The 1σ uncertainty in logL6732
189-192 F4.1 0.1nm EW6732 [0/85] Equivalent width of [SII]6732Å (7)
194-197 F4.1 0.1nm e_EW6732 [0/13] The 1σ uncertainty in EW6732
199-203 F5.2 [10-7W] logL6718 [0/42.1] Log [SII]6718Å line
luminosity (8)
205-208 F4.2 [10-7W] e_logL6718 [0/0.6] The 1σ uncertainty in logL6718
210-213 F4.1 0.1nm EW6718 [0/86] Equivalent width of [SII]6718Å (8)
215-218 F4.1 0.1nm e_EW6718 [0/12] The 1σ uncertainty in EW6718
220-225 F6.3 --- chi3 [0.4/25.1] Reduced χ2 of 3 Gaussians
to broad Hα
227-232 F6.3 --- chi [0.5/78] Reduced χ2 of a Gaussian
to broad Hα
234-236 I3 --- ctpix [208/264] Number of good pixels (9)
238-243 F6.3 --- S/N [2/90] Signal-to-Noise (9)
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Note (1): With the FWHM of the broad Hα modeled by a combination of
three Gaussian functions. 0.0 indicates that the broad Hα
has EWHa<3σEWHa.
Note (2): With the (a,b)=(7.00,0.50) and the FWHM of the broad Hβ
modeled by a combination of three Gaussian functions. 0.0 indicates
that the broad Hβ has EWHβ<3σEWHβ.
Note (3): 0.0 indicates that the broad Hα component has
EWHα<3σEWHα.
Note (4): 0.0 indicates that the narrow Hα component has
EWHα<2σEWHα.
Note (5): 0.0 indicates that the [NII]λ6585 has
EW[NII]λ6585<2σEW[NII]λ6585
Note (6): 0.0 indicates that the EW6549<2σEW6549.
Note (7): 0.0 indicates that the EW6732<2σEW6732.
Note (8): 0.0 indicates that the EW6718<2σEW6718.
Note (9): In the Hα spectral region; 6400-6800Å.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- SDSS SDSS DR12 designation
(HHMMSS.ss+DDMMSS.s; J2000)
20- 34 A15 --- SpID Plate-MJD-fiber ID (G1)
36- 41 F6.4 --- zem [0.04/0.9] DR12Q redshift from visual
inspection
43- 48 F6.4 --- zOIII [0/0.9] Redshift from [OIII]5007Å (G2)
50- 54 F5.2 [10-7W] L5100 [42.5/46] Log Continuum luminosity
at 5100Å; erg/s (G3)
56- 59 F4.2 [Msun] logM2 [0/9.7] Log black hole mass
from Equation 2 (1)
61- 64 F4.2 [Msun] logM1 [0/9.7] Log black hole mass
from Equation 1 (2)
66- 70 I5 km/s FWHMB [0/12737] Broad Hβ FWHM with
single Gaussian (3)
72- 76 I5 km/s FWHMB3 [0/12156] Broad Hβ FWHM with
3 Gaussians (3)
78- 82 F5.2 [10-7W] logLHbB [0/45] Log broad Hβ line luminosity;
erg/s (3)
84- 87 F4.2 [10-7W] e_logLHbB [0.02/1] The 1σ uncertainty in logLHbB
89- 93 F5.1 0.1nm EWHbB [0/165] Equivalent width of broad Hβ;
Angstroms (3)
95- 98 F4.1 0.1nm e_EWHbB [0/49] The 1σ uncertainty in EWHbB
100-104 F5.2 [10-7W] logLHb+ [0/44.2] Log broad + narrow Hβ line
luminosity; erg/s (3)
106-110 F5.2 [10-7W] logLHbN [0/43.1] Log narrow Hβ line luminosity;
erg/s
112-115 F4.2 [10-7W] e_logLHbN [0/0.6] The 1σ uncertainty in logLHbN
117-120 F4.1 0.1nm EWHbN [0/98] Equivalent width of narrow Hβ;
Angstroms (4)
122-125 F4.1 0.1nm e_EWHbN [0/20] The 1σ uncertainty in EWHbN
127-130 I4 km/s FWHMN [0/1195] FWHM of [NII]6585Å line (5)
132-136 F5.2 [10-7W] logL5007 [0/44] Log [OIII]5007Å line luminosity
138-141 F4.2 [10-7W] e_logL5007 [0/10] The 1σ uncertainty in logL5007
143-148 F6.1 0.1nm EW5007 [0/1844] Equivalent width of
[OIII]5007Å (5)
150-154 F5.1 0.1nm e_EW5007 [0/103] The 1σ uncertainty in EW5007
156-160 F5.2 [10-7W] logL4959 [0/44] Log [OIII]4959Å line luminosity
162-166 F5.2 [10-7W] e_logL4959 [0/28] The 1σ uncertainty in logL4959
168-172 F5.1 0.1nm EW4959 [0/611] Equivalent width of
[OIII]4959Å (5)
174-177 F4.1 0.1nm e_EW4959 [0/88] The 1σ uncertainty in EW4959
179-184 F6.3 --- chi3 [0.5/20] Reduced χ2 of 3 Gaussians
to broad Hβ
186-191 F6.3 --- chi [0.5/61] Reduced χ2 of a Gaussian
to broad Hβ
193-195 I3 --- ctpix [267/355] Number of good pixels (6)
197-202 F6.3 --- S/N [2/96] Signal-to-Noise (6)
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Note (1): With the (a,b)=(6.91,0.50) and the FWHM of the broad Hβ
modeled by a combination of three Gaussian functions. 0.0 indicates
that the broad Hβ has EWHb< 3σEWHb.
Note (2): With the (a,b)=(6.96,0.50) and the FWHM of the broad Hβ
modeled by a combination of three Gaussian functions. 0.0 indicates
that the broad Hβ has EWHβ< 3σEWHβ.
Note (3): 0.0 indicates that the broad Hβ component has
EWHβ<3σEWHβ.
Note (4): 0.0 indicates that the broad Hβ component has
EWHβ<2σEWHβ.
Note (5): Which are the sum of the core and wing components. 0.0 indicates
that the EW5007<2σEW5007.
Note (6): In the Hβ spectral region; 4700-5100Å.
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Global notes:
Note (G1): Spectroscopic plate number, Modified Julian Date (MJD),
and spectroscopic fiber number:
Note (G2): 0.0 indicates that the EW[OIII]5007<2σEW[OIII]5007.
Note (G3): Directly determined from the fitting power-law.
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History:
From electronic version of the journal
Note: 5 identifiers in table 2 have been corrected by CDS:
23108.71+261109.5 => 231008.70+261109.5;
01424.24+305214.4 => 014204.23+305214.4;
11313.15+215926.1 => 113103.14+215926.1;
15161.92+000507.6 => 151601.92+000507.6 and
224412.32+2401100 => 224412.32+240110.0
References:
Chen et al. Paper I. 2018ApJS..234...16C 2018ApJS..234...16C This catalog
Chen et al. Paper II. 2019ApJS..244...36C 2019ApJS..244...36C Cat. J/ApJS/244/36
Huang et al. Paper III. 2023ApJS..264...52H 2023ApJS..264...52H Cat. J/ApJS/264/52
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 15-Mar-2018