J/ApJS/238/37 Opt. & NIR spectral atlas of 16 2MASS NIR-red AGNs (Kim+, 2018)
Medium-resolution optical and near-infrared spectral atlas of 16 2MASS-selected
NIR-red active galactic nuclei at z∼0.3.
Kim D., Im M., Canalizo G., Kim M., Kim Ji H., Woo J.-H., Taak Y.C.,
Kim J.-W., Lazarova M.
<Astrophys. J. Suppl. Ser., 238, 37 (2018)>
=2018ApJS..238...37K 2018ApJS..238...37K
ADC_Keywords: Active gal. nuclei; Spectra, infrared; Spectra, optical;
Redshifts; Magnitudes, absolute
Keywords: galaxies: active ; galaxies: evolution ; galaxies: Seyfert ;
quasars: emission lines ; quasars: general ;
quasars: supermassive black holes
Abstract:
We present medium-resolution spectra (R∼2000-4000) at 0.4-1.0µm and
0.7-2.5µm of 16 active galactic nuclei (AGNs) selected with red
color in the near-infrared (NIR) of J-K>2.0mag at z∼0.3. We fit the
Hβ, Hα, Pβ, and Pα lines from these spectra to
obtain their luminosities and line widths. We derive the E(B-V) color
excess values of the NIR-red AGNs using two methods, one based on the
line-luminosity ratios and another based on the continuum slopes. The
two E(B-V) values agree with each other at rms dispersion ∼0.249.
About half of the NIR-red AGNs have g'-K<5 magnitude, and we find that
these NIR-red, but blue in optical-NIR AGNs, have E(B-V)∼0, suggesting
that a significant fraction of the NIR color-selected red AGNs are
unobscured or only mildly obscured. After correcting for the dust
extinction, we estimate the black hole (BH) masses and the bolometric
luminosities of the NIR-red AGNs using the Paschen lines to calculate
their Eddington ratios (λEdd). The median Eddington ratios of
nine NIR-red AGNs (log(λEdd~-0.654±0.176) are only mildly
higher than those of unobscured type 1 AGNs
(log(λEdd~-0.961±0.008). Moreover, we find that the
MBH-σ* relation for three NIR-red AGNs is consistent with that
of unobscured type 1 AGNs at similar redshift. These results suggest
that the NIR-red color selection alone is not effective at picking up
dusty, intermediate-stage AGNs.
Description:
Our sample is drawn from the 29 2MASS-based red AGNs observed with the
WFPC2 on the Hubble Space Telescope (HST) in Marble+ (2003ApJ...590..707M 2003ApJ...590..707M).
Among the 29 NIR-red AGNs, we select 16 AGNs at z∼0.3 (from 0.139 to
0.411) for which the redshifted Pα or Pβ line is observable
within the sky window wavelength range.
We performed NIR spectroscopic observations with four telescopes and
their respective instruments.
First, NIR spectra of nine NIR-red AGNs were obtained with the
cross-dispersed mode of the Gemini Near-infrared Spectrograph (GNIRS)
on the 8.1m Gemini-North telescope; spectral coverage from ∼1um to
∼2.1um with a spectral resolution of R∼2600.
Second, we used the SpeX on the 3.0m NASA Infrared Telescope Facility
(IRTF) for five NIR-red AGNs; R∼2000 across 0.7-2.55um.
Third, for two NIR-red AGNs, we used the Folded-port Infrared
Echellette (FIRE) on the 6.5m Magellan Baade telescope; 0.82-2.51um
with R∼3600.
Fourth, an NIR spectrum of one NIR-red AGN was obtained with the
Infrared Camera and Spectrograph (IRCS) on the 8.2m Subaru telescope.
See section 2.2 for further explanations.
In addition to the NIR spectra, we obtained optical spectra for 12
NIR-red AGNs. Two (G. Canalizo & M. Lazarova) of us observed 10
NIR-red AGNs using the Echellette Spectrograph and Imager (ESI) on the
Keck II telescope with a spectral wavelength range of 3900Å to
11000Å and a spectral resolution of R∼4000.
For the remaining two NIR-red AGNs, we obtained the optical spectra
from Data Release 12 (DR12) of the Sloan Digital Sky Survey (SDSS;
3800Å to 9200Å, with a spectral resolution of 1500-2500).
See section 2.3.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 137 18 Observing summary
table2.dat 41 28043 NIR spectra
table3.dat 40 41331 Optical spectra
table4.dat 79 16 Line measurements of [OIII], [NII], and [SII] lines
table8.dat 79 16 BH masses, bolometric luminosities, and LEdd
values of NIR-red AGNs
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See also:
III/116 : Spectrophotometric Standards (Massey+ 1988)
II/294 : SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
VII/241 : The 2dF QSO Redshift Survey (Croom+ 2004)
VII/243 : SDSS quasar catalog. III. (Schneider+, 2005)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
VII/248 : Quasars and Active Galactic Nuclei (12th Ed.) (Veron+ 2006)
J/AJ/112/407 : The FIRST bright QSO survey (Gregg+, 1996)
J/AJ/119/2540 : Asiago-ESO/RASS QSO survey. I. (Grazian+, 2000)
J/ApJS/135/227 : The FIRST bright quasar survey. III. (Becker+, 2001)
J/ApJ/569/23 : Optical polarisation of 2MASS QSOs (Smith+, 2002)
J/AJ/126/2209 : X-ray AGN from RASS and SDSS (Anderson+, 2003)
J/ApJ/640/579 : Near-infrared spectra of 27 SDSS quasars (Glikman+, 2006)
J/A+A/451/457 : X-ray properties of AGN in CDFS (Tozzi+, 2006)
J/ApJ/667/673 : FIRST-2MASS red quasar survey (Glikman+, 2007)
J/ApJS/175/116 : SNU bright quasar survey (SNUQSO) (Lee+, 2008)
J/ApJ/698/1095 : The FIRST-2MASS red QSO survey. II. (Urrutia+, 2009)
J/ApJS/183/17 : The SDSS DR5/XMM-Newton quasar survey (Young+, 2009)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/ApJ/757/51 : FIRST-2MASS dust-reddened QSO spectra (Glikman+, 2012)
J/ApJ/772/26 : AGN with WISE. II. The NDWFS Bootes field (Assef+, 2013)
J/ApJS/208/24 : Spitzer MIR AGN survey. I. (Lacy+, 2013)
J/ApJ/806/109 : Rest-frame optical spectra of 3<z<6 QSOs (Jun+, 2015)
J/ApJ/812/66 : NIR spectra of 5 red quasars at 0.5<z<0.9 (Kim+, 2015)
J/ApJS/216/17 : AKARI 2.5-5um spectra of nearby Type-1 AGNs (Kim+, 2015)
J/ApJ/805/96 : SDSS-RM project: velocity dispersions of QSOs (Shen+, 2015)
J/ApJ/815/129 : X-ray AGNs with Subaru/FMOS NIR observations (Suh+, 2015)
J/A+A/610/A31 : 0.8-2.5um spectra of 2 red quasars (Kim+, 2018)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Abbreviated 2MASS name
11- 12 I2 h RAh Hour of right ascension (J2000)
14- 15 I2 min RAm Minute of right ascension (J2000)
17- 20 F4.1 s RAs Second of right ascension (J2000)
22 A1 --- DE- Sign of declination (J2000)
23- 24 I2 deg DEd Degree of declination (J2000)
26- 27 I2 arcmin DEm Arcminute of declination (J2000)
29- 30 I2 arcsec DEs Arcsecond of declination (J2000)
32- 36 F5.3 --- z [0.1/0.5] Redshift
38- 41 F4.1 mag Ksmag [12.7/14.7] 2MASS Ks-band magnitude
43- 47 F5.1 mag KsMag [-29/-26] Ks-band absolute magnitude (1)
49- 54 F6.3 mag E(B-V) [-0.8/1.6]? E(B-V)line value
(column from Table 7)
56- 60 F5.3 mag e_E(B-V) [0.007/0.2]? E(B-V) uncertainty
(column from Table 7)
62- 74 A13 --- Tel NIR spectroscopy Telescope/Instrument name
76- 80 I5 s Exp NIR spectroscopy exposure time
81 A1 --- f_Exp Flag on Exp (2)
83- 90 A8 "Y/M" Date UT date of observation of NIR spectroscopy
92- 99 A8 --- TelOpt Optical spectroscopy Telescope/Instrument name
101-104 I4 s ExpOpt [3600/7200]? Opt. spectroscopy exposure time
106-113 A8 "Y/M" DateOpt UT date of observation of Opt spectroscopy
115-137 A23 --- 2MASS Complete 2MASS name; column added by CDS
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Note (1): The KsMag values are recalculated using the method of
Marble+ (2003ApJ...590..707M 2003ApJ...590..707M) with the standard λCDM
cosmological model of H0=70km/s/Mpc, Ωm=0.3,
and ΩΛ=0.7.
Note (2): Flag as follows:
b = The grism mode observation.
c = The echelle mode observation.
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Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name Abbreviated 2MASS identifier
11 A1 --- f_Name Flag on 2MASS giving the instrument code (1)
13- 19 F7.1 0.1nm lambda [6884.5/25642] Wavelength in Angstroms
21- 30 E10.4 cW/m2/nm Flux [2.3e-18/2.9e-10] Flux density at lambda;
in erg/s/cm2/Å units
32- 41 E10.4 cW/m2/nm e_Flux [2.3e-21/7.9e-11] Uncertaint in Flux
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Note (1): The code differentiates multiple observations of the same source.
Code as follows:
e = Subaru/IRCS echelle mode;
g = Subaru/IRCS grism mode;
G = Gemini/GNIRS;
S = IRTF/SpeX.
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name Abbreviated 2MASS identifier
11- 17 F7.1 0.1nm lambda [3807.5/10699] Wavelength in Angstroms
19- 29 E11.4 cW/m2/nm Flux [-4.2e-16/3.5e-14] Flux density at lambda;
in erg/s/cm2/Å units
31- 40 E10.4 cW/m2/nm e_Flux [7e-21/3.4e-15] Uncertaint in Flux
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Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name Abbreviated 2MASS name
11- 16 F6.2 10+31W LOIII [21/988]? [OIII]λ5007 luminosity;
in 1038erg/s (3)
18- 22 F5.2 10+31W e_LOIII [0.7/42]? LOIII uncertainty
24- 28 F5.1 km/s FWHMOIII [359/989]? [OIII]λ5007 FWHM (3)
30- 33 F4.1 km/s e_FWHMOIII [22/79]? FWHMOIII uncertainty
35- 39 F5.2 10+31W LNII [10.2/85]? [NII]λ6548 luminosity;
in 1038erg/s (3)
41- 44 F4.2 10+31W e_LNII [0.1/1]? LNII uncertainty
46- 50 F5.1 km/s FWHMLNII [301/696]? [NII]λ6548 FWHM (3)
52- 55 F4.1 km/s e_FWHMLNII [5/55]? FWHMLNII uncertainty
57- 62 F6.3 10+31W LSII [4.6/27.3]? [SII]λ6716 luminosity;
in 1038erg/s (3)
64- 68 F5.3 10+31W e_LSII [0.3/1.6]? LSII uncertainty
70- 74 F5.1 km/s FWHMLSII [301/696]? [SII]λ6716 FWHM (3)
76- 79 F4.1 km/s e_FWHMLSII [5/48]? FWHMLSII uncertainty
--------------------------------------------------------------------------------
Note (3): The listed fluxes are not corrected from the dust extinction
caused by their host galaxies.
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name Abbreviated 2MASS name
11- 15 F5.3 [Msun] logMBHb [7.3/9]? Pβ log of BH mass (4)
17- 21 F5.3 [Msun] e_logMBHb [0.009/0.2]? logMBHb uncertainty
23- 27 F5.2 [10-7W] logLbolb [45.3/46.7]? Pβ log of bolometric
luminosity (4)
29- 32 F4.2 [10-7W] e_logLbolb [0.01/0.1]? logLbolb uncertainty
34- 38 F5.3 --- LEddb [0.05/1.6]? Pβ Eddigton ratio
λEdd (4)
40- 44 F5.3 --- e_LEddb [0.002/0.4]? LEddb uncertainty
46- 50 F5.3 [Msun] logMBHa [7.4/9]? Pα log of BH mass (4)
52- 56 F5.3 [Msun] e_logMBHa [0.01/0.05]? logMBHa uncertainty
58- 62 F5.2 [10-7W] logLbola [44.7/46]? Pα log of bolometric
luminosity (4)
64- 67 F4.2 [10-7W] e_logLbola [0.02/0.04]? logLbola uncertainty
69- 73 F5.3 --- LEdda [0.05/0.5]? Pα Eddigton ratio
λEdd (4)
75- 79 F5.3 --- e_LEdda [0.004/0.05]? LEdda uncertainty
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Note (4): The listed properties of NIR-red AGNs are measured after correcting
for the dust extinction using the E(B-V)line values.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 03-Dec-2018