J/ApJ/817/55 NIR spectroscopy of 1.5<z<3.5 broad-band QSOs (Shen, 2016)
Rest-frame optical properties of luminous 1.5<z<3.5 quasars:
the Hβ-[OIII] region.
Shen Y.
<Astrophys. J., 817, 55 (2016)>
=2016ApJ...817...55S 2016ApJ...817...55S (SIMBAD/NED BibCode)
ADC_Keywords: QSOs ; Spectra, infrared ; Redshifts ; Equivalent widths
Keywords: black hole physics; galaxies: active; line: profiles; quasars: general
Abstract:
We study the rest-frame optical properties of 74 luminous
(Lbol=1046.2-48.2erg/s), 1.5<z<3.5 broad-line quasars with near-IR
(JHK) slit spectroscopy. Systemic redshifts based on the peak of the
[OIII]λ5007 line reveal that redshift estimates from the
rest-frame UV broad emission lines (mostly MgII) are intrinsically
uncertain by ∼200km/s (measurement errors accounted for). The overall
full-width-at-half-maximum of the narrow [OIII] line is ∼1000km/s on
average. A significant fraction of the total [OIII] flux (∼40%) is in
a blueshifted wing component with a median velocity offset of
∼700km/s, indicative of ionized outflows within a few kpc from the
nucleus; we do not find evidence of significant [OIII] flux beyond
∼10kpc in our slit spectroscopy. The [OIII] line is noticeably more
asymmetric and weaker than that in typical less luminous low-z
quasars. However, when matched in quasar continuum luminosity, low-z
quasars have similar [OIII] profiles and strengths as these high-z
systems. Therefore the exceptionally large width and blueshifted wing,
and the relatively weak strength of [OIII] in high-z luminous quasars
are mostly a luminosity effect rather than redshift evolution. The
Hβ-[OIII] region of these high-z quasars displays a similar
spectral diversity and Eigenvector 1 correlations with anti-correlated
[OIII] and optical FeII strengths, as seen in low-z quasars; but the
average broad Hβ width is larger by 25% than typical low-z
quasars, indicating more massive black holes in these high-z systems.
These results highlight the importance of understanding [OIII] in the
general context of quasar parameter space in order to understand
quasar feedback in the form of [OIII] outflows. The calibrated
one-dimensional near-IR spectra are made publicly available, along
with a composite spectrum.
Description:
Our sample of quasars with near-IR spectroscopy consists of the 60
quasars at z∼1.5-2.2 from Shen & Liu (2012, J/ApJ/753/125), and 14
additional quasars at z∼3.3 for which we have obtained near-IR
spectroscopy with the Folded-port InfraRed Echellett (FIRE) on the
6.5m Magellan-Baade telescope during two runs in 2013 May and
December.
These quasars were selected from the SDSS DR7 (Abazajian et al. 2009,
II/294) quasar catalog (Shen et al. 2011, J/ApJS/194/45) with good
optical spectra covering the CIV line and in redshift windows of
z∼1.5,2.1,3.3 such that the Hβ-[OIII] region can be covered in
the JHK bands in the near-IR.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 275 74 Spectral measurements
table3.dat 24 7700 Composite spectrum
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See also:
II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
J/MNRAS/452/2553 : Sample of foreground-background QSO pairs (Johnson+, 2015)
J/ApJ/804/L15 : SDSS-DR7 broad-line QSOs (Sun+, 2015)
J/MNRAS/426/2703 : Type 1 AGN at low z. II. (Stern+, 2012)
J/ApJ/753/125 : NIR spectroscopy follow-up of 60 SDSS-DR7 QSOs (Shen+, 2012)
J/MNRAS/423/600 : Type-1 low-z AGN emission properties (Stern+, 2012)
J/ApJ/737/71 : The [OIII] emission line in SDSS AGNs (Zhang+, 2011)
J/ApJ/736/86 : FeII emission in SDSS type 1 AGNs (Dong+, 2011)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010)
J/ApJ/680/169 : SDSS DR5 virial black hole masses (Shen+, 2008)
J/ApJ/666/757 : CIV 1549Å emission line in AGNs (Sulentic+, 2007)
J/A+A/459/55 : Narrow-band imaging of 5 Seyfert-1 galaxies (Bennert+, 2006)
J/A+A/456/953 : Narrow-band imaging of 6 Seyfert-2 galaxies (Bennert+, 2006)
J/AJ/130/381 : Blueshifted [O III] emission (Boroson+, 2005)
J/A+A/309/81 : X-ray properties of AGN (Wang+, 1996)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Name Object name (JHHMM+DDMM)
12- 15 I4 --- Plate Plate number of the SDSS spectrum
17- 19 I3 --- Fiber Fiber ID of the SDSS spectrum
21- 25 I5 d MJD [51612/54567] Modified Julian Date of
the SDSS spectrum
27- 36 F10.6 deg RAdeg Right ascension (J2000)
38- 46 F9.6 deg DEdeg Declination (J2000)
48- 53 F6.4 --- zHW10 [1.49/3.4] Redshift from Hewett & Wild (2010,
J/MNRAS/405/2302)
55- 60 F6.4 --- e_zHW10 [0.001/0.02] zHW10 uncertainty
62- 67 F6.4 --- zSys [1.49/3.41] Systemic redshift
69- 74 F6.4 --- e_zSys [0.0001/0.006] Measurement error in zSys
76- 81 F6.3 [10-7W] logL5100 [45.2/47.3] Continuum luminosity at
rest-frame 5100Å; in erg/s
83- 88 F6.3 [10-7W] e_logL5100 [0/23.2] logL5100 uncertainty
90- 96 F7.1 km/s FWHMHb [2880/13055] FWHM of the
broad Hβ component
98-103 F6.1 km/s e_FWHMHb [46/5265] FWHMHb uncertainty
105-109 F5.1 0.1nm EWHb [12/363] Rest-frame equivalent width of the
broad Hβ component
111-114 F4.1 0.1nm e_EWHb [0.8/97] EWHb uncertainty
116-120 F5.2 [10-7W] logLHb [43.6/45.4] Luminosity of the
broad Hβ component
122-125 F4.2 [10-7W] e_logLHb [0/0.6] logLHB uncertainty
127-131 F5.2 [10-7W] logLnHb [0/44] Luminosity of the
narrow Hβ component (1)
133-137 F5.2 [10-7W] e_logLnHb [0.03/22.1]? logLnHb uncertainty (1)
139-144 F6.2 0.1nm EWOIII [0/115]? Rest-frame equivalent width of
the entire [OIII]λ5007 line (1)
146-151 F6.2 0.1nm e_EWOIII [0/529]? EWOIII uncertainty (1)
153-158 F6.3 [10-7W] logLOIII [0/45.2]? Luminosity of
the entire [OIII]λ5007 line (1)
160-165 F6.3 [10-7W] e_logLOIII [0.002/22]? logLOIII uncertainty (1)
167-171 F5.2 [10-7W] logLOIIIc [0/44.5]? Luminosity of the core
component of [OIII]λ5007 (1)
173-177 F5.2 [10-7W] e_logLOIIIc [0.01/23]? logLOIIIc uncertainty (1)
179-183 F5.2 [10-7W] logLOIIIw [0/45.1]? Luminosity of the wing
component of [OIII]λ5007 (1)
185-189 F5.2 [10-7W] e_logLOIIIw [0.01/22]? logLOIIIw uncertainty (1)
191-197 F7.2 km/s FWHMOIII [0/2156]? FWHM of the
entire [OIII]λ5007 line (1)
199-204 F6.2 km/s e_FWHMOIII [3/949]? FWHMOIII uncertainty (1)
206-212 F7.2 km/s FWHMOIIIc [0/1201]? FWHM of the core component
of [OIII]λ5007 (1)
214-219 F6.2 km/s e_FWHMOIIIc [0/601]? FWHMOIIIc uncertainty (1)
221-227 F7.2 km/s FWHMOIIIw [0/1201]? FWHM of the wing component
of [OIII]λ5007 (1)
229-234 F6.2 km/s e_FWHMOIIIw [0/601]? FWHMOIIIw uncertainty (1)
236-243 F8.2 km/s VOIIIw [-1259/494]? Velocity offset of the wing
component of [OIII]λ5007 from
systemic (negative means blueshift)
245-250 F6.2 km/s e_VOIIIw [0.02/494]? VOIIIw uncertainty
252-257 F6.2 0.1nm EWFe [0/670] Rest-frame equivalent width of the
optical FeII complex within
4434-4684Å (1)
259-264 F6.2 0.1nm e_EWFe [0/218]? EWFe uncertainty (1)
266-270 F5.2 [Msun] logMBH [8.7/10.6] Single-epoch BH mass estimate
based on broad Hβ (Vestergaard
& Peterson 2006ApJ...641..689V 2006ApJ...641..689V)
272-275 F4.2 [Msun] e_logMBH [0.01/5.1] logMBH uncertainty
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Note (1): Some lines have zero fluxes but errors because the errors were
estimated from Monte Carlo realizations of the original spectrum,
which lead to some detections in certain realizations.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 F6.1 0.1nm lambda [800.5/8499.5] Rest wavelength; Angstroms
8- 14 F7.3 --- Flux [1.3/129]?=0 Flux density in arbitrary units
16- 21 F6.3 --- e_Flux [0.02/26]?=0 Uncertainty in Flux
23- 24 I2 --- N [0/74] Number of objects used (1)
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Note (1): To construct the median composite spectrum at each wavelength pixel
from our near-IR quasar sample.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 07-Apr-2016