J/ApJS/216/17 AKARI 2.5-5um spectra of nearby Type-1 AGNs (Kim+, 2015)
The AKARI 2.5-5.0µm spectral atlas of Type-1 active galactic nuclei:
black hole mass estimator, line ratio, and hot dust temperature.
Kim D., Im M., Kim J.H., Jun H.D., Woo J.-H., Lee H.M., Lee M.G.,
Nakagawa T., Matsuhara H., Wada T., Oyabu S., Takagi T., Ohyama Y.,
Lee S.-K.
<Astrophys. J. Suppl. Ser., 216, 17 (2015)>
=2015ApJS..216...17K 2015ApJS..216...17K
ADC_Keywords: Active gal. nuclei ; Spectra, infrared ; Redshifts
Keywords: galaxies: active; galaxies: nuclei; infrared: galaxies;
quasars: emission lines; quasars: general
Abstract:
We present 2.5-5.0µm spectra of 83 nearby (0.002<z<0.48) and bright
(K<14mag) type-1 active galactic nuclei (AGNs) taken with the Infrared
Camera on board AKARI. The 2.5-5.0µm spectral region contains
emission lines such as Brβ (2.63µm), Brα (4.05µm),
and polycyclic aromatic hydrocarbons (3.3µm), which can be used for
studying the black hole (BH) masses and star formation activity in the
host galaxies of AGNs. The spectral region also suffers less dust
extinction than in the ultra violet (UV) or optical wavelengths, which
may provide an unobscured view of dusty AGNs. Our sample is selected
from bright quasar surveys of Palomar-Green and SNUQSO, and AGNs with
reverberation-mapped BH masses from Peterson et al. Using 11 AGNs with
reliable detection of Brackett lines, we derive the
Brackett-line-based BH mass estimators. We also find that the observed
Brackett line ratios can be explained with the commonly adopted
physical conditions of the broad line region. Moreover, we fit the hot
and warm dust components of the dust torus by adding photometric data
of SDSS, 2MASS, WISE, and ISO to the AKARI spectra, finding hot and
warm dust temperatures of ∼1100K and ∼220K, respectively, rather than
the commonly cited hot dust temperature of 1500K.
Description:
The 2.5-5.0um NIR spectra were obtained with the IRC infrared
spectrograph on the AKARI satellite during phase 3 of the AKARI
operation, i.e., our observation was carried out during 2008-2011
after the helium cooling was over. We used the NG grism mode which
provides a spectral resolution of R=120λ/3.6µm.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 94 83 Nearby AGN list
table5.dat 42 20957 2.5-5um AKARI/IRC spectra
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See also:
II/207 : Palomar-Green catalog UV-excess stellar objects (Green+ 1986)
J/ApJS/214/23 : IR spectra and photometry of z<0.5 quasars (Shi+, 2014)
J/PASJ/65/103 : PAH3.3um/IR luminosity for infrared galaxies (Yamada+, 2013)
J/MNRAS/434/3104 : QSOs SED shapes from optical to NIR (Hao+, 2013)
J/ApJS/207/37 : IR sources spectroscopy in the AKARI NEP (Shim+, 2013)
J/ApJ/761/184 : IR luminosities for dusty AGNs and QSOs (Weedman+, 2012)
J/ApJ/757/51 : FIRST-2MASS dust-reddened QSO spectra (Glikman+, 2012)
J/ApJ/753/125 : NIR spectroscopy follow-up of 60 SDSS-DR7 QSOs (Shen+, 2012)
J/ApJ/753/104 : AGN identifications from AKARI and Swift (Matsuta+, 2012)
J/MNRAS/414/500 : Spitzer/IRS ATLAS project source (Hernan-Caballero+, 2011)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/ApJ/705/14 : Seyfert galaxies in the mid-IR (Deo+, 2009)
J/ApJ/698/1095 : The FIRST-2MASS red QSO survey. II. (Urrutia+, 2009)
J/ApJ/679/140 : IR measurement of quasar obscuration (Treister+, 2008)
J/ApJS/175/116 : SNU bright quasar survey (SNUQSO) (Lee+, 2008)
J/ApJ/670/92 : New sample of low-mass black holes in AGN (Greene+, 2007)
J/ApJ/667/673 : FIRST-2MASS red quasar survey (Glikman+, 2007)
J/ApJ/666/806 : SED of Spitzer quasars (QUEST) (Netzer+, 2007)
J/ApJS/166/470 : SDSS-Spitzer type I QSOs IR photometry (Richards+, 2006)
J/ApJ/640/579 : Near-infrared spectra of 27 SDSS quasars (Glikman+, 2006)
J/ApJ/613/682 : AGN masses & broad-line region sizes (Peterson+, 2004)
J/ApJS/145/199 : Opt. spec. atlas of low-redshift AGN (Marziani+, 2003)
J/ApJS/95/1 : Atlas of Quasar Energy Distributions (Elvis+ 1994)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name Object designation
17- 18 I2 h RAh Hour of right ascension (J2000)
20- 21 I2 min RAm Minute of right ascension (J2000)
23- 26 F4.1 s RAs Second of right ascension (J2000)
28 A1 --- DE- Sign of declination (J2000)
29- 30 I2 deg DEd Degree of declination (J2000)
32- 33 I2 arcmin DEm Arcminute of declination (J2000)
35- 36 I2 arcsec DEs Arcsecond of declination (J2000)
38- 42 F5.3 --- z [0.002/0.5] Redshift
44- 49 F6.3 mag Kmag [8.5/14] K-band magnitude
51- 54 F4.2 [Msun] logMBH [6.2/9.7] Log of Black Hole mass
56 A1 --- n_logMBH [a-e] Method used to estimate logMBH (1)
58- 61 I4 s Texp [396/1848] Exposure time
63- 72 A10 "YYYY-MM-DD" Date1 First date of observation
74- 83 A10 "YYYY-MM-DD" Date2 Second date of observation
85- 94 A10 "YYYY-MM-DD" Date3 Third date of observation
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Note (1): Flag as follows:
a = The MBH values are estimated from the reverberation mapping method
(Peterson et al. 2004, Cat. J/ApJ/613/682).
b = The MBH values are estimated from the reverberation mapping method
(Denney et al. 2010ApJ...721..715D 2010ApJ...721..715D).
c = The MBH values are estimated from the reverberation mapping method
(Grier et al. 2008ApJ...688..837G 2008ApJ...688..837G).
d = The MBH values are based on FWHMHβ and L5100
(Vestergaard & Peterson 2006ApJ...641..689V 2006ApJ...641..689V).
e = The MBH values are based on FWHMHα and LHα
(Lee et al. 2008, J/ApJS/175/116; Im et al. 2007ApJ...664...64I 2007ApJ...664...64I).
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name Object name (1)
17- 21 F5.3 um lambda [1.7/4.97] Wavelength (2.5-5um; except for
composite spectrum: 1.7-5um)
23- 32 E10.4 mW/m2/um Flux [0/27.2]? Flux density; erg/s/cm2/µm
34- 42 E9.3 mW/m2/um e_Flux ? Uncertainty in Flux
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Note (1): The last object is the PG QSO composite spectrum, e.g. "Composite".
Its flux density (erg/s/cm2/Hz) values are not absolute values and
no uncertainty is given.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 13-Feb-2015