J/MNRAS/514/3626 MaNGA-DR15 type-1&2 AGN catalogs (Cortes-Suarez+, 2022)
SDSS-IV MaNGA Identification and multiwavelength properties of Type-1 AGN in
the DR15 sample.
Cortes-Suarez E., Negrete C.A., Hernandez-Toledo H.M., Ibarra-Medel H.,
Lacerna I.
<Mon. Not. R. Astron. Soc. 514, 3626-3649 (2022)>
=2022MNRAS.514.3626C 2022MNRAS.514.3626C (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Line Profiles ; Spectroscopy ; Optical ;
Photometry ; Positional data ; Redshifts ; Stars, masses
Keywords: galaxies: active - quasars: emission lines
Abstract:
We present a method to identify type-1 active galactic nuclei (AGNs)
in the central 3 arcsec integrated spectra of galaxies in the MaNGA
DR15 sample. It is based on flux ratios estimates in spectral bands
flanking the expected H α broad component H αBC. The high
signal-to-noise ratio obtained (mean S/N = 84) permits the
identification of H αBC without prior subtraction of the host
galaxy (HG) stellar component. A final sample of 47 type-1 AGN is
reported out of 4700 galaxies at z < 0.15. The results were compared
with those from other methods based on the SDSS DR7 and MaNGA data.
Detection of type-1 AGN in those works compared to our method goes
from 26 per cent to 81 per cent. Spectral indexes were used to
classify the type-1 AGN spectra according to different levels of
AGN-HG contribution, finding 9 AGN-dominated, 14 intermediate, and 24
HG-dominated objects. Complementary data in NIR-MIR allowed us to
identify type I AGN-dominated objects as blue and HG-dominated as red
in the WISE colours. From NVSS and FIRST radio continuum data, we
identify 5 HERGs (high-excitation radio galaxies) and 4 LERGs
(low-excitation radio galaxies), three showing evidence of radio-jets
in the FIRST maps. Additional X-ray data from ROSAT allowed us to
build [O III] and H αBC versus X-ray, NIR-MIR, and radio
continuum diagrams, showing that L(H αBC) and L([O III])
provide good correlations. The range in H αBC luminosity is
wide 38 < logL(H αBC) < 44, with logFWHM(H αBC) ∼ 3-4,
covering a range of Eddington ratios of
-5.15 < log Lbol / LEdd < 0.70. Finally, we also identify and
report ten possible changing-look AGN candidates.
Description:
In this work, we present a method to identify type-1 AGN in the MaNGA
survey by using the integrated spectra of the central 3 arcsec of the
IFS data. It is based on the estimate of two flux ratios placed at the
red and blue positions aside from the expected H α broad
emission line. This is a 'non-invasive' method that avoids the host
galaxy subtraction of the optical spectra and considers only the
prominence of the H α emission line broad component for a given
signal-to-noise ratio (S/N). The method was applied to the MaNGA DR15
(MPL-7) data sample and further tested by using data from the SDSS
DR7, showing comparable results to other methods that identify type-1
AGN in the DR7 catalogues.
We use the MaNGA DR15 IFS survey for 4636 galaxies which is about half
of the total sample. Also we gathered for our final type-1 AGN sample,
multiwavelength information from WISE, FIRST & NVSS and ROSAT
catalogs. With the type-1 selection flux ratio method explicited in
section 3, we obtain 47 confirmed type-1 AGNs representing ∼ 1 per
cent of the MPL-7 galaxies, we present their main physical properties
in table3.dat. As complement, the remaining candidates were considered
as type-2 AGNs since they only show narrow emission lines, thus we
regroup the 236 type-2 AGNs global properties in the tablea1.dat.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 88 47 Physical properties of the 47 type-1 AGN sample
tablea1.dat 75 236 Physical properties of the 236 type-2 AGN sample
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See also:
J/ApJS/234/23 : The WISE AGN candidates catalogs (Assef+, 2018)
J/ApJS/221/12 : AGNs in the MIR using AllWISE data (Secrest+, 2015)
J/ApJ/901/159 : MaNGA AGNs from WISE, Swift/BAT, NVSS & FIRST
(Comerford+, 2020)
J/MNRAS/492/4680 : Ionized gas outflow signatures in MaNGA AGN
(Wylezalek+, 2020)
J/ApJ/804/27 : NIR photometry of hot dust-obscured galaxies (Assef+, 2015)
J/ApJS/243/21 : A complete sample of broad-line AGN from SDSS-DR7
(Liu+, 2019)
J/ApJS/219/1 : Catalog of Type-1 AGNs from SDSS-DR7 (Oh+, 2015)
J/A+A/588/A103 : Second ROSAT all-sky survey (2RXS) source catalog
(Boller+, 2016)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
J/ApJS/98/477 : Optical spectral atlas of Seyfert nuclei (Ho+ 1995)
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- SDSS SDSS identifier designation
(JHHMMSS.ss+DDMMSS.s) (SDSS-ID)
21- 28 A8 --- MaNGAId MaNGA DR15 identifier (MaNGA-ID)
30- 39 A10 --- PlateIFU Plate+ifudesign name from MaNGA-DR15
(Plate-IFU)
41- 48 F8.4 deg RAdeg Right ascension (J2000) (R.A)
50- 56 F7.4 deg DEdeg Declination (J2000) (Dec)
58- 62 F5.2 mag gmag SDSS-DR14 g-band apparent magnitude in
AB system (mg)
64- 68 F5.3 --- z The spectrocopic redshift obtained by the
analysing IFS tool MaNGA Pipe3D (z)
70- 74 F5.2 [Msun] log(M*) Stellar masses from NSA catalog derived
from Sersic fluxes (M*)
76- 80 F5.2 [10-7W] log(LOIII) Logarithm of [O III] lines luminosity
obtained from our emission lines fitting
Cortes-Suarez et al. 2022MNRAS.514.3626C 2022MNRAS.514.3626C
(L[OIII])
82- 86 F5.2 [10-7W] log(LHaBC) Logarithm of Hα broad component
lines luminosity obtained from our
emission lines fitting Cortes-Suarez et
al. 2022MNRAS.514.3626C 2022MNRAS.514.3626C (L[HαBC])
88 I1 --- Group The empirical optical spectral
classification of the type-1 AGN
described in section 5.1 (AGN-group) (1)
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Note (1): As fully detailed in the section 5.1, the 47 type-1 AGNs can be
grouped into three specific regions of the H-Index to Hβ-Index
diagram presented in figure 10 of the section 4 as follows:
1 = AGN dominant are in the extreme region where the
H-Index > -1.0 Å. The spectra of objects in this region show
a Balmer broad emission line having various components, with an
apparent absence of absorption lines, and the continuum dominated
by the AGN power law, 9 objects in our sample
2 = Intermediate a group can be described as in between of the two
other groups extremes, in the region H-Index < -1 Å and
Hβ-Index < 18.7 Å. The spectra of objects in this region
show both the Hα and Hβ broad emission lines, the AGN
power law as well as absorption lines, 14 objects in our sample
3 = Galaxy dominant are located at the other extreme, where
H-Index < -8.0 Å and Hβ-Index < 4.1 Å. The spectra
of objects in this region show only a featureless Hα broad
component with a continuum mostly dominated by the stellar
contribution, 24 objects in our sample
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Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- SDSS SDSS identifier designation
(JHHMMSS.ss+DDMMSS.s) (SDSS-ID)
21- 28 A8 --- MaNGAId MaNGA DR15 identifier (MaNGA-ID)
30- 39 A10 --- PlateIFU Plate+ifudesign name from MaNGA-DR15
(Plate-IFU)
41- 48 F8.4 deg RAdeg Right ascension (J2000) (R.A)
50- 56 F7.4 deg DEdeg Declination (J2000) (Dec)
58- 62 F5.3 --- z The spectrocopic redshift obtained by the
analysing IFS tool MaNGA Pipe3D (z)
64- 69 F6.2 mag gMAG SDSS-DR14 g-band absolute magnitude in
AB sytem (mg)
71- 75 F5.2 [Msun] log(M*) Stellar masses from NSA catalog derived from
Sersic fluxes (M*)
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History:
From electronic version of the journal
(End) Luc Trabelsi [CDS] 10-Apr-2025