J/MNRAS/494/1784 Local AGN survey (LASr) I (Asmus+, 2020)
Local AGN survey (LASr): I.
Galaxy sample, infrared colour selection, and predictions for AGN within 100Mpc.
Asmus D., Greenwell C.L., Gandhi P., Boorman P.G., Aird J., Alexander D.M.,
Assef R.J., Baldi R.D., Davies R.I., Honig S.F., Ricci C., Rosario D.J.,
Salvato M., Shankar F., Stern D.
<Mon. Not. R. Astron. Soc., 494, 1784-1816 (2020)>
=2020MNRAS.494.1784A 2020MNRAS.494.1784A (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Galaxies, Seyfert ; Photometry, infrared ;
Redshifts ; X-ray sources
Keywords: galaxies: active - galaxies: Seyfert - infrared: galaxies -
X-rays: galaxies
Abstract:
To answer major questions on supermassive black hole (SMBH) and galaxy
evolution, a complete census of SMBH growth, i.e. active galactic
nuclei (AGN), is required. Thanks to all-sky surveys by the Wide-field
Infrared Survey Explorer (WISE) and the Spectrum-Roentgen-Gamma (SRG)
missions, this task is now feasible in the nearby Universe. We present
a new survey, the Local AGN Survey (LASr), with the goal of
identifying AGN unbiased against obscuration and determining the
intrinsic Compton-thick (CT) fraction. We construct the most complete
all-sky galaxy sample within 100Mpc (90 per cent completeness for
log(M*/M☉)∼9.4), four times deeper than the current reference,
the Two Micron All-Sky Survey Redshift Survey (2MRS), which misses ∼20
per cent of known luminous AGN. These 49k galaxies serve as parent
sample for LASr, called LASr-GPS. It contains 4.3k already known AGN,
≥82 per cent of these are estimated to have
Lnuc(12µm)<1042.3erg/s, i.e. are low-luminosity AGN. As a first
method for identifying Seyfert-like AGN, we use WISE-based infrared
colours, finding 221 galaxies at Lnuc(12µm)≥1042.3erg/s to
host an AGN at 90 per cent reliability. This includes 61 new AGN
candidates and implies an optical type 2 fraction of 50-71 per cent.
We quantify the efficiency of this technique and estimate the total
number of AGN with Lint(2-10keV)≥1042erg/s in the volume to be
362+145-116 (8.6+3.5-2.8x10-5Mpc-3). X-ray brightness
estimates indicate the CT fraction to be 40-55 per cent to explain the
Swift non-detections of the infrared selected objects. One third of
the AGN within 100 Mpc remain to be identified, and we discuss the
prospects for the eROSITA all-sky survey to detect them.
Description:
In order to build our parent sample of galaxies for the Local AGN
Survey (LASr), we combine the 2MASS Redshift Survey (2MRS; Huchra et
al. 2012ApJS..199...26H 2012ApJS..199...26H, Cat. J/ApJS/199/26) with galaxies from the
major public astronomical data bases. Namely, the LASr-GPS is created
by querying the 2018 December release of the NASA/IPAC Extragalactic
Database (NED), the 2018 May release of the Centre de Donnees
astronomiques de Strasbourg (CDS) Set of Identifications,
Measurements, and Bibliography for Astronomical Data (SIMBAD; Wenger
et al. 2000A&AS..143....9W 2000A&AS..143....9W), and the most recent, i.e. 15th, data
release of the Sloan Digital Sky Survey (SDSS; Blanton et al.
2017AJ....154...28B 2017AJ....154...28B; Aguado et al. 2019ApJS..240...23A 2019ApJS..240...23A) for all
objects within the redshift limit.
A multistage cleaning process is necessary with iterations before and
after merging of these different subsets to remove duplications,
spurious redshifts, and other contaminants in order to obtain a clean
galaxy sample.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 280 49546 LASr-GPS
table2.dat 299 172 Known AGN selected by R90
table3.dat 239 159 R90 AGN candidates
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See also:
J/ApJS/199/26 : The 2MASS Redshift Survey (2MRS) (Huchra+, 2012)
J/ApJ/850/74 : Swift/BAT AGN Spectroscopic Survey. I. (Koss+, 2017)
J/ApJS/233/17 : Swift/BAT AGN spectroscopic survey. V. X-ray data
(Ricci+, 2017)
V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16)
(Ahumada+, 2020)
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
J/MNRAS/439/1648 : Subarcsecond mid-infrared atlas of local AGN (Asmus+, 2014)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 32 A32 --- Name Source name
34- 39 A6 --- Origin Origin of the galaxy (1)
41- 45 A5 --- 2MRS [true /false] Indicates if the galaxy is
in the 2MRS
47- 51 A5 --- Known [true /false] Indicates if the galaxy is
known to host an AGN
53- 57 A5 --- Starburst [true /false] Indicates if the galaxy is
known to host a starburst
59- 70 F12.8 deg RAdeg Right ascension (J2000)
72- 83 F12.8 deg DEdeg Declination (J2000)
85- 106 E22.19 --- z Redshift
108 I1 --- q_z [0/2] Redshift confidence flag (2)
110- 130 F21.18 Mpc Dist Source distance
132- 136 A5 --- Nonuc [true /false] If true the source does not
show any clear centre or nucleus in the
optical/infrared images
138- 143 F6.3 mag W1mag ? WISE W1 (3.4um) band magnitude
145- 149 F5.3 mag e_W1mag ? Error on W1mag
151 A1 --- q_W1mag Quality flag on W1mag (3)
153- 158 F6.3 mag W2mag ? WISE W2 (4.6um) band magnitude
160- 164 F5.3 mag e_W2mag ? Error on W2mag
166 A1 --- q_W2mag Quality flag on W2mag (3)
168- 173 F6.3 mag W3mag ? WISE W3 (12um) band magnitude
175- 179 F5.3 mag e_W3mag ? Error on W3mag
181 A1 --- q_W3mag Quality flag on W3mag (3)
183- 188 F6.3 mag W4mag ? WISE W4 (22um) band magnitude
190- 194 F5.3 mag e_W4mag ? Error on W4mag
196 A1 --- q_W4mag Quality flag on W4mag (3)
198- 219 E22.19 mag W1-W2 ? WISE W1-W2 colour
221- 242 F22.19 mag W2-W3 ? WISE W2-W3 colour
244- 261 F18.15 [10-7W] logLW1 ? Logarithm of W1 continuum luminosity (G1)
263- 280 F18.15 [10-7W] logLW3 ? Logarithm of W3 continuum luminosity (G1)
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Note (1): Origin as follows:
2MRS = 2MASS Redshift Survey (2MRS; Huchra et al. 2012ApJS..199...26H 2012ApJS..199...26H,
Cat. J/ApJS/199/26) (72/49546)
B70 = BAT AGN Spectroscopic Survey (BASS) (Koss et al. 2017ApJ...850...74K 2017ApJ...850...74K,
Cat. J/ApJ/850/74; Ricci et al. 2017ApJS..233...17R 2017ApJS..233...17R,
Cat. J/ApJS/233/17) (2/49546)
NED = NASA/IPAC Extragalactic Database (http://ned.ipac.caltech.edu/)
(47352/49546)
SDSS = Sloan Digital Sky Survey (Blanton et al. 2017AJ....154...28B 2017AJ....154...28B;
Aguado et al. 2019ApJS..240...23A 2019ApJS..240...23A) (85/49546)
SIMBAD = SIMBAD (http://simbad.u-strasbg.fr/simbad/), Wenger et al.
(2000A&AS..143....9W 2000A&AS..143....9W) (2032/49546)
Note (2): Redshift confidence flag as follows:
0 = the value is robust
1 = the value is not robust but there is no reason to doubt
2 = the redshift is controversial
Note (3): Quality flag as follows:
A = Quality A
B = Quality B
C = Quality C
U = The magnitude given is a lower limit
X = No magnitude given
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Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 28 A28 --- Name Source name
30- 34 A5 --- 2MRS [true /false] Indicates if the galaxy is
in the 2MRS
36- 40 A5 --- Seyfert [true /false] Indicates if the galaxy has
a Seyfert classification
42- 46 A5 --- Sy1 [true /false] Indicates if the galaxy has
a Sy1 classification
48- 52 A5 --- Sy2 [true /false] Indicates if the galaxy has
a Sy2 classification
54- 58 A5 --- LINER [true /false] Indicates if the galaxy has
a LINER classification
60- 64 A5 --- HII [true /false] Indicates if the galaxy has
a HII classification
66- 70 A5 --- Starburst [true /false] Indicates if the galaxy is
known to host a starburst
72- 83 F12.8 deg RAdeg Right ascension (J2000)
85- 96 F12.8 deg DEdeg Declination (J2000)
98- 118 F21.19 --- z Redshift
120- 137 F18.15 Mpc Dist Source distance
139- 152 A14 --- Swift Swift identifier (JHHMM.m+DDMMA)
154- 171 F18.16 mag W1-W2 WISE W1-W2 colour
173- 190 F18.16 mag W2-W3 ? WISE W2-W3 colour
192- 209 F18.15 [10-7W] logLW1 Logarithm of W1 continuum luminosity (G1)
211- 228 F18.15 [10-7W] logLW3 ? Logarithm of W3 continuum luminosity (G1)
230- 234 A5 --- l_logLnuc [true /false] Indicates if the logLnuc
given value is a lower limit
236- 253 F18.15 [10-7W] logLnuc Logarithm of the nuclear 12µm
luminosity of the AGN (G2)
255- 274 F20.18 [10-7W] e_logLnuc ? Error on logLnuc
276- 293 F18.15 [10-7W] logLint ? Logarithm of the intrinsic 2-10keV X-ray
luminosity (1)
295- 299 A5 --- S18 [true /false] Indicates if the source
fulfils the Satyapal, Abel & Secrest
(2018ApJ...858...38S 2018ApJ...858...38S) (G3)
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Note (1): From the BAT70 sample (Ricci et al. 2017ApJS..233...17R 2017ApJS..233...17R, Cat.
J/ApJS/233/17), and from Asmus et al. (2015MNRAS.454..766A 2015MNRAS.454..766A,
Cat. J/MNRAS/454/766) otherwise, where available
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 28 A28 --- Name Source name
30- 34 A5 --- 2MRS [true /false] Indicates if the galaxy is
in the 2MRS
36- 40 A5 --- HII [true /false] Indicates if the galaxy has
a HII classification
42- 46 A5 --- Starburst [true /false] Indicates if the galaxy is
known to host a starburst
48- 58 F11.7 deg RAdeg Right ascension (J2000)
60- 70 F11.7 deg DEdeg Declination (J2000)
72- 92 F21.19 --- z Redshift
94- 112 F19.16 Mpc Dist Source distance
114- 131 F18.16 mag W1-W2 WISE W1-W2 colour
133- 150 F18.16 mag W2-W3 WISE W2-W3 colour
152- 169 F18.15 [10-7W] logLW1 Logarithm of W1 continuum luminosity (G1)
171- 188 F18.15 [10-7W] logLW3 Logarithm of W3 continuum luminosity (G1)
190- 194 A5 --- l_logLW3 [true /false] Indicates if the logLW3
given value is a lower limit
196- 213 F18.15 [10-7W] logLnuc Logarithm of the nuclear 12µm
luminosity of the AGN (G2)
215- 233 F19.17 [10-7W] e_logLnuc Error on logLnuc
235- 239 A5 --- S18 [true /false] Indicates if the source
fulfils the Satyapal, Abel & Secrest
(2018ApJ...858...38S 2018ApJ...858...38S) (G3)
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Global Notes:
Note (G1): W1 and W3 continuum luminosities are calculated from the selected
distance and the profile-fitting magnitudes
Note (G2): logLnuc either taken from Asmus et al. (2014MNRAS.439.1648A 2014MNRAS.439.1648A, Cat.
J/MNRAS/439/1648), if uncertainty =<0.1dex, or estimated from L(W3)
and optical type (see Section 4.1 of the article for details)
Note (G3): Satyapal, Abel & Secrest (2018ApJ...858...38S 2018ApJ...858...38S) determined a
theoretical W2-W3 colour criterion to separate AGN and starbursts:
W2-W3<0.17(W1-W2+24.5), see Section 4.4.1 of the article for details
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 25-May-2023