J/A+A/545/A15 AMIGA XI. Optical nuclear activity (Sabater+, 2012)
The AMIGA sample of isolated galaxies.
XI. Optical characterisation of nuclear activity.
Sabater J., Verdes-Montenegro L., Leon S., Best P., Sulentic J.
<Astron. Astrophys. 545, A15 (2012)>
=2012A&A...545A..15S 2012A&A...545A..15S
ADC_Keywords: Galaxy catalogs ; Galaxies, spectra ; Active gal. nuclei
Keywords: galaxies: evolution - galaxies: interactions -
galaxies: active - surveys
Abstract:
This study was performe within the frame of the AMIGA project
(http://amiga.iaa.es/). We obtained spectral data from the 6th Data
Release of the Sloan Digital Sky Survey, which were inspected in a
semi-automatic way. We subtracted the underlying stellar populations
from the spectra (using the software Starlight) and modelled the
nuclear emission features. Standard emission-line diagnostics diagrams
were applied, using a new classification scheme that takes into
account censored data, to classify the type of nuclear emission. We
provide a final catalogue of spectroscopic data, stellar populations,
emission lines and classification of optical nuclear activity for
AMIGA galaxies.
The prevalence of optical active galactic nuclei (AGN) in AMIGA
galaxies is 20.4%, or 36.7% including transition objects. The
fraction of AGN increases steeply towards earlier morphological types
and higher luminosities. We compare these results with a matched
analysis of galaxies in isolated denser environments (Hickson Compact
Groups). After correcting for the effects of the morphology and
luminosity, we find that there is no evidence for a difference in the
prevalence of AGN between isolated and compact group galaxies, and we
discuss the implications of this result. We find that a major
interaction is not a necessary condition for the triggering of optical
AGN.
Description:
We present a catalogue of nuclear activity, traced by optical emission
lines, in a well-defined sample of the most isolated galaxies in the
local Universe, which was used as a basis for studying the effect of
the environment on nuclear activity.
The new data is presented and the rest of the data used in the study
is also presented for future reference and to allow the data
replication and reproducibility.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 63 1050 Near-infrared, optical and morphology data for
AMIGA galaxies
table2.dat 92 362 SDSS nuclear spectra properties
table3.dat 27 344 Starlight output
table4.dat 27 15480 Starlight estimated stellar populations
table5.dat 58 2752 Measurement of the lines
notes.dat 161 48 Comments to table5.dat
table6.dat 94 344 Line ratios
table7.dat 42 353 Final classification of nuclear activity
tablea1.dat 56 549 SDSS photometric properties
tablea2.dat 17 226 Hyperleda data for AMIGA galaxies
tablea3.dat 25 270 Hyperleda data for HCG galaxies
--------------------------------------------------------------------------------
See also:
VII/82 : Catalogue of Isolated Galaxies (Karachentseva+ 1986)
J/A+A/411/391 : AMIGA project. Revised positions for CIG galaxies (Leon+ 2003)
J/A+A/449/937 : AMIGA II. Morphological refinement (Sulentic+, 2006)
J/A+A/462/507 : AMIGA III. IRAS data (Lisenfeld+, 2007)
J/A+A/470/505 : AMIGA IV. Neighbours around CIG galaxies (Verley+, 2007)
J/A+A/472/121 : AMIGA V. Isolation parameters (Verley+, 2007)
J/A+A/485/475 : AMIGA VI. Radio fluxes of the isolated galaxies (Leon+ 2008)
J/A+A/486/73 : AMIGA VII. FIR and radio study (Sabater+, 2008)
J/A+A/532/A117 : AMIGA VIII. Flux ratio asymmetry parameter (Espada+, 2011)
J/A+A/534/A102 : AMIGA IX. Molecular gas properties (Lisenfeld+, 2011)
J/A+A/540/A47 : AMIGA X. Isolated galaxy colors (Fernandez Lorenzo+, 2012)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- CIG [1/1051] CIG (VII/82), <K73 NNNN> in Simbad
6- 17 E12.3 Jy fks ? Flux density in Ks-band
19- 30 E12.2 Jy e_fks ? Error in the flux density in Ks-band
32- 38 F7.4 [Lsun] logLks ? Log of the luminosity in ks-band (1)
40- 45 F6.4 [Lsun] e_logLks ? Error in the log of luminosity in Ks-band
47- 48 I2 --- f_logLks [-1/2] Code for the infrared luminosity (2)
50- 54 F5.2 [Lsun] logLB ? Log of the optical luminosity in B-band (1)
56- 59 F4.1 --- MType Morphological type (RC3)
61- 63 F3.1 --- e_MType ? Error in the morphological type
--------------------------------------------------------------------------------
Note (1): Lks given in log of Ks-band solar luminosity;
LB given in log of bolometric solar luminosity.
Note (2): Code for the infrared luminosity as follows:
-1 = if the galaxy does not have distance data
0 = if the galaxy does not have NIR data
1 = if the galaxy has NIR data and distance
2 = if there are 2 NIR sources for the galaxy, the brightest one is selected
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- CIG [1/1051] CIG (VII/82), <K73 NNNN> in Simbad
6- 9 I4 --- Plate SDSS Plate parameter
11- 15 I5 --- MJD SDSS MJD parameter
17- 19 I3 --- Fiber SDSS Fiber parameter
21 I1 --- cc [0/1] Completeness code: 1=galaxy belongs
to the complete sample
23- 31 F9.7 --- z ? Redshift
33- 45 F13.7 --- e_z ? Error in the redshift
47- 49 I3 km/s v ? Velocity dispersion
51- 53 I3 km/s e_v ? Error in the velocity dispersion
55- 63 F9.7 --- zsp ? Redshift (using "specBS" pipeline)
65- 77 F13.7 --- e_zsp ? Error in the redshift (specBS pipeline)
79- 83 F5.1 km/s sigma ? Velocity dispersion (specBS pipeline)
85- 89 F5.1 km/s e_sigma ? Error in the velocity dispersion (specBS)
91- 92 A2 --- Com [BL BZ] broad lines or bad zones (2)
--------------------------------------------------------------------------------
Note (2): Comments as follows:
BL = Galaxy with broad lines
BZ = Galaxy with bad spectral zones
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- CIG [1/1051] CIG (VII/82), <K73 NNNN> in Simbad
6- 12 F7.2 km/s vshift Velocity shift obtained by StarLight
14- 19 F6.2 km/s vdisp Velocity dispersion obtained by StarLight
21- 27 F7.4 --- Anu Optical extinction obtained by StarLight (3)
--------------------------------------------------------------------------------
Note (3): in a few cases (4.7%) Starlight found slightly negative
extinctions, which may indicate that the determination of the
underlying stellar populations is not fully reliable; however, the
fitted spectra are sufficient to remove the absorption features.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- CIG [1/1051] CIG (VII/82), <K73 NNNN> in Simbad
6- 13 F8.2 Ma Age Age of the stellar population
15- 19 F5.3 --- Z Metallicity of the stellar population
21- 27 F7.4 % Per Percentage of this stellar population component
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- CIG [1/1051] CIG (VII/82), <K73 NNNN> in Simbad
6 I1 --- Line [0/7] Line code (1)
8 I1 --- l_Flux [0/1] Limit code for the flux: 1=upper limit
10- 16 F7.1 10-20W/m2 Flux Flux of the line (3)
18- 22 F5.1 10-20W/m2 e_Flux Error in the flux of the line (3)
24- 32 F9.4 10-10W/m3 pkInt Peak intensity of the line (3)
34- 40 F7.4 10-10m Width Width of the line (3)
42- 48 F7.2 10-10m Pos Position of the line (3)
50- 55 F6.4 10-10W/m3 sigma Estimated intensity of the noise (3)
57- 58 I2 --- Com ? Comments code, in notes.dat file
--------------------------------------------------------------------------------
Note (1): Line code as follows:
0 = Hα 6563Å
1 = [NII] 6548Å
2 = [NII] 6583Å
3 = Hβ 4861Å
4 = [OIII] 5007Å
5 = [OI] 6364Å
6 = [SII] 6716Å
7 = [SII] 6730Å
Note (3): Equivalences of units:
10-10m = 0.1nm = 1Å
10-20W/m2 = 10-17erg/s/cm
10-10W/m3 = 10-17erg/s/cm2/Å
--------------------------------------------------------------------------------
Byte-by-byte Description of file: notes.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Com Comments code
4-161 A158 --- Text Comment
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- CIG [1/1051] CIG (VII/82), <K73 NNNN> in Simbad
6 I1 --- f_logNIIa [0/1] Detection code of the line ratio (1)
8- 9 I2 --- l_logNIIa [-1/1] Limit code of logNIIa, 0=ok (2)
11- 19 F9.6 [---] logNIIa log of [NII]/Hα line ratio
21- 28 F8.6 [---] e_logNIIa Error in logNIIa
30 I1 --- f_logOIIIb [0/1] Detection code of logOIIIb, 1=ok (1)
32- 33 I2 --- l_logOIIIb [-1/1] Limit code of logOIIIb, 0=ok (2)
35- 41 F7.4 [---] logOIIIb log of [OIII]/Hβ line ratio
43- 48 F6.4 [---] e_logOIIIb Error in logOIIIb
50 I1 --- f_logSIIa [0/1] Detection code of logSIIa, 1=ok (1)
52 I1 --- l_logSIIa [-1/1] Limit code of logSIIa, 0=ok (2)
54- 62 F9.6 [---] logSIIa log of [SII]/Hα line ratio
64- 71 F8.6 [---] e_logSIIa Error in logSIIa
73 I1 --- f_logOIa [0/1] Detection code of logOIa, 1=ok (1)
75 I1 --- l_logOIa [-1/1] Limit code of logOIa, 0=ok (2)
77- 85 F9.6 [---] logOIa log of [OI]/Hα line ratio
87- 94 F8.6 [---] e_logOIa Error in logOIa
--------------------------------------------------------------------------------
Note (1): Detection code is:
1 = The line ratio is well determined; at least one of the lines is detected
0 = The line ratio is not well determined; The two lines are upper limits
Note (2): Limit code is:
-1 = The line ratio is a lower limit
0 = The line ratio is a detection
1 = The line ratio is an upper limit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- CIG [1/1051] CIG (VII/82), <K73 NNNN> in Simbad
6- 14 A9 --- cl.NII Classification with [NII] diagnostic diagram (1)
16- 20 A5 --- cl.SII Classification with [SII] diagnostic diagram (1)
22- 26 A5 --- cl.OI Classification with [OI] diagnostic diagram (1)
28- 36 A9 --- Class Final classification (1) (2)
38- 42 A5 --- TOType Transition object type (1)
--------------------------------------------------------------------------------
Note (1): Possible classifications are:
SFN = star-forming nucleus
TO = transition object
NLAGN = narrow line AGN (Seyfert 2 or LINER)
LINER = LINER
Sy1 = Seyfert 1
Sy2 = Seyfert 2
UNK = unknown (only for the TO subtype)
Note (2): Three galaxies have no unambiguous classification between TO and
NLAGN ("TO or NLAGN") and three more between TO and SFN ("TO or SFN")
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- CIG [1/1051] CIG (VII/82), <K73 NNNN> in Simbad
6- 23 A18 --- ObjId SDSS ObjId parameter
25- 29 F5.2 mag umag SDSS u-band magnitude
31- 35 F5.2 mag gmag SDSS g-band magnitude
37- 41 F5.2 mag rmag SDSS r-band magnitude
43- 47 F5.2 mag imag SDSS i-band magnitude
49- 53 F5.2 mag zmag SDSS z-band magnitude
56 I1 --- Com [1]? 1 : Galaxies with poor photometry
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- CIG [1/1051] CIG (VII/82), <K73 NNNN> in Simbad
6- 9 F4.1 --- MType Morphological type (RC3)
11- 17 F7.3 mag BMAG ? Absolute magnitude in B-band
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- HCG HCG galaxy name (all but 6 in HCG catalog,
Cat. VII/213)
7- 10 F4.1 --- MType Morphological type (RC3)
12- 18 F7.3 mag BMAG ? Absolute magnitude in B-band
20- 25 A6 --- Class Nuclear activity classification
(Matinez et al. 2010ASPC..421..125M 2010ASPC..421..125M) (1)
--------------------------------------------------------------------------------
Note (1): classes are: TO = Transition Object; AGN;
or SFN = star-forming nucleus
--------------------------------------------------------------------------------
Acknowledgements:
Jose Sabater, jsm(at)roe.ac.uk
References:
Leon et al., Paper I 2003A&A...411..391L 2003A&A...411..391L, Cat. J/A+A/411/391
Sulentic et al., Paper II 2006A&A...449..937S 2006A&A...449..937S Cat. J/A+A/449/937
Lisenfeld et al., Paper III 2007A&A...462..507L 2007A&A...462..507L, Cat. J/A+A/462/507
Verley et al., Paper IV 2007A&A...470..505V 2007A&A...470..505V, Cat. J/A+A/470/505
Verley et al., Paper V 2007A&A...472..121V 2007A&A...472..121V, Cat. J/A+A/472/121
Leon et al., Paper VI 2008A&A...485..475L 2008A&A...485..475L, Cat. J/A+A/485/475
Sabater et al., Paper VII 2008A&A...486...73S 2008A&A...486...73S, Cat. J/A+A/486/73
Espada et al., Paper VIII 2011A&A...532A.117E 2011A&A...532A.117E, Cat. J/A+A/532/A117
Lisenfeld et al., Paper IX 2011A&A...534A.102L 2011A&A...534A.102L, Cat. J/A+A/534/A102
Fernandez Lorenzo et al., Paper X 2012A&A...540A..47F 2012A&A...540A..47F, Cat. J/A+A/540/A47
(End) Jose Sabater [IfA, Edinburgh], Patricia Vannier [CDS] 21-Jun-2012