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. =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), 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), 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), 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), 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), 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 = H{alpha} 6563{AA} 1 = [NII] 6548{AA} 2 = [NII] 6583{AA} 3 = H{beta} 4861{AA} 4 = [OIII] 5007{AA} 5 = [OI] 6364{AA} 6 = [SII] 6716{AA} 7 = [SII] 6730{AA} Note (3): Equivalences of units: 10^-10^m = 0.1nm = 1{AA} 10^-20^W/m^2^ = 10^-17^erg/s/cm 10^-10^W/m^3^ = 10^-17^erg/s/cm2/{AA} -------------------------------------------------------------------------------- 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), 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]/H{alpha} 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]/H{beta} 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]/H{alpha} 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]/H{alpha} 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), 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), 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), 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) (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, Cat. J/A+A/411/391 Sulentic et al., Paper II 2006A&A...449..937S Cat. J/A+A/449/937 Lisenfeld et al., Paper III 2007A&A...462..507L, Cat. J/A+A/462/507 Verley et al., Paper IV 2007A&A...470..505V, Cat. J/A+A/470/505 Verley et al., Paper V 2007A&A...472..121V, Cat. J/A+A/472/121 Leon et al., Paper VI 2008A&A...485..475L, Cat. J/A+A/485/475 Sabater et al., Paper VII 2008A&A...486...73S, Cat. J/A+A/486/73 Espada et al., Paper VIII 2011A&A...532A.117E, Cat. J/A+A/532/A117 Lisenfeld et al., Paper IX 2011A&A...534A.102L, Cat. J/A+A/534/A102 Fernandez Lorenzo et al., Paper X 2012A&A...540A..47F, Cat. J/A+A/540/A47 ================================================================================ (End) Jose Sabater [IfA, Edinburgh], Patricia Vannier [CDS] 21-Jun-2012