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J/A+A/486/73        AMIGA VII. FIR and radio study             (Sabater+, 2008)

The AMIGA sample of isolated galaxies. VII. Far-infrared and radio continuum study of nuclear activity. Sabater J., Leon S., Verdes-Montenegro L., Lisenfeld U., Sulentic J., Verley S. <Astron. Astrophys. 486, 73 (2008)> =2008A&A...486...73S
ADC_Keywords: Surveys ; Galaxies, radio ; Infrared sources Keywords: galaxies: evolution - galaxies: interaction - galaxies: active - surveys Abstract: This paper is part of a series involving the AMIGA project (Analysis of the Interstellar Medium of Isolated GAlaxies). This project provides a statistically-significant sample of the most isolated galaxies in the northern sky. We present a study of the nuclear activity in a well-defined sample of the most isolated galaxies (total sample: n=1050, complete subsample: n=719) in the local Universe traced by their far-infrared (FIR) and radio continuum emission. We use the well-known radio continuum-FIR correlation to select radio-excess galaxies that are candidates to host an active galactic nucleus (AGN), as well as the FIR colours to find obscured AGN-candidates. We also used the existing information on nuclear activity in the Veron-Cetty catalogue and in the NASA Extragalactic Database. A final catalogue of AGN-candidate galaxies has been produced that will provide a baseline for studies on the dependence of activity on the environment. Our sample is mostly radio quiet, consistent with its high content of late-type galaxies. At most ∼1.5% of the galaxies show a radio excess with respect to the radio-FIR correlation, and this fraction even goes down to less than 0.8% after rejection of back/foreground sources using FIRST. We find that the fraction of FIR colour selected AGN-candidates is ∼28% with a lower limit of ∼7%. Our final catalogue contains 89 AGN candidates and is publicly available on the AMIGA web page ( File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 34 81 Galaxies from AMIGA sample listed as active in the literature table2.dat 35 20 Radio-excess galaxies found using the radio-FIR correlation table4.dat 23 8 Radio-excess galaxies in FIRST table5.dat 31 197 Classified galaxies using the IRAS colour method table6.dat 47 89 Catalogue of AGN-candidates for the total sample
See also: VII/82 : Catalogue of Isolated Galaxies (Karachentseva+ 1986) VII/83 : Isolated Triplets of galaxies (Karachentseva+ 1988) VII/213 : Hickson's Compact groups of Galaxies (Hickson+ 1982-1994) J/A+A/411/391 : Revised positions for Cat. of Isolated galaxies (Leon+, 2003) J/A+A/436/443 : Recession velocities of CIG galaxies (Verdes-Montenegro+ 2005) 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. GIG galaxies radio continuum properties (Leon+ 2008) J/A+A/532/A117 : AMIGA VIII. Flux ratio asymmetry parameter (Espada+, 2011) : AMIGA HomePage Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 4 I4 --- CIG CIG (VII/82) galaxy number (K73 NNNN in Simbad) 8- 18 A11 --- Type1 NED classification (1) 22- 27 A6 --- Type2 Veron-Cetty Catalogue (Cat. VII/248) classification (1) 30- 34 A5 --- Type3 This study classification (1)(2)
Note (1): Classification as follows: Sy = Seyfert HII = nuclear HII region Sbrt = starburst SBNG = small bright nucleus galaxy NLAGN = narrow-line active galaxy (a mixture of Seyfert 2's, LINERS, and starburst/AGN composites) DANS = dwarf amorphous nuclei starburst galaxy Note (2): Classification obtained discarding those cases where a disagreement was found between the NED and Veron-Cetty classification.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1 A1 --- Sample [S] S for galaxy belonging to the complete subsample 3- 6 I4 --- CIG CIG (VII/82) galaxy number (K73 NNNN in Simbad) 9- 13 F5.2 [solLum] logLFIR Far-infrared luminosity, from Lisenfeld et al., (2007, Cat. J/A+A/462/507) 16 I1 --- l_logLFIR [0/1] 0=detection, 1=upper limit on logLFIR 20- 24 F5.2 [W/Hz] logL1.4GHz Radio continuum luminosity a 1.4GHz from Leon et al. (2008, Cat. J/A+A/485/475) 27- 30 A4 --- MType Morphological type (2) 32- 35 F4.1 --- Excess Radio luminosity excess (1)
Note (1): ratio of actual to expected radio flux from radio-FIR correlation Note (2): From Sulentic et al. (2006, Cat. J/A+A/449/937), except for CIG 999 (Karachentseva, 1973, Cat. VII/82, NED).
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 4 I4 --- CIG CIG (VII/82) number (K73 NNNN in Simbad) 7- 10 F4.1 mJy NVSS NVSS (Cat. VIII/65) radio continuum flux at 1.4GHz 13- 17 F5.2 mJy FIRST FIRST (Cat. VIII/71) radio continuum flux at 1.4GHz (1) 20- 23 F4.1 arcsec Dist Distance to the nearest FIRST source if more than one source is present
Note (1): Sum of FIRST fluxes within the NVSS search radius if more than one source is present.
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1 A1 --- Sample [S] S for galaxy belonging to the complete subsample 3- 6 I4 --- CIG CIG (VII/82) number (K73 NNNN in Simbad) 9- 13 F5.2 Jy S25um Flux density at 25um (1) 15 I1 --- l_S25um [0/1] 0=detection, 1=upper limit on S25um 18- 22 F5.2 Jy S60um Flux density at 60um (1) 24 I1 --- l_S60um [0/1] 0=detection, 1=upper limit on S60um 26- 31 A6 --- Type Classification (2)
Note (1): Data from Lisenfeld et al., (2007, Cat. J/A+A/462/507). Note (2): The value can be "AGN" for AGN-candidate galaxies with the IRAS colour methor or "normal" in any other case.
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 4 I4 --- CIG CIG (VII/82) number (K73 NNNN in Simbad) 6- 7 I2 h RAh Right ascension (J2000) 9- 10 I2 min RAm Right ascension (J2000) 12- 16 F5.2 s RAs Right ascension (J2000) 18 A1 --- DE- Declination sign (J2000) 19- 20 I2 deg DEd Declination (J2000) 22- 23 I2 arcmin DEm Declination (J2000) 25- 28 F4.1 arcsec DEs Declination (J2000) 30- 34 A5 --- Type1 Classification in the literature (see table1) 36- 41 A6 --- Type2 AGN candidates using the FIR colour criterion 43 I1 --- F3 [0/1] 1 if radio-excess candidate galaxy using a factor 3 cutoff, 0 if not 45 I1 --- F5 [0/1] 1 if radio-excess candidate galaxy using a factor 5 cutoff, 0 if not 47 I1 --- Sample [0/1] 1 if galaxy belongs to the complete subsample, 0 if not
Acknowledgements: J. Sabater, jsm(at) History: Copied at 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 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) J. Sabater [IAA-CSIC], Patricia Vannier [CDS] 04-Jul-2008
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