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J/MNRAS/426/296   Compact Groups of galaxies from 2MASX    (Diaz-Gimenez+, 2012)

Compact groups of galaxies selected by stellar mass: the 2MASS compact group catalogue. Diaz-Gimenez E., Mamon G.A., Pacheco M., Mendes De Oliveira C., Alonso M.V. <Mon. Not. R. Astron. Soc., 426, 296-316 (2012)> =2012MNRAS.426..296D
ADC_Keywords: Clusters, galaxy ; Galaxy catalogs ; Morphology ; Radial velocities Keywords: catalogues - galaxies: groups: general - galaxies: interactions Abstract: We present a photometric catalogue of compact groups of galaxies (p2MCGs) automatically extracted from the Two-Micron All Sky Survey (2MASS) extended source catalogue. A total of 262 p2MCGs are identified, following the criteria defined by Hickson, of which 230 survive visual inspection (given occasional galaxy fragmentation and blends in the 2MASS parent catalogue). Only one quarter of these 230 groups were previously known compact groups (CGs). Among the 144 p2MCGs that have all their galaxies with known redshifts, 85 (59%) have four or more accordant galaxies. This v2MCG sample of velocity-filtered p2MCGs constitutes the largest sample of CGs (with N≥4) catalogued to date, with both well-defined selection criteria and velocity filtering, and is the first CG sample selected by stellar mass. It is fairly complete up to Kgroup∼9 and radial velocity of ∼6000km/s. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablec1.dat 110 85 CGs after velocity filtering in the 2MASS XSC tablec2.dat 92 364 Galaxies in Compact Groups after the velocity filtering, identified in the 2MASX catalogue
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006) VII/74 : Atlas of Peculiar Galaxies (Arp 1966) VII/77 : Isolated Pairs of Galaxies in Northern Hemisphere (Karachentsev 1972) VII/83 : Isolated Triplets of galaxies (Karachentseva+ 1988) VII/170 : Catalogue of Southern Peculiar Galaxies and Associations (Arp+, 1987) VII/213 : Hickson's Compact groups of Galaxies (Hickson+ 1982-1994) VII/236 : Interacting galaxies catalogue (Vorontsov-Velyaminov+, 2001) J/AJ/118/2014 : Nearby poor clusters of galaxies catalog (White+, 1999) J/AJ/123/2976 : The UZC-SSRS2 group catalog (Ramella+, 2002) J/A+A/445/857 : DPOSS II compact group survey (Pompei+, 2006) J/A+A/539/A106 : DPOSS II compact group survey. EMMI-NTT sample (Pompei+ 2012) J/A+A/474/783 : Main galaxy groups from SDSS-DR5 (Deng+, 2007) J/A+A/479/927 : Group of galaxies in SDSS 5 (Tago+, 2008) J/MNRAS/395/255 : Compact groups of galaxies in SDSS DR6 (McConnachie+, 2009) J/A+A/514/A102 : SDSS DR7 groups of galaxies (Tago+, 2010) J/A+A/540/A106 : SDSS-DR8 groups and clusters of galaxies (Tempel+, 2012) J/A+A/520/A42 : Galaxy groups in the VIMOS-VLT Deep Survey (Cucciati+, 2010) J/ApJ/655/790 : Groups of galaxies in 2MASS survey (Crook+, 2007) Byte-by-byte Description of file: tablec1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- CG [1/85] Group identification number 4- 5 I2 h RAh CG centre Right ascension (J2000) 7- 8 I2 min RAm CG centre Right ascension (J2000) 10- 11 I2 s RAs CG centre Right ascension (J2000) 13 A1 --- DE- CG centre Declination sign (J2000) 14- 15 I2 deg DEd CG centre Declination (J2000) 17- 18 I2 arcmin DEm CG centre Declination (J2000) 20- 21 I2 arcsec DEs CG centre Declination (J2000) 23- 27 I5 km/s RV Median radial velocity 29 I1 --- Ng Number of galaxy members in the CG in the range of 3mag from the brightest member 31- 35 F5.2 mag Kmagb Extinction-corrected K-band apparent magnitude of the brightest galaxy 37- 41 F5.2 mag/arcsec2 muK Extinction-corrected K-band group surface brightness 43- 47 F5.2 arcmin theta Angular diameter θG of the smallest circumscribed circle to the group 49- 54 F6.2 kpc <Rij> Median projected separation among galaxies (in kpc/h, Ho=100h.km/s/Mpc) 56- 59 F4.2 --- b/a [0/1] Apparent group elongation 61- 63 I3 km/s sigma Radial velocity dispersion of the galaxies in the CG 65- 69 F5.3 --- H0.tcr Dimensionless crossing time 71- 74 I4 Msun/Lsun M/L Mass-to-light ratio in the K band (in h*M/L, Ho=100h.km/s/Mpc) 76-110 A35 --- CID Cross-identification with other group catalogues (1)
Note (1): Acronyms used for cross-IDs: AM = Arp+Madore Southern Peculiar Galaxies and Associations (Arp & Madore 1987, Cat. VII/170) Arp = Arp Peculiar Galaxies (Arp 1966, Cat. VII/74) HCG = Hickson Compact Group (Hickson 1982, Cat. VII/213) HDCE = high-density-contrast groups - erratum version (Crook et al. 2008, ApJ, 685, 1320 erratum to 2007ApJ...655..790C) KPG = Karachentsev Isolated Pairs of Galaxies Catalogue (Karachentsev 1972, Cat. VII/77) KTG = Karachentsev Isolated Triplets of Galaxies Catalogue (Karachentsev, Karachentsev & Lebedev 1988, Cat. VII/83) KTS = Karachentseva Triple System (Karachentseva & Karachentsev 2000, Cat. J/PAZh/77/569) M60 = Mamon (1989A&A...219...98M, 2008A&A...486..113M) Rose = Rose Compact Groups of Galaxies (Rose 1977ApJ...211..311R) RSCG = Redshift Survey Compact Group (Barton et al. 1996AJ....112..871B) SCG = Southern Compact Group (Prandoni et al. 1994AJ....107.1235P ; Iovino 2002AJ....124.2471I) UZC-CG = Updated Zwicky Catalogue-Compact Group (Focardi & Kelm 2002, Cat. J/A+A/391/35) USGC = UZC/SSRS2 Group Catalogue (Ramella et al. 2002, Cat. J/AJ/123/2976) VV = Interacting galaxies catalogue (Vorontsov-Velyaminov, Noskova & Arkhipova 2001, Cat. VII/236) WBL = White+Bliton+Bhavsar groups (White et al. 1999, Cat. J/AJ/118/2014)
Byte-by-byte Description of file: tablec2.dat
Bytes Format Units Label Explanations
2- 3 I2 --- CG [1/85] Group identification number 5- 6 I2 --- Gal Galaxy identification number within the group 8- 9 I2 h RAh CG centre Right ascension (J2000) 11- 12 I2 min RAm CG centre Right ascension (J2000) 14- 18 F5.2 s RAs CG centre Right ascension (J2000) 20 A1 --- DE- CG centre Declination sign (J2000) 21- 22 I2 deg DEd CG centre Declination (J2000) 24- 25 I2 arcmin DEm CG centre Declination (J2000) 27- 31 F5.2 arcsec DEs CG centre Declination (J2000) 33- 37 F5.2 mag Kmag Galactic Extinction-corrected K-band apparent magnitude 39- 43 F5.2 mag Kcorr k-correction in the K-band computed from Chilingarian et al. (2010MNRAS.405.1409C) as a function of redshift and colour (H-K) 45- 49 I5 km/s RV Radial velocity 52- 54 I3 km/s e_RV rms uncertainty on RV 56 I1 --- r_RV Catalogue from which the radial velocity and errors were extracted (1) 58- 75 I18 --- objID ?=0 Object ID in the SDSS database 77- 92 A16 --- 2MASX ID in the 2MASS database, HHMMSSss+DDMMSSs (Cat. VII/233)
Note (1): References for radial velocities as follows: 0 = NED 1 = main 2MRS (Huchra et al. 2012, Cat. J/ApJS/199/26) 2 = extra 2MRS (Huchra et al. 2012, Cat. J/ApJS/199/26) 3 = 2M++ redshift compilation (Lavaux & Hudson, 2011, Cat. J/MNRAS/416/2840)
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Apr-2013
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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