Nearby Optical Galaxy (NOG) sample J/ApJ/543/178 ivo://CDS.VizieR/J/ApJ/543/178 doi:10.26093/cds/vizier.15430178 CDS Giuricin G. Marinoni C. Ceriani L. Pisani A. 2012-11-13T06:13:05Z 2001-05-04T22:58:02Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr galaxy-clusters galaxies redshifted apparent-magnitude In this paper we describe the Nearby Optical Galaxy (NOG) sample, which is a complete, distance-limited (cz<=6000km/s) and magnitude-limited (B<=14) sample of ~7000 optical galaxies. The sample covers 2/3 (8.27sr) of the sky (|b|>20{deg}) and appears to have a good completeness in redshift (97%). We select the sample on the basis of homogenized corrected total blue magnitudes in order to minimize systematic effects in galaxy sampling. We identify the groups in this sample by means of both the hierarchical and the percolation "friends-of-friends" methods. The resulting catalogs of loose groups appear to be similar and are among the largest catalogs of groups currently available. Most of the NOG galaxies (~60%) are found to be members of galaxy pairs (~580 pairs for a total of ~15% of objects) or groups with at least three members (~500 groups for a total of ~45% of objects). About 40% of galaxies are left ungrouped (field galaxies). We illustrate the main features of the NOG galaxy distribution. Compared to previous optical and IRAS galaxy samples, the NOG provides a denser sampling of the galaxy distribution in the nearby universe. Given its large sky coverage, the identification of groups, and its high-density sampling, the NOG is suited to the analysis of the galaxy density field of the nearby universe, especially on small scales. 2000ApJ...543..178G https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/543/178 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to VII/221 : PSCz catalog (Saunders+, 2000) J/PASP/111/438 : Updated Zwicky catalog (UZC) (Falco+, 1999) J/A+AS/100/47 : Study of group membership. II. (Garcia, 1993) http://leda.univ-lyon1.fr/ : LEDA homepage https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/543/178 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/543/178 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/543/178 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/543/178 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/543/178 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/543/178 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJ/543/178/table5 (Catalog of the Hierarchical (H) Groups) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/543/178/table5? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/543/178/table5? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/543/178/table5? GET text/xml+votable 180.0 50000 true 1.125219 5.520877 0.005555555555555556 Cone search capability for table J/ApJ/543/178/table6 (Catalog of the Percolation (P1) Groups) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/543/178/table6? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/543/178/table6? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/543/178/table6? GET text/xml+votable 180.0 50000 true 1.125219 5.520877 0.005555555555555556 Cone search capability for table J/ApJ/543/178/table7 (Catalog of the Percolation (P2) Groups) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/543/178/table7? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/543/178/table7? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/543/178/table7? GET text/xml+votable 180.0 50000 true 1.125219 5.520877 0.005555555555555556 Cone search capability for table J/ApJ/543/178/table2 (Galaxy Members of the Hierarchical (H) Catalog of Groups) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/543/178/table2? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/543/178/table2? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/543/178/table2? GET text/xml+votable 180.0 50000 true 1.123157 5.843098 0.005555555555555556 Cone search capability for table J/ApJ/543/178/table3 (Galaxy Members of the Percolation (P1) Catalog of Groups) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/543/178/table3? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/543/178/table3? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/543/178/table3? GET text/xml+votable 180.0 50000 true 1.123157 5.843098 0.005555555555555556 Cone search capability for table J/ApJ/543/178/table4 (Galaxy Members of the Percolation (P2) Catalog of Groups) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/543/178/table4? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/543/178/table4? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/543/178/table4? GET text/xml+votable 180.0 50000 true 1.123157 5.843098 0.005555555555555556 5/239 563 565 577 1975 2016 2659 2680 2727 2744 2848 4368 4398 4415 4493 4581 4995 5171 6146 6183 6209 6237 6262 6263 6374 6399 6442 6486 6578 6579 6917 6928 6930 6932 6935 6941 6965 6979 6984 6985 6986 7009 7056 7154 9060 9359 9691 9713 9717 9718 10905 10906 10917 10919 10956 10961 10969 10978 11159 11436 11439 11450 11498 11502 11619 11789 11793 11796 6/9 10 11 12 14 32 35 177 179 203 525 536 538 550 551 556 564 565 614 620 621 659 664 665 690 697 700 738 745 747 749 751 752 754 764 765 921 922 923 930 936 941 942 943 946 947 948 950 952 953 955 975 986 997 2121 2123 2131 2134 2141 2142 2143 2155 2166 2167 2173 2201 2206 2207 2210 2214 2215 2218 2221 2222 2227 2228 2230 2233 2236 2247 2248 2250 2251 2257 2259 2265 2266 2272 2273 2276 2285 2290 2303 2306 2307 2312 2320 2321 2324 2326 2332 2333 2346 2347 2354 2355 2356 2358 2360 2362 2370 2372 2432 2433 2436 2437 2560 2562 2564 2566 2568 2569 2570 2622 2709 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48458 48459 48462 48464 48468 48484 48487 48605 48658 48659 48665 48667 48739 48745 48858 48880 48884 48886 48942 49087 49130 49148 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/543/178?format=ascii Optical default J/ApJ/543/178/table5 Catalog of the Hierarchical (H) Groups recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int NOGG Nearby Optical Galaxy (NOG) group number (1) meta.id;meta.main int f_NOGG [*+=] See note (2) meta.code char Name Name of the brightest galaxy of the group meta.id.assoc char NGal Number of galaxy members of the group meta.number int RAB1950 Median group Right Ascension (B1950) pos.eq.ra;meta.main DEB1950 Median group Declination (B1950) pos.eq.dec;meta.main cz Median group recession velocity km/s phys.veloc;em.wl.central;stat.median int Common Common name of the group meta.id char P1 Percolation algorithm method 1 cross-id (3) meta.id char P2 Percolation algorithm method 2 cross-id (4) meta.id char LGG Cross-identification with Garcia (1983, Cat. <J/A+AS/100/47>) meta.id.cross char NBGG Cross-identification with Tully (1987ApJ...321..280T) meta.id.cross char _RA.icrs Right ascension (ICRS) (computed by VizieR, not part of the original data) pos.eq.ra nullable indexed _DE.icrs Declination (ICRS) (computed by VizieR, not part of the original data) pos.eq.dec nullable indexed
J/ApJ/543/178/table6 Catalog of the Percolation (P1) Groups recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int NOGG Nearby Optical Galaxy (NOG) group number (1) meta.id;meta.main int f_NOGG [*+=] See note (2) meta.code char Name Name of the brightest galaxy of the group meta.id.assoc char NGal Number of galaxy members of the group meta.number int RAB1950 Median group Right Ascension (B1950) pos.eq.ra;meta.main DEB1950 Median group Declination (B1950) pos.eq.dec;meta.main cz Median group recession velocity km/s phys.veloc;em.wl.central;stat.median int Common Common name of the group meta.id char P1 Percolation algorithm method 1 cross-id (3) meta.id char P2 Percolation algorithm method 2 cross-id (4) meta.id char LGG Cross-identification with Garcia (1983, Cat. <J/A+AS/100/47>) meta.id.cross char NBGG Cross-identification with Tully (1987ApJ...321..280T) meta.id.cross char _RA.icrs Right ascension (ICRS) (computed by VizieR, not part of the original data) pos.eq.ra nullable indexed _DE.icrs Declination (ICRS) (computed by VizieR, not part of the original data) pos.eq.dec nullable indexed
J/ApJ/543/178/table7 Catalog of the Percolation (P2) Groups recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int NOGG Nearby Optical Galaxy (NOG) group number (1) meta.id;meta.main int f_NOGG [*+=] See note (2) meta.code char Name Name of the brightest galaxy of the group meta.id.assoc char NGal Number of galaxy members of the group meta.number int RAB1950 Median group Right Ascension (B1950) pos.eq.ra;meta.main DEB1950 Median group Declination (B1950) pos.eq.dec;meta.main cz Median group recession velocity km/s phys.veloc;em.wl.central;stat.median int Common Common name of the group meta.id char P1 Percolation algorithm method 1 cross-id (3) meta.id char P2 Percolation algorithm method 2 cross-id (4) meta.id char LGG Cross-identification with Garcia (1983, Cat. <J/A+AS/100/47>) meta.id.cross char NBGG Cross-identification with Tully (1987ApJ...321..280T) meta.id.cross char _RA.icrs Right ascension (ICRS) (computed by VizieR, not part of the original data) pos.eq.ra nullable indexed _DE.icrs Declination (ICRS) (computed by VizieR, not part of the original data) pos.eq.dec nullable indexed
J/ApJ/543/178/table2 Galaxy Members of the Hierarchical (H) Catalog of Groups recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int NOGG Nearby Optical Galaxy (NOG) group number (1) meta.id.parent int PGCGal Name of galaxy member of the group, from Gourgoulhon et al. (1992A&A...255...69G) & Fouque et al. (1992A&AS...93..211F) (2) meta.id;meta.main char NameGal Other name of "PGCGal" galaxy member meta.id char RAB1950 Galaxy member right Ascension (B1950) pos.eq.ra;meta.main DEB1950 Galaxy member declination (B1950) pos.eq.dec;meta.main cz Velocity (in Local Group Frame) km/s phys.veloc int r_cz Velocity reference (3) meta.ref;pos.frame char Bmag Corrected B band magnitude mag phot.mag;em.opt.B float r_Bmag B magnitude reference (4) meta.ref;pos.frame char _RA.icrs Right ascension (ICRS) (computed by VizieR, not part of the original data) pos.eq.ra nullable indexed _DE.icrs Declination (ICRS) (computed by VizieR, not part of the original data) pos.eq.dec nullable indexed
J/ApJ/543/178/table3 Galaxy Members of the Percolation (P1) Catalog of Groups recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int NOGG Nearby Optical Galaxy (NOG) group number (1) meta.id.parent int PGCGal Name of galaxy member of the group, from Gourgoulhon et al. (1992A&A...255...69G) & Fouque et al. (1992A&AS...93..211F) (2) meta.id;meta.main char NameGal Other name of "PGCGal" galaxy member meta.id char RAB1950 Galaxy member right Ascension (B1950) pos.eq.ra;meta.main DEB1950 Galaxy member declination (B1950) pos.eq.dec;meta.main cz Velocity (in Local Group Frame) km/s phys.veloc int r_cz Velocity reference (3) meta.ref;pos.frame char Bmag Corrected B band magnitude mag phot.mag;em.opt.B float r_Bmag B magnitude reference (4) meta.ref;pos.frame char _RA.icrs Right ascension (ICRS) (computed by VizieR, not part of the original data) pos.eq.ra nullable indexed _DE.icrs Declination (ICRS) (computed by VizieR, not part of the original data) pos.eq.dec nullable indexed
J/ApJ/543/178/table4 Galaxy Members of the Percolation (P2) Catalog of Groups recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int NOGG Nearby Optical Galaxy (NOG) group number (1) meta.id.parent int PGCGal Name of galaxy member of the group, from Gourgoulhon et al. (1992A&A...255...69G) & Fouque et al. (1992A&AS...93..211F) (2) meta.id;meta.main char NameGal Other name of "PGCGal" galaxy member meta.id char RAB1950 Galaxy member right Ascension (B1950) pos.eq.ra;meta.main DEB1950 Galaxy member declination (B1950) pos.eq.dec;meta.main cz Velocity (in Local Group Frame) km/s phys.veloc int r_cz Velocity reference (3) meta.ref;pos.frame char Bmag Corrected B band magnitude mag phot.mag;em.opt.B float r_Bmag B magnitude reference (4) meta.ref;pos.frame char _RA.icrs Right ascension (ICRS) (computed by VizieR, not part of the original data) pos.eq.ra nullable indexed _DE.icrs Declination (ICRS) (computed by VizieR, not part of the original data) pos.eq.dec nullable indexed