J/AJ/113/483ivo://CDS.VizieR/J/AJ/113/483doi:10.26093/cds/vizier.51130483CDSRamella M.Pisani A.Geller M.J.2023-04-06T16:50:25Z1997-12-09T20:40:40ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxiescatalogsgalaxy-kinematicsWe use a friends-of-friends algorithm to identify loose groups from the northern CfA2 survey covering the region 8h<={alpha}_(1950)_<=17h and 8.5{deg}<={delta}_(1950)_<=44.5{deg}. There are 406 groups; 149 of these contains five or more members within the survey. Geometric simulations guide our choice of the selection parameters; {delta}{rho}/{rho}=80 is the limiting density contrast and V0=350km/s is the fiducial velocity linking parameter. The geometric simulations are particularly important for evaluating the impact of large-scale structure (e.g., the Great Wall) on group selection. The physical parameters of this large sample are coincident with our earlier results [126 groups in Ramella et al. (1989ApJ...344...57R)]: the median velocity dispersion in 192 (156; 229)km/s and the median blue log(M/L) is 2.38 (2.20; 2.52). The mass-to-light ratio (M/L) is in units of Msun/Lsun for an assumed Hubble constant, H0=100km/s/Mpc. The numbers in parentheses are 99% confidence limits. This group catalog provides a substantially larger sample for statistical studies than has been previously available. For example, it provides a more substantial sample for estimation of the distribution of group velocity dispersions and of the group-group correlation function. (Copyright) 1997 American Astronomical Society.1997AJ....113..483Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/113/483CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/193 : ZCat (The CfA Redshift Catalogue) Version June 1995 (Huchra+ 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/113/483https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/113/483http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/113/483https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/113/483https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/113/483http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/113/483GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/113/483/table1 (List of the values of group parameters for d{rho}/{rho}=80 and V_0_=350km/s)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/113/483/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/113/483/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/113/483/table1?GETtext/xml+votable180.050000true126.711223.010.0055555555555555566/4181 4188 4209 4215 4300-4302 4307 4322 4360 4369 4373 4381-4383 4388 4410 4421-4422 4439 4457 4460 4469 4488-4489 4491 4494 4516 4519-4521 4534 4540 4550 4552 4577 4603 4691 4816 4870 4880 4891 4928 4937 4955 4957 4966 4988 4990 4992 5011 5075 5078 5082 5086 5100 5124-5125 5165 5183 5192 5198 5241 5245 5282 5394-5395 5415 5423-5424 5429 5469 5492 5513-5514 5635 5639-5640 5647 5664 5680 5701 5724 5769 5773 5799 5801 5824-5825 6478 6484 6489 6500 8269 8282 8291-8292 8296-8297 8299 8314-8315 8317 8339 8341 8343-8344 8350-8351 8357 8363 8367-8368 8391 8393 8395 8418 8435 8438-8439 8451 8453 8469 8479 8492 8498 8507 8521 8547 8552 8557-8558 8562 8576 8641 8654 8661 8665 8685 8688 8698 8701-8702 8705 8724 8729 8737 8742-8743 8750 8752 8754 8759 8763 8775 8839 8843-8844 8865 8877 8883 8890-8891 8913 8922 8925 8927 8946 8948 9026 9052 9098 9104 9121 9126 9132 9136 9207 9219 9235 9256 9287 9305 9328 9368 9374 9417 9424 9429 9435 9441 9443 9446 9450 9464 9470 9624 9632 9818 9825 9828 9830 9882-9883 9885 9889 9891 9922 9987 10282 10293 10304 10317 10319 10342 10350 10363-10364 10380 10382 10394 10396-10397 10400 10411 10417 10431-10432 10440 10442 10456 10471 10475 10520 10531 10544 10551 10560 10588 10594 10627-10629 10637 10674 10760-10761 10775 10894 10896 10905 10912 10925 26454 26463 26472 26474 26486 26495 26563 26584 26594 26596 26615 27469 27471 27483 27513 27515 27560 27565 27576-27577 27580 27586 27590 27595 27608 27618 27634 27735-27736 27738 27752 27755 27760 27765 27770 27800 27803 27805 27814 27855 27859-27860 27868 27871 27874 27885 27893 27895 27900 27906 27924 27931 27951 27967 27973 27998 28035 28048 28064 28067 28075 28123 28143 28146 28152 28155 28168 28171 28173 28221 28228 28230 28251 28253 28256 28262-28263 28265 28269 28272 28275 28278 28282 28291 28294-28295 28303 28305 28321 28346 28365 28371 28375 28377 28385 28409 28413-28414 28417 28422 28436 28444 28449 28458 28463-28464 28471 28476 28488 28492 28494 28501 28513 28515 28517 28522-28523 28526 28548 28554-28555 28586 28596-28597 28601 28605 28607 28611 28613 28617 28637 28644 28661 31487 31551 31638 31676 31715 31718 31720 32447 32482https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/113/483?format=asciiOpticaldefaultJ/AJ/113/483/table1List of the values of group parameters for d{rho}/{rho}=80 and V_0_=350km/srecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification of groupmeta.id;pos.lgintNmembNumber of membersmeta.numberintRA1950Mean right ascension 1950pos.eq.ra;meta.mainDE1950Mean declination 1950pos.eq.dec;meta.mainczMean redshift of memberskm/ssrc.redshift;stat.meaninte_czVelocity dispersionkm/sstat.errorintlog(L)Log of total luminositylog(solLum)phys.luminosityfloatRhVirial radiusMpcphys.size.radiusfloatt(cr)Crossing time (in units of Hubble time)time.crossingfloatlog(M)Log of virial masslog(solMass)phys.massfloatlog(M/L)Log of mass-to-light ratiolog(Sun)phys.composition.massLightRatiofloat_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexed