J/AJ/106/530ivo://CDS.VizieR/J/AJ/106/530doi:10.26093/cds/vizier.51060530CDSBOTHUN G.D.SCHOMBERT J.M.IMPEY C.D.SPRAYBERRY D.MCGAUGH S.S.2023-04-06T16:50:05Z1997-12-09T20:14:23ZCDS support team

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

cds-question@unistra.frgalaxiesvisible-astronomyredshiftedWe use a sample of approximately 340 low surface brightness (LSB) disk galaxies with measured redshifts in combination with the Center for Astrophysics redshift survey to test the hypothesis that LSB galaxies have a deficit of nearby companion galaxies compared to high surface brightness (HSB) disk galaxies. We find a very strong statistical deficit of galaxies located within a projected radius of 0.5 Mpc and within a velocity of 500 km/s around LSB disk galaxies compared to HSB ones. Further, comparing LSB and HSB disk galaxies which are located in the same portion of the sky indicates that the average distance to the nearest neighbor is 1.7 times farther for LSB disk galaxies. A Komologorov-Smirnoff test rules out, at greater than the 99% confidence level, the hypothesis that the distribution of nearest-neighbor distances is the same for HSB and LSB disk galaxies. We speculate that LSB disk galaxies have relatively long formation time scales and therefore must form in relative isolation. In addition, the lack of tidal interactions over a Hubble time serves to suppress the overall star-formation rate as no external trigger is available to help clump the gas. The observed low surface densities of HI in combination with the low probability of tidal interactions effectively prevents these disk galaxies from evolving very rapidly.1993AJ....106..530Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/106/530CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/106/530https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/106/530http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/106/530https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/106/530https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/106/530http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/106/530GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/106/530/table4 (The most isolated LSB galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/106/530/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/106/530/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/106/530/table4?GETtext/xml+votable180.050000true54.7317622.3770440.005555555555555556Cone search capability for table J/AJ/106/530/table5 (The most popular LSB galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/106/530/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/106/530/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/106/530/table5?GETtext/xml+votable180.050000true6.9466612.6396050.0055555555555555566/177 574 665 701 4259 4265 4803 4813 4829 5002 5123 5129 5131 8383 8557 8719 8827 12366 12458 12550 12609 17767 17778 17782 17850 18010 18012 18014 18103 18188 18326 18348 18416 18426 18777 18789-18790 18793 18803 18822 18880 19361 19436 19489 19637 19888 19944 19984 19987 20005 23138 23242 25947 26032 26264 26286 26460 26869 27049 27274 27279 27317 27398 27610 27618 27636 28059 28076 28107 28256https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/106/530?format=asciiOpticaldefaultJ/AJ/106/530/table1Summary of CountsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSampleSample designationmeta.id;meta.maincharVrangeVelocity rangekm/sphys.veloc;instr.bandwidthcharRadProjProjected radius out to which the counts were madeMpcphys.size.radiusfloatNgalNumber of galaxies forming the sample meanmeta.numberintNrej[]? Number of rejected galaxiesmeta.numberintnullable<N>Sample mean. In general, mean quantities are calculated after one cycle of 2.5 sigma projection.stat.stdevfloate_<N>rms uncertainty in sample mean.stat.errorfloatJ/AJ/106/530/table2*Difference in mean countsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSampleSample designationmeta.id;meta.maincharVrangeVelocity rangekm/sphys.veloc;instr.bandwidthcharPOSS5[]? POSS comparison at 0.5 Mpc radiusstat.fit.paramfloatnullablePOSS5B[]? POSS at 0.5 Mpc obtained by considering subset B in comparison to the POSS HSB samplestat.fit.paramfloatnullablePOSS10[]? POSS comparison at 1.0 Mpc radiusstat.fit.paramfloatnullablePOSS10B[]? POSS at 1.0 Mpc considering subset Bstat.fit.paramfloatnullablePOSS15[]? POSS comparison at 1.5 Mpc radiusstat.fit.paramfloatnullablePOSS15B[]? POSS at 1.5 Mpc considering subset Bstat.fit.paramfloatnullablePOSS20[]? POSS comparison at 2.0 Mpc radiusstat.fit.paramfloatnullablePOSS20B[]? POSS at 2.0 Mpc considering subset Bstat.fit.paramfloatnullableAPM5[]? APM comparison at 0.5 Mpc radiusstat.fit.paramfloatnullableAPM10[]? APM comparison at 1.0 Mpc radiusstat.fit.paramfloatnullableAPM15[]? APM comparison at 1.5 Mpc radiusstat.fit.paramfloatnullableAPM20[]? APM comparison at 2.0 Mpc radiusstat.fit.paramfloatnullableJ/AJ/106/530/table3Nearest-neighbor summaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSampleSample designationmeta.id;meta.maincharNgalNumber of galaxies which have at least one companion within a projected radius of 2.0 Mpcmeta.numberintVrangeVelocity rangekm/sphys.veloc;instr.bandwidthcharDistMean projected distance to the nearest companionMpcpos.distancefloate_Distrms uncertainty on mean projected distanceMpcstat.errorfloatDmaxPOSS[]? KS statistic, Dmax, for the POSS samplemeta.codefloatnullablecl_DmaxPOSS[]? Confidence level that Dmax exceedsstat.fit.paramintnullableDamxAPN[]? KS statistic, Dmax, for the APM samplemeta.codefloatnullablecl_DmaxAPM[]? Confidence level that Dmax exceedsstat.fit.paramintnullableJ/AJ/106/530/table4The most isolated LSB galaxiesNameGalaxy namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSampleSample designation (POSS or APM)meta.idcharRA1950Right ascension 1950pos.eq.ra;meta.mainDE1950Declination 1950pos.eq.dec;meta.mainVelVelocitykm/sphys.veloc;pos.heliocentricintComCommentsmeta.notechar_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.decnullableindexedJ/AJ/106/530/table5The most popular LSB galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharSampleSample designation (POSS or APM)meta.idcharRA1950Right ascension 1950pos.eq.ra;meta.mainDE1950Declination 1950pos.eq.dec;meta.mainVelVelocitykm/sphys.veloc;pos.heliocentricintBrightGalName of the brightest galaxy within 2 Mpc or a known structure near the galaxymeta.idcharComCommentsmeta.notechar_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