J/MNRAS/522/5655ivo://CDS.VizieR/J/MNRAS/522/5655CDSGonzalez E.J.Rodriguez F.Navarro-girones D.Gaztanaga E.Siudek M.,Garcia Lambas D.O'Mill A.L.Renard P.Cabayol L.Carretero J.,Casas R.De Vicente J.Eriksen M.Fernandez E.Garcia-Bellido J.,Hildebrandt H.Miquel R.Padilla C.Sanchez E.Sevilla-Noarbe I.,Tallada-Crespi P.Wittje A.2026-09-04T09:16:30Z2026-09-04T09:53:11ZCDS support team

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

cds-question@unistra.frgalaxiesinteracting-galaxiesphotometryvisible-astronomyredshiftedGalaxy pairs constitute the initial building blocks of galaxy evolution, which is driven through merger events and interactions. Thus, the analysis of these systems can be valuable in understanding galaxy evolution and studying structure formation. In this work, we present a new publicly available catalogue of close galaxy pairs identified using photometric redshifts provided by the Physics of the Accelerating Universe Survey (PAUS). To efficiently detect them, we take advantage of the high-precision photo-z ({sigma}68 < 0.02) and apply an identification algorithm previously tested using simulated data. This algorithm considers the projected distance between the galaxies (rp < 50 kpc), the projected velocity difference ({Delta}V < 3500 km/s) and an isolation criterion to obtain the pair sample. We applied this technique to the total sample of galaxies provided by PAUS and to a subset with high-quality redshift estimates. Finally, the most relevant result we achieved was determining the mean mass for several subsets of galaxy pairs selected according to their total luminosity, colour, and redshift, using galaxy-galaxy lensing estimates. For pairs selected from the total sample of PAUS with a mean r-band luminosity 10^10.6^ h^-2^ L_{sun}_, we obtain a mean mass of M_200_ = 10^12.2^ h^-1^ M_{sun}_, compatible with the mass-luminosity ratio derived for elliptical galaxies. We also study the mass-to-light ratio M/L as a function of the luminosity L and find a lower M/L (or steeper slope with L) for pairs than the one extrapolated from the measurements in groups and galaxy clusters.2023MNRAS.522.5655Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/522/5655CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/513/439 : GAMA DR4 spectrum catalog (Driver+, 2022)J/MNRAS/483/529 : Star-galaxy multi narrow-band classificationJ/A+A/622/A103 : Python Code Investigating GALaxy EmissionJ/ApJ/569/720 : Mass-to-light ratio of galaxy systems (Girardi+, 2002)J/AJ/132/926 : Galaxies in the Hubble Ultra Deep Field (Coe+, 2006)J/AJ/129/682 : Structural properties of S+S galaxiesJ/other/AstBu/73.310 : Isolated galaxy pair limited to M<=-18.5 (Nottale+,2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/522/5655https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/522/5655http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/522/5655https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/522/5655https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/522/5655http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/522/5655GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/522/5655/pau (*The close galaxy pairs identified using CFHTLens photometry and PAUS BCNz2 photometric redshifts including the fields W1 and W3)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/522/5655/pau?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/522/5655/pau?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/522/5655/pau?GETtext/xml+votable180.050000true34.18831306-5.856590.0055555555555555565/2687 2851 2856-2858 4421-4422 6/10741-10743 10745 10747 11093 11398 11401-11403 11416 11418-11419 11436 11440 11442 11776 17677-17679 17681-17683 17692 17700-17701 17703 17712 36798https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/522/5655?format=asciiOpticaldefaultJ/MNRAS/522/5655/pau*The close galaxy pairs identified using CFHTLens photometry and PAUS BCNz2 photometric redshifts including the fields W1 and W3recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDPair id number (pair_id)meta.id;meta.mainintRAJ2000Right ascenction of the brightest pair component (J2000) (ra_1)degpos.eq.ra;meta.mainDEJ2000Declination of the brightest pair component (J2000) (dec_1)degpos.eq.dec;meta.mainzph1Photometric redshift of the brightest component (zphot_1)src.redshift.photfloati1magi-band apparent magnitude for the brightest component (mag_i_1)magphot.mag;em.opt.Idoubler1magr-band apparent magnitude for the brightest component (mag_r_1)magphot.mag;em.opt.RdoubleRA2degRight ascenction of the faintest pair component (J2000) (ra_2)degpos.eq.raDE2degDeclination of the faintest pair component (J2000) (dec_2)degpos.eq.deczph2Photometric redshift of the faintest component (zphot_2)src.redshift.photfloati2magi-band apparent magnitude for the brightest component (mag_i_2)magphot.mag;em.opt.Idoubler2magr-band apparent magnitude for the brightest component (mag_r_2)magphot.mag;em.opt.Rdoublef_IDGalaxy sample from which the pairs were identified as 0 for Total 2283 times and 1 for Gold 1117 times (sample)meta.codeintAssosDisplay the associated HELP dr1 VizieR catalogsmeta.ref.urlchar