On the nature of small galaxy systems J/MNRAS/481/2458 ivo://CDS.VizieR/J/MNRAS/481/2458 doi:10.26093/cds/vizier.74812458 CDS Duplancic F. Coldwell G.V. Alonso S. Lambas D.G. 2024-08-18T20:21:43Z 2021-04-13T08:50:32Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr galaxies catalogs surveys visible-astronomy sloan-photometry redshifted We aim at defining homogeneous selection criteria of small galaxy systems in order to build catalogues suitable to compare main properties of pairs, triplets, and groups with four or more members. To this end we use spectroscopic and photometric Sloan Digital Sky Survey (SDSS) data to identify systems with a low number of members. We study global properties of these systems and the properties of their member galaxies finding that galaxies in groups are systematically redder and with lower star formation activity indicators than galaxies in pairs which have a higher fraction of star-forming galaxies. Triplet galaxies present intermediate trends between pairs and groups. We also find an enhancement of star formation activity for galaxies in small systems with companions closer than 100kpc, irrespective of the number of members. We have tested these analyses on SDSS mock catalogues derived from the Millennium simulation, finding as conservative thresholds 76 per cent completeness and a contamination of 23 per cent in small galaxy systems, when considering an extreme case of incompleteness due to fiber collisions. Nevertheless, we also found that the results obtained are not likely affected by projection effects. Our studies suggest that an extra galaxy in a system modify the properties of the member galaxies. In pairs, galaxy-galaxy interactions increase gas density and trigger starbursts. However, repeated interactions in triplets and groups can generate gas stripping, turbulence, and shocks quenching the star formation in these systems. 2018MNRAS.481.2458D https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/481/2458 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015) http://www.sdss.org/ : SDSS home page https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/481/2458 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/481/2458 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/481/2458 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/481/2458 https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/481/2458 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/481/2458 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/MNRAS/481/2458/tablea1 (Main properties of small galaxy systems) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/481/2458/tablea1? https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/481/2458/tablea1? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/481/2458/tablea1? GET text/xml+votable 180.0 50000 true 219.75091 -0.83298 0.005555555555555556 Cone search capability for table J/MNRAS/481/2458/tablea2 (Galaxy properties of small galaxy systems members) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/481/2458/tablea2? https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/481/2458/tablea2? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/481/2458/tablea2? 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25996 25998 26000 26009 26015-26016 26018-26020 26022 26024 26026 26029 26042 26044 26047-26048 26050 26052 26054-26055 26057 26059-26061 26063-26065 26067-26070 26076-26077 26079 26092-26094 26096 26098-26100 26103 26109-26110 26141 26143 26159 26161-26163 26165-26167 26178-26179 26184 26186-26187 26192-26194 26201-26203 26210-26213 26215-26216 26218 26221 26223 26228 26230-26231 26234 26236-26237 26241-26246 26248 26250-26251 26258 26260-26262 26267 26270-26271 26277-26279 26284-26285 26287-26288 26290-26291 26293-26294 26296 26298 26320 26322 26328 26330-26334 26342-26343 26350-26351 26354-26358 26376 26378-26379 26382-26383 26389-26391 26393-26394 26397-26400 26402-26404 26406-26407 26409-26412 26417-26418 26421 26423-26425 26427 26429-26434 26436-26438 26440-26442 26444-26446 26449-26452 26454-26457 26459 26461-26463 26468-26470 26473-26477 26480-26481 26488-26489 26496-26498 26500 26502-26504 26506-26507 26509-26510 26512 26514-26516 26519-26520 26524-26525 26527 26529-26531 26537 26540 26543 26545-26548 26550 26552-26554 26557 26564 26568-26569 26571 26574-26576 26578-26580 26583-26585 26588-26589 26591 26596 26599 26602-26603 26606 26608-26610 26612-26613 26615 26619 26621-26622 26911 26933 26941-26943 26946-26948 26950-26953 26955-26956 26958-26959 26962-26965 26975-26977 26979 26984 26986-26988 26991 26998-26999 27004-27005 27007 27023 27025-27027 27032 27034-27035 27042-27043 27045-27048 27051 27056-27058 27062-27063 27066 27068-27069 27071 27074 27085-27089 27091-27092 27094-27095 27097 27101 27104 27106-27107 27110 27120 27122 27125-27127 27129 27131 27133 27135 27215 27217-27219 27221 27223-27224 27226-27227 27234 27237-27239 27241-27243 27248 27250-27252 27255 27261-27263 27279 27283 27293-27294 27306 27310-27314 27322 27328 27330-27331 27340-27342 27348 27350-27352 27354 27364 27367-27369 27371 27373 27377 27379 27384 27387 27392-27394 27396-27397 27399-27400 27402-27403 27412 27414 27416-27418 27420 27422 27428-27430 27433 27440 27450-27453 27455-27458 27461-27462 27472 27474-27477 27480 27482-27483 27488-27489 27491 27493 27497-27498 27502 27504-27505 27507 27510-27511 27513-27515 27520-27522 27524-27525 27529-27533 27535 27550-27552 27554 27557-27560 27563 27565-27567 27572-27573 27575-27578 27582 27592-27593 27595 27597-27601 27605-27606 27609-27611 27624 27626 27628 27630-27631 27636 27638-27639 27644-27645 27647-27649 27652-27654 27657-27659 27664 27696 27700-27702 27706 27709 27711-27712 27714-27716 27718-27719 27721-27723 27735-27737 27740 27743 27745 27747 27751 27756 27758-27759 27761 27763 27765-27766 27768 27771-27772 27774-27775 27777-27779 27790-27791 27796-27797 27814-27817 27820 27824-27825 27828 27832-27833 27835-27836 27838-27839 27841-27842 27845 27847-27849 27851-27853 27855 27864-27865 27867 27872 27874-27875 27877-27879 27888 27891 27893 27896-27897 27899-27902 27905 27907-27908 27910 27916 27921 27926 27929-27930 27933 27938 27940-27941 27943-27944 27946 27949-27951 27953 27955-27956 27959 27961-27963 27973-27975 27981-27986 27988-27989 27991 27997-27999 28004-28006 28012-28013 28016-28017 28019-28021 28026 28030-28031 28036 28038-28041 28043-28044 28047-28048 28053-28055 28057-28060 28062 28073-28077 28079-28082 28085-28087 28098-28099 28103-28104 28106 28109 28113 28115 28117-28118 28120 28122-28124 28127 28129-28130 28132-28134 28143-28144 28146 28153 28155 28162-28163 28165 28167-28168 28171 28174 28176 28179 28184 28187 28190 28192-28194 28200-28202 28205-28206 28209-28211 28216 28218-28219 28223-28226 28228-28229 28231 28233-28235 28240 28242-28244 28246 28248-28249 28251 28253-28256 28259 28262 28266-28268 28270-28271 28273 28275-28276 28278-28280 28283 28285-28287 28300 28302-28306 28308 28310-28311 28316-28317 28319 28325 28334-28336 28338-28339 28344-28346 28349-28353 28356 28358-28359 28362-28363 28367-28369 28371 28384-28385 28387-28390 28392-28393 28395-28396 28402 28405-28408 28410-28414 28417-28419 28424-28425 28427 28429 28444-28446 28449-28454 28457-28458 28469-28474 28480-28482 28484 28486-28489 28491-28494 28496-28498 28506-28508 28511-28512 28514-28515 28521-28522 28524 28526-28528 28530-28531 28534 28536 28538-28541 28544-28545 28547 28552 28555-28556 28561-28563 28565 28567-28568 28573 28576-28577 28579 28588 28590-28591 28597-28599 28601 28604 28606-28608 28610-28613 28615-28618 28620 28623-28625 28627 28632-28634 28641-28643 28645 28647 28652 28654-28655 28657-28660 28662-28663 28665-28666 28670-28671 30031 30033-30036 30040 30043-30044 30975 31138 31146 31291-31293 31309 31311 31313 31315 31321-31322 31324-31325 31329-31332 31334 31336-31337 31339 31344 31354-31355 31357 31366 31371 31373-31378 31381-31386 31388-31389 31392 31394-31397 31401-31403 31405-31407 31424-31426 31430 31432 31434-31435 31437 31440 31442 31447 31449-31451 31456-31458 31461 31463-31465 31467 31469 31471 31477-31479 31481-31482 31484 31486-31488 31530-31531 31533-31534 31546-31547 31550-31551 31599 31611 31616 31623-31624 31627 31630 31635-31636 31638-31640 31644 31646-31647 31649-31650 31653-31654 31656-31657 31659-31660 31662-31663 31666-31669 31671-31672 31675-31676 31678-31679 31685-31687 31689 31692-31693 31695-31697 31699 31706 31712 31714 31717-31718 31724 31726-31727 31731 31733 31735 31739 31742 32399 32413-32415 32423 32426-32427 32429 32431-32432 32434-32435 32440-32441 32444-32446 32459 32478 32480-32481 32483-32484 32486 32488 32490 32494-32495 32501-32503 32509-32511 32674 32682 32684 36703 36722-36723 36727-36728 36730 36763 36766 36775 36779 36781-36783 36789-36790 36792 36801 36804-36805 36808 36811 36816 36861 36863 45039 45045 45049 45052 48988-48990 49010-49012 49014-49015 49021-49022 49085-49086 49092-49093 49095 49097 49099-49101 49103 49106 49120-49121 49151 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/481/2458?format=ascii Optical default J/MNRAS/481/2458/tablea1 Main properties of small galaxy systems Simbad Simbad column added by the CDS meta.ref.url char recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int ID System Identifier meta.id;meta.main int RAJ2000 System Centre Right Ascension (J2000) deg pos.eq.ra;meta.main indexed DEJ2000 System Centre Declination (J200) deg pos.eq.dec;meta.main indexed zave Average redshift of the System (1) src.redshift;pos.heliocentric double Nm [2/6] Number of members in the system meta.number int Nspec [1/6] Number of spectroscopic members in the system meta.number int dVmax ? Maximum radial velocity difference (2) km/s phys.veloc;arith.diff double nullable R System radius (3) kpc phys.size.radius double drmag System magnitude difference (4) phot.mag;arith.diff double
J/MNRAS/481/2458/tablea2 Galaxy properties of small galaxy systems members SimbadName Simbad column added by the CDS meta.id char nullable recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int ID System Identifier meta.id;meta.main int idgx [1/6] Galaxy identifier within the system (1) meta.id int Nm [2/6] Number of members in the system meta.number int idsp [0/1] Spectroscopic/photometric flag (2) meta.code char objID SDSS long object identification meta.id RAJ2000 Right Ascension (J2000) deg pos.eq.ra;meta.main indexed DEJ2000 Declination (J2000) deg pos.eq.dec;meta.main indexed z Galaxy redshift (3) src.redshift double rMAG r-band absolute magnitude of the galaxy (4) mag phys.magAbs double Sloan Display the SDSS data for this object meta.ref.url char