J/A+A/568/A46ivo://CDS.VizieR/J/A+A/568/A46doi:10.26093/cds/vizier.35680046CDSEinasto M.Tago E.Lietzen H.Park C.Heinamaki P.Saar E.Song H.,Liivamaki L.J.Einasto J.2015-01-18T13:41:01Z2014-08-12T09:16:18ZCDS support team

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

cds-question@unistra.frquasarsredshiftedvisible-astronomysloan-photometryTo understand the formation, evolution, and present-day properties of the cosmic web we need to study it at low and high redshifts. We trace the cosmic web at redshifts 1.0<z<1.8 using the quasar (QSO) data from in the SDSS DR7 QSO catalogue. We apply a friend-of-friend (FoF) algorithm to the quasar and random catalogues to determine systems at a series of linking length, and analyse richness and sizes of these systems. At the linking lengths l<=30Mpc/h, the number of quasar systems is larger than the number of systems detected in random catalogues, and the systems themselves have smaller diameters than random systems. The diameters of quasar systems are comparable to the sizes of poor galaxy superclusters in the local Universe. The richest quasar systems have four members. The mean space density of quasar systems is close to the mean space density of local rich superclusters. At intermediate linking lengths (40<=l<=70Mpc/h), the richness and length of quasar systems are similar to those derived from random catalogues. Quasar system diameters are similar to the sizes of rich superclusters and supercluster chains in the local Universe. The percolating system, which penetrate the whole sample volume appears in a quasar sample at a smaller linking length than in random samples (85Mpc/h). At the linking length 70Mpc/h, the richest systems of quasars have diameters exceeding 500Mpc. Quasar luminosities in systems are not correlated with the system richness. Quasar system catalogues in our web pages and at the Strasbourg Astronomical Data Center (CDS) serve as a database for searching for superclusters of galaxies and for tracing the cosmic web at high redshifts.2014A&A...568A..46Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/568/A46CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)J/A+AS/123/119 : The supercluster-void network. I. (Einasto+ 1997)J/A+A/540/A123 : Galaxy clusters from SDSS DR8 (Einasto+, 2012)J/A+A/542/A36 : Rich clusters from SDSS DR8 (Einasto+, 2012)J/A+A/566/A1 : Flux- & volume-limited groups for SDSS galaxies (Tempel+ 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/568/A46https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/568/A46http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/568/A46https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/568/A46https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/568/A46http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/568/A46GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/568/A46/qsos (All quasars and their parent system at linking lengths of 20, 30, 40, 50, 60, 70 and 80Mpc)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/568/A46/qsos?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/568/A46/qsos?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/568/A46/qsos?GETtext/xml+votable180.050000true115.0674669439.38112250.005555555555555556Cone search capability for table J/A+A/568/A46/qso20fof (Quasar system table at linking length 20Mpc)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/568/A46/qso20fof?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/568/A46/qso20fof?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/568/A46/qso20fof?GETtext/xml+votable180.050000true115.0980830639.368278890.005555555555555556Cone search capability for table J/A+A/568/A46/qso30fof (Quasar system table at linking length 30Mpc)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/568/A46/qso30fof?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/568/A46/qso30fof?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/568/A46/qso30fof?GETtext/xml+votable180.050000true115.0333019429.835066110.005555555555555556Cone search capability for table J/A+A/568/A46/qso40fof (Quasar system table at linking length 40Mpc)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/568/A46/qso40fof?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/568/A46/qso40fof?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/568/A46/qso40fof?GETtext/xml+votable180.050000true113.5618819437.192116110.005555555555555556Cone search capability for table J/A+A/568/A46/qso50fof (Quasar system table at linking length 50Mpc)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/568/A46/qso50fof?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/568/A46/qso50fof?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/568/A46/qso50fof?GETtext/xml+votable180.050000true113.5618819437.192116110.005555555555555556Cone search capability for table J/A+A/568/A46/qso60fof (Quasar system table at linking length 60Mpc)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/568/A46/qso60fof?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/568/A46/qso60fof?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/568/A46/qso60fof?GETtext/xml+votable180.050000true113.5618819437.192116110.005555555555555556Cone search capability for table J/A+A/568/A46/qso70fof (Quasar system table at linking length 70Mpc)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/568/A46/qso70fof?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/568/A46/qso70fof?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/568/A46/qso70fof?GETtext/xml+votable180.050000true113.5618819437.192116110.005555555555555556Cone search capability for table J/A+A/568/A46/qso80fof (Quasar system table at linking length 80Mpc)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/568/A46/qso80fof?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/568/A46/qso80fof?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/568/A46/qso80fof?GETtext/xml+votable180.050000true113.5618819437.192116110.0055555555555555563/85 131 162-163 174 407 413 447 4/257 261 263 265 269-272 274-275 277 279 281 283 285-287 293 295 301 304-305 308-309 311 313-317 320-321 329-334 337-338 346 348-349 352-353 356 360-362 367-370 372 375 377-378 380-382 389 401-403 407 448-449 451-453 455 512 515 520 522 535 537-538 540 544 550-552 556 558-559 563 565 567-568 570 572 575 579 583 585 587-588 590-591 600 602 610-613 615-616 619 640 642-643 645-647 656-658 660-661 663 665 667-668 671 674 678-680 682 684-686 691-692 694-695 703-705 707-708 710 712 714 716 737-739 744 1627 1643 1647 1651 1660 1662 1694-1695 1703 1711 1713-1715 1717 1722-1723 1725 1730 1732-1733 1738-1739 1741-1743 1747 1749 1751 1755-1757 1761-1762 1764-1765 1767-1770 1773 1777 1779 1783 1785 1787 1978 5/1026-1027 1032-1033 1035 1037-1039 1041-1043 1048-1050 1057 1068-1069 1071-1072 1074-1075 1092 1094 1104-1106 1112 1114-1115 1120 1122-1123 1131 1137-1139 1157 1169 1176-1177 1179 1201 1203 1209 1211-1212 1214-1215 1224 1226-1229 1240-1241 1243 1248 1250-1251 1273-1275 1277-1279 1290-1291 1293 1295 1297-1298 1301-1304 1307 1309 1311-1314 1340 1342-1343 1345-1347 1357-1359 1376 1378-1379 1381-1383 1389-1391 1403-1404 1406-1407 1416-1418 1420-1421 1423 1428 1430 1432-1434 1437-1439 1452-1454 1458-1461 1463-1466 1484-1485 1487 1492-1493 1495 1497-1499 1504-1505 1507 1516-1517 1532 1534-1535 1553 1555 1561 1563-1566 1588 1601-1603 1616-1618 1620-1622 1624 1626-1627 1632 1634-1635 1637-1639 1648-1649 1651-1653 1655 1800 1802-1803 1816-1818 1824-1825 1828-1829 1841 1856-1857 1860-1861 1863-1865 1867 1870 1872-1873 1875-1877 1880 2054-2056 2058-2059 2064-2066 2068 2070 2072-2073 2075 2077-2079 2085-2087 2092-2094 2112-2114 2116 2118 2121 2123-2126 2130-2131 2134-2137 2144 2146-2147 2156-2157 2159 2164 2166-2168 2170-2173 2175 2180-2181 2183-2185 2188-2189 2192-2193 2195-2197 2199 2213-2214 2216-2217 2219-2222 2229-2231 2240-2242 2244-2245 2247-2249 2256-2257 2259 2264-2265 2276-2278 2284-2286 2292-2293 2295-2298 2306 2310 2313 2327 2329-2331 2336-2338 2345 2347 2356 2359 2378 2433-2438 2456 2468-2470 2473-2475 2480-2482 2484-2485 2487-2490 2492 2494 2496 2498 2504 2564-2565 2576 2578-2579 2636-2638 2648 2650 2656 2658-2659 2666-2667 2677-2682 2688 2691-2693 2695 2701-2704 2707-2708 2710-2711 2724 2726 2734 2749-2751 2753-2755 2757-2759 2761-2763 2773-2775 2801-2804 2806-2809 2811 2824-2825 2827 2836-2838 2844 2846 2852-2853 2855 2860 2862-2863 2868 2872 2874-2875 2944-2945 2947 2962 2980-2981 2984 2986 5462-5463 6487 6489 6491 6494-6495 6501-6502 6505 6507 6549 6551 6555 6557-6558 6565-6567 6569 6571 6577 6579-6582 6584 6586-6587 6593-6598 6601-6602 6624-6625 6627 6629 6631-6632 6634-6635 6637-6639 6644 6646 6652-6654 6742-6743 6747-6748 6750-6751 6757 6759 6762-6766 6769 6771-6772 6774-6775 6807 6821 6823 6825 6828-6829 6833-6834 6836-6837 6839-6841 6843 6848-6849 6851 6864-6866 6872 6874-6875 6877-6880 6882 6884-6886 6898-6899 6904-6905 6907 6909 6912 6914-6917 6919 6924 6926-6927 6937-6941 6945-6948 6950-6951 6961 6963 6976-6977 6981 6983-6985 6987 6993 6995 7000-7001 7003 7009 7011-7014 7016-7017 7019 7032-7033 7035 7037-7040 7042 7052-7054 7064 7066-7067 7084 7086-7089 7091 7096-7097 7099 7101-7104 7106-7107 7113-7115 7120-7121 7123-7124 7126-7128 7130-7131 7136-7138 7144-7145 7147 7847 7849-7852 7854-7855 7858-7860 7862-7865 7868-7870 6/4097-4101 4103 4136-4138 4145 4147 4160 4162-4163 4205-4207 4224-4225 4227 4236-4237 4239 4280-4281 4283 4292 4294-4295 4372-4374 4381 4383 4428-4429 4431 4453-4455 4485-4487 4512 4514-4516 4518-4519 4521-4523 4544 4546-4547 4637 4639 4661 4673-4675 4680-4681 4683 4685-4687 4713-4715 4801 4803 4809 4833 4843 4852-4853 4855 4900 4902-4903 4920-4921 4923-4926 4968 4970-4971 4997-4999 5089-5091 5104-5105 5107 5152-5154 5156-5157 5159 5168-5169 5171 5176 5178 5184 5186-5187 5196-5198 5200-5202 5220-5222 5224-5226 5232-5233 5235 5240-5241 5243 5260-5261 5263 5364-5366 5377-5379 5425-5427 5508-5510 5520-5521 5552-5554 5601-5605 5607-5609 5611 5621-5623 5677-5678 5688-5690 5716-5717 5719 5724-5725 5727 5740 5742-5745 5747 5820-5822 5825-5829 5831 5848-5849 5851 5868-5870 5945-5947 5976-5978 5984-5985 6024-6025 6072-6073 6075-6077 6079 6132 6134-6135 6217 6243 6249 6251 6268 6270-6271 6337 6340-6341 6356-6357 6359 6363 6365-6367 6385 6388-6389 6401-6403 6476 6478-6479 6492-6494 6501-6503 6532-6534 6544-6545 6547 6560-6561 6564-6565 6576-6577 6580 6600-6601 6603 6616-6618 7204-7205 7207 7277-7279 7304-7305 7308-7309 7321 7324 7362-7363 7376-7377 7379 7381 7432-7434 7436 7438-7439 7448-7449 7451 7464-7466 7472-7474 7477-7479 7484-7485 7496 7498 7512 7514-7516 7524-7526 7552-7553 8208 8210 8212 8214-8215 8229-8231 8268-8269 8271 8276 8278-8279 8284-8286 8296 8298-8299 8304 8306-8307 8336-8337 8339 8380-8382 8460 8462-8463 8468-8469 8471 8476-8477 8479 8481-8483 8489-8491 8509-8514 8517-8519 8530-8531 8534-8535 8553-8554 8556-8557 8580 8582-8583 8633-8635 8660 8662-8663 8676 8678 8696-8697 8728 8730-8731 8744 8746-8750 8760-8762 8764-8766 8776 8778-8779 8792-8793 8850-8851 8861-8863 8872 8874-8875 8892-8893 8895 8912-8914 8972 8974-8975 8984-8986 9000-9002 9005-9007 9032-9033 9035 9064-9066 9068 9070-9071 9116 9118-9119 9151 9176-9178 9196-9198 9230-9231 9246-9249 9251 9256-9258 9260 9263 9290-9292 9294 9303 9307 9312-9314 9356-9357 9359 9377-9379 9384-9385 9387 9428 9430-9432 9434-9435 9473-9475 9478 9481-9484 9486 9504-9505 9507-9508 9510-9511 9516-9517 9519 9648 9728-9730 9756-9758 9828 9830-9834 9836 9838-9839 9885-9889 9891 9932-9934 9944-9946 9964 9966-9967 9973-9975 9981-9983 9988 9990 9996 9998 10022 10024-10025 10027 10112-10114 10120 10122 10144 10146 10265-10270 10308-10310 10556-10558 10596-10597 10599 10605-10607 10628-10630 10656 10658-10659 10661-10663 10704-10706 10732 10734 10756 10758-10759 10761-10763 10776 10778-10779 10801-10803 10820 10822-10823 10825-10827 10836-10837 10839 10900 10902-10903 10908 10910-10911 10928-10929 10931-10932 10934-10935 10940-10941 10943 10993-10995 11008-11009 11011 11024-11025 11027 11041-11043 11088-11090 11200-11202 11220 11222-11223 11241 11243 11356 11358 11380 11388 11390 11416-11417 11419 11444-11446 11480-11482 11493-11495 11504 11506 11512 11784 11786-11787 11840-11842 11844 11846 11852 11854 11872-11874 11876 11880 11882 11928-11929 11931-11932 11940 11942-11943 11948 11952 21845-21847 21873 21876 21878-21879 21885 25599 25855 25941-25943 25945-25947 25955 25961-25963 25968-25969 25971-25972 25974-25975 25999 26003 26012-26013 26015 26025-26026 26175 26200-26202 26211 26213-26215 26217-26219 26224-26225 26227 26236-26237 26239 26255 26283 26304-26305 26307 26313-26315 26332-26334 26340-26342 26368-26369 26371 26397-26401 26412-26413 26415 26504-26506 26513-26515 26520 26522-26523 26532-26533 26535 26544 26546-26547 26581-26583 26588-26589 26591 26620-26622 26943 26959 26964 26966-26967 26979 26981-26983 26985-26987 26996-26997 26999 27033-27035 27043 27045-27047 27068-27070 27072 27074-27075 27080-27082 27092 27094-27095 27215 27219-27220 27222-27223 27225-27227 27238-27242 27245 27247 27283 27289-27291 27305-27310 27320-27321 27323-27326 27329 27331 27341-27343 27353-27355 27368 27370-27371 27401-27403 27468 27470-27471 27493-27495 27504-27505 27507 27524 27526-27527 27532-27534 27548-27550 27584 27586-27587 27589-27591 27625-27627 27632-27634 27641-27643 27645 27647 27652-27654 27672 27674-27675 27700-27702 27745-27747 27768-27770 27772-27773 27775 27777-27779 27796 27798-27799 27841-27843 27848-27849 27851 27912-27913 27915-27916 27918-27919 27921-27923 27928 27930-27931 27945-27947 27968 27970-27971 27976 27978 28009-28011 28033-28035 28041-28043 28060-28062 28072-28074 28137-28139 28145-28147 28164 28166-28167 28172 28174-28175 28220-28222 28260-28261 28263 28341-28343 28360 28362-28363 28392-28394 28400-28401 28403 28421 28448-28449 28451 28488 28490-28491 28501-28503 28516 28518-28519 28556-28557 28559 28584-28585 28587 31295 31337 31339 31375 31381-31383 31385 31387 31412-31414 31424 31426-31427 31429-31431 31446 31464 31466-31468 31470-31471 31484-31486 31624 31626 31666 31672-31674 31676 31678 31722-31723 40959 45055https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/568/A46?format=asciiOpticaldefaultJ/A+A/568/A46/qsosAll quasars and their parent system at linking lengths of 20, 30, 40, 50, 60, 70 and 80MpcBestSDSS-DR7 BestObjIDmeta.idIDqso[61/25011] ID of quasar (our list number)meta.id;meta.mainintprimaryindexedIDsys[0/4536] ID of quasar systemmeta.id.parentintNqso[1/920] Number of quasars in the systemmeta.numberintNsysNumber of different parent clusters this QSO is involvedmeta.numberintLLLinking length used in friend-of-friends algorithm (20, 30, 40, 50, 60, 70 or 80Mpc)Mpcstat.paramintnullableprimaryRAJ2000Right ascension of a quasar (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of a quasar (J2000)degpos.eq.dec;meta.mainlambda[-55/55] SDSS Survey coordinate of a quasardegpos.framedoubleeta[-33/35] SDSS Survey coordinate of a quasardegpos.framedoublezqso[1/1.8] Redshift of a quasarsrc.redshift;pos.heliocentricfloatimagi-magnitude of quasarmagphot.mag;em.opt.IfloatSpecSDSS-DR7 SpecObjIDmeta.idSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharJ/A+A/568/A46/qso20fofQuasar system table at linking length 20MpcIDsys[1/4536] ID of quasar systemmeta.id;meta.mainintprimaryNqso[2/920] Number of quasars in the systemmeta.numberintRAJ2000Right ascension of the system centre (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of the system centre (J2000)degpos.eq.dec;meta.mainlambdaSDSS Survey coordinate of the system centredegpos.framedoubleetaSDSS Survey coordinate of the system centredegpos.framedoubleDistCo-moving distance of a system centre (1)Mpcpos.distancedoubleDiam[1/2067] Diameter of a system (1)Mpcphys.size.diameterdoubleJ/A+A/568/A46/qso30fofQuasar system table at linking length 30MpcIDsys[1/4536] ID of quasar systemmeta.id;meta.mainintprimaryNqso[2/920] Number of quasars in the systemmeta.numberintRAJ2000Right ascension of the system centre (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of the system centre (J2000)degpos.eq.dec;meta.mainlambdaSDSS Survey coordinate of the system centredegpos.framedoubleetaSDSS Survey coordinate of the system centredegpos.framedoubleDistCo-moving distance of a system centre (1)Mpcpos.distancedoubleDiam[1/2067] Diameter of a system (1)Mpcphys.size.diameterdoubleJ/A+A/568/A46/qso40fofQuasar system table at linking length 40MpcIDsys[1/4536] ID of quasar systemmeta.id;meta.mainintprimaryNqso[2/920] Number of quasars in the systemmeta.numberintRAJ2000Right ascension of the system centre (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of the system centre (J2000)degpos.eq.dec;meta.mainlambdaSDSS Survey coordinate of the system centredegpos.framedoubleetaSDSS Survey coordinate of the system centredegpos.framedoubleDistCo-moving distance of a system centre (1)Mpcpos.distancedoubleDiam[1/2067] Diameter of a system (1)Mpcphys.size.diameterdoubleJ/A+A/568/A46/qso50fofQuasar system table at linking length 50MpcIDsys[1/4536] ID of quasar systemmeta.id;meta.mainintprimaryNqso[2/920] Number of quasars in the systemmeta.numberintRAJ2000Right ascension of the system centre (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of the system centre (J2000)degpos.eq.dec;meta.mainlambdaSDSS Survey coordinate of the system centredegpos.framedoubleetaSDSS Survey coordinate of the system centredegpos.framedoubleDistCo-moving distance of a system centre (1)Mpcpos.distancedoubleDiam[1/2067] Diameter of a system (1)Mpcphys.size.diameterdoubleJ/A+A/568/A46/qso60fofQuasar system table at linking length 60MpcIDsys[1/4536] ID of quasar systemmeta.id;meta.mainintprimaryNqso[2/920] Number of quasars in the systemmeta.numberintRAJ2000Right ascension of the system centre (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of the system centre (J2000)degpos.eq.dec;meta.mainlambdaSDSS Survey coordinate of the system centredegpos.framedoubleetaSDSS Survey coordinate of the system centredegpos.framedoubleDistCo-moving distance of a system centre (1)Mpcpos.distancedoubleDiam[1/2067] Diameter of a system (1)Mpcphys.size.diameterdoubleJ/A+A/568/A46/qso70fofQuasar system table at linking length 70MpcIDsys[1/4536] ID of quasar systemmeta.id;meta.mainintprimaryNqso[2/920] Number of quasars in the systemmeta.numberintRAJ2000Right ascension of the system centre (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of the system centre (J2000)degpos.eq.dec;meta.mainlambdaSDSS Survey coordinate of the system centredegpos.framedoubleetaSDSS Survey coordinate of the system centredegpos.framedoubleDistCo-moving distance of a system centre (1)Mpcpos.distancedoubleDiam[1/2067] Diameter of a system (1)Mpcphys.size.diameterdoubleJ/A+A/568/A46/qso80fofQuasar system table at linking length 80MpcIDsys[1/4536] ID of quasar systemmeta.id;meta.mainintprimaryNqso[2/920] Number of quasars in the systemmeta.numberintRAJ2000Right ascension of the system centre (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of the system centre (J2000)degpos.eq.dec;meta.mainlambdaSDSS Survey coordinate of the system centredegpos.framedoubleetaSDSS Survey coordinate of the system centredegpos.framedoubleDistCo-moving distance of a system centre (1)Mpcpos.distancedoubleDiam[1/2067] Diameter of a system (1)Mpcphys.size.diameterdouble