SDSS DR16Q QSO pairs with MgII abs. line analysis J/ApJS/265/46 ivo://CDS.VizieR/J/ApJS/265/46 doi:10.26093/cds/vizier.22650046 CDS Chen Z.-F. Qin H.-C. Cai J.-T. Zhou Y.-T. Chen Z.-G. Pang T.-T.,Wang Z.-W. Cheng K.-F. 2023-11-03T11:49:45Z 2023-06-27T11:41:58Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr quasars visible-astronomy spectroscopy redshifted line-intensities surveys We have collected 10025 foreground-background quasar pairs with projected distances d_p_<500kpc from the large quasar catalog of the Sloan Digital Sky Survey DR16Q. We investigate the properties of the MgII absorption lines with W_r_>0.15{AA} around foreground quasars, including both the line of sight (LOS; of foreground quasars) and transverse (TRA; perpendicular to the LOS) absorptions. Both the equivalent width (the correlation coefficient {rho}=-0.915 and the probability P<10^-4^ of no correlation) and incident rate ({rho}=-0.964 and P<10^-6^) of TRA MgII absorption lines are obviously anticorrelated with projected distance. The incident rate of TRA MgII absorption lines is obviously (>4{sigma}) greater than that of LOS MgII absorption lines at projected distances d_p_<200kpc, while the TRA and LOS MgII both have similar (<3{sigma}) incident rates at scales d_p_>200kpc. The anisotropic radiation from quasars would be the most possible interpretation for the anisotropic absorption around quasars. This could also indicate that the quasar radiation is not obviously impacting the gas halos of quasars at scales d_p_>200kpc. 2023ApJS..265...46C https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/265/46 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009) VII/289 : SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020) J/ApJ/651/61 : Opt. thick absorbers near luminous quasars (Hennawi+, 2006) J/ApJ/639/766 : SDSS-DR3 strong MgII absorbers (Prochter+, 2006) J/MNRAS/392/1539 : Metal absorption systems in pairs of QSOs (Tytler+, 2009) J/ApJ/714/1521 : Spectroscopy of galaxies around distant QSOs (Chen+, 2010) J/ApJ/724/L176 : MgII absorbing gas around galaxies (Chen+, 2010) J/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010) J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011) J/ApJ/761/112 : High-z MgII absorption QSOs with FIRE (Matejek+, 2012) J/ApJ/748/131 : MgII absorbers in SDSS-DR7 quasar catalog (Shen+, 2012) J/ApJ/763/37 : Metals in SDSS QSOs. I. 1.5<z<4.5 CIV abs. (Cooksey+, 2013) J/ApJ/776/136 : QPQ VI. HI absorption of z~2 quasars (Prochaska+, 2013) J/ApJ/762/L19 : Quasar pairs spectroscopy (Prochaska+, 2013) J/ApJ/796/140 : Circumgalactic medium around z~2 QSOs (Prochaska+, 2014) J/ApJS/221/32 : Narrow MgII absorption lines from SDSS-DR9Q (Chen+, 2015) J/MNRAS/452/2553 : Sample of foreground-background QSO pairs (Johnson+, 2015) J/MNRAS/462/2980 : BOSS narrow CIV absorption lines. III. (Chen+, 2016) J/ApJ/817/55 : NIR spectroscopy of 1.5<z<3.5 broad-band QSOs (Shen, 2016) J/ApJS/235/11 : Absorption features in SDSS. I. MgII doublets (Chen+, 2018) J/ApJS/239/23 : CIV NAL systems from SDSS-DR14 quasar spectra (Chen+, 2018) J/ApJS/244/36 : QSO properties from SDSS. II. First two years (Chen+, 2019) J/ApJ/887/196 : REQUIEM survey. I. Lya halos around QSOs (Farina+, 2019) J/MNRAS/490/1451 : MUDF data of galaxy groups at 0.5<z<1.5 (Fossati+, 2019) J/ApJ/884/151 : Lyman cont. luminosity of SDSS QSOs at z~3 (Jalan+, 2019) J/ApJS/250/3 : Variable MgII NALs in SDSS DR14 (Chen+, 2020) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/265/46 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/265/46 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/265/46 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/265/46 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/265/46 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/265/46 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJS/265/46/table1 (The properties of the quasar pairs and the line of sight (LOS) MgII absorption lines) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/265/46/table1? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/265/46/table1? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/265/46/table1? GET text/xml+votable 180.0 50000 true 236.3759583 48.7691389 0.005555555555555556 Cone search capability for table J/ApJS/265/46/table2 (The background quasars with transverse (TRA) MgII absorption lines) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/265/46/table2? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/265/46/table2? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/265/46/table2? GET text/xml+votable 180.0 50000 true 236.3993333 48.7871111 0.005555555555555556 4/450 624 676 685 688 690 712-713 1125 1130 5/170 173 521 526 537 550 560 562 643 1147-1148 1173 1181 1186 1197-1198 1200 1208 1212 1215 1223 1234 1236 1243-1244 1246 1250-1251 1253 1263 1267-1268 1270 1279 1283 1305-1306 1308-1310 1313 1320-1321 1323 1326 1329-1331 1335-1336 1338-1342 1355 1357 1362-1364 1367 1369-1371 1373 1375-1376 1379 1381 1383 1389-1392 1396 1398 1400-1402 1404-1406 1411 1414 1421 1423 1426 1428 1431-1432 1434-1435 1439 1442-1443 1445 1449-1450 1457-1459 1461-1462 1464 1466-1467 1469 1472 1475 1478 1480-1481 1484-1485 1488 1490-1492 1495-1496 1499-1502 1508 1510-1511 1528-1529 1540 1554 1559 1565-1567 1589 1599 1602 1605 1607 1609-1611 1615 1617 1622 1625 1632 1634 1648 1651 1653-1655 1658 1661 1795 1797 1804 1806 1808 1813 1815 1818 1820 1822-1823 1826-1827 1830-1831 1833 1835-1836 1840 1843-1844 1856-1857 1864 2287 2294 2297-2298 2303 2327 2335 2349-2350 2353-2355 2358 2360-2361 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18784 18786-18787 18789-18791 18796-18798 18806-18807 18811 18823 18829-18832 18834 18841-18846 18850-18851 18857-18858 18860-18862 18864-18865 18867 18869 18873-18876 18879-18882 18886 18888-18889 18891 18895 18900-18902 18904-18905 18907 18909-18910 18912-18913 18916-18917 18919-18920 18922-18924 18927 18931 19005-19007 19021 19023 19027 19032 19034-19036 19038-19040 19043 19052-19054 19056-19058 19060-19062 19065-19066 19068-19070 19079 19083 19097-19099 19108-19110 19117-19118 19125-19126 19128 19136-19138 19144 19146 19149-19150 19152-19154 19159-19160 19165 19170-19171 19176 19188 19200 19202 19207-19209 19211 19214-19215 19218 19221-19224 19228 19230-19233 19236-19237 19245 19249 19251-19252 19319 19324-19325 19336 19338 19352 19354 19387 19403 19412 19416 19420 19427 19431 19442 19455 19460-19461 19463-19464 19466 19470-19471 19475 19477 19482-19483 19485-19487 19492 19494-19497 19505-19506 19510-19512 19514 19516-19517 19519 19521-19522 19524 19526-19528 19530 19537-19538 19541-19543 19545 19548 19553 19557 19563 19565 19567-19569 19577 19579-19580 19588 19596 19604 19606-19607 19612-19613 19615-19618 19620-19621 19623 19627-19628 19636 19638 19640-19641 19652-19653 19657 19660-19661 19670 19677 19683 19710 19718 19724 19726-19727 19735 19738 19747-19748 19750 19757 19759 19762-19763 19766-19767 19773 19775 19787 19789-19791 19793-19794 19796-19798 19801-19802 19804-19805 19807-19808 19810-19814 19816-19817 19821-19825 19827-19828 19831-19833 19835 19840-19841 19843 19852-19853 19859 19862-19863 19868 19876-19878 19881 19884 19886-19887 19889-19890 19892 19894-19895 19901-19903 19905-19906 19908 19910-19912 19914 19917-19918 19920 19922 19926-19928 19930-19931 19933-19934 19948-19950 19952 19954 19957 19960 19963-19966 19983 19985 19995 20005 20022 20031-20032 20035 20042 20044 20048 20050 20053 20056 20058 20060 20063 20066 20069 20071 20078-20079 20082 20089-20090 20108-20109 20112-20113 20118-20121 20123 20126-20127 20130-20133 20135-20137 20140 20142-20143 20145 20149 20151-20152 20158-20159 20161-20162 20166-20167 20169-20172 20174 20176-20178 20184-20185 20189-20191 20195 20197-20200 20202-20203 20205-20207 20209 20216 20218 20220-20221 20223-20224 20236 20238-20242 20245-20247 20252 20254-20255 20265 20267-20269 20271 20273-20277 20281-20286 20288-20289 20291-20292 20295-20298 20302 20304 20310 20314-20315 20317-20318 20321-20322 20324 20326-20328 20330-20332 20334-20335 20338 20342 20344-20346 20352-20354 20356 20358 20360-20362 20364 20367-20368 20371-20372 20374-20376 20385 20387-20389 20391-20392 20395 20397-20400 20402 20405 20407 20415-20417 20419-20421 20423-20425 20427-20430 20432 20435-20436 20440 20448-20450 20452 20454 20456-20457 20464 21844-21845 21847 21854 21884 21971 22001-22002 22005 22011 23187-23188 23190-23192 23206-23207 23209 25843 25846 25909 25913 25929 25937 25943 25951 25953 25956 25972 25974-25975 25983 25998 26005 26016 26018 26028 26032 26044 26050 26055 26062-26063 26079 26090 26092 26102 26104 26175 26189 26196 26206 26208-26209 26211 26216 26222 26227 26230 26237 26257 26268-26269 26280 26283 26288 26302 26315-26316 26319 26336 26338-26340 26344 26349 26369 26373 26427-26428 26461 26466 26479 26483 26492 26522 26527 26536 26543 26564 26573-26574 26594 26602 26616-26617 26911 26956-26957 26978 26981 26988 27017 27023 27036 27039 27045 27048 27059 27061 27063 27071 27085 27093 27096 27101 27109 27114 27126 27134 27189 27233 27239 27246 27251 27254-27255 27260-27261 27263 27269 27282 27286 27288 27294 27298 27306 27309-27310 27319-27320 27323 27331 27336-27337 27341 27350 27353-27354 27364 27379 27384 27409 27421 27423 27426-27428 27432 27464-27466 27468 27471-27472 27482-27483 27485 27496 27498 27500 27504 27506-27507 27512 27522-27523 27542 27549 27557 27571 27574 27578 27580 27585 27606-27607 27612 27620 27624 27641 27645 27668 27675 27681 27701-27702 27708 27718 27724-27725 27731 27764 27768 27779 27787 27792 27794 27816 27820 27831 27835 27846 27857 27863 27865 27879 27886 27898 27908 27918 27920 27936 27943 27945 27951-27952 27958 27960 27966 27970 27975 27997 28003 28008 28020 28022 28027 28030-28031 28033 28045 28051 28076 28087-28088 28100-28101 28107 28110-28111 28127 28133 28148 28159 28169 28172 28174 28185 28194-28195 28198 28227 28238 28271 28276 28282 28284 28286 28292 28299 28315 28323 28344 28347 28349-28350 28356 28359 28362-28363 28367 28372-28373 28375 28382-28383 28385 28391 28397-28398 28401-28402 28405 28424 28427 28430 28442 28444-28445 28450 28459 28462-28463 28474 28481 28491 28493 28495 28501-28503 28509-28510 28517 28519 28524-28525 28528 28534-28535 28537-28538 28540 28542-28543 28546 28550 28552 28559 28569 28571 28573 28575 28578 28583 28585-28587 28591 28602 28606 28613-28615 28618-28619 28621-28622 28635 28640 28643-28646 28649 28651-28652 28654-28655 28658-28659 28661-28663 30031 30035 30040-30041 30064 30066 31316 31344 31394 31397 31399 31419 31446 31454-31456 31471 31473 31485 31534 31547 31625 31670 31677 31694 31697 31716 31721 31738-31739 32430 32439 32683 36765 36775 36781 36786 36799 36803 36808 36810 36838-36839 36842-36843 36850 36856 36858 36862-36863 45054 49149-49150 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/265/46?format=ascii Optical default J/ApJS/265/46/table1 The properties of the quasar pairs and the line of sight (LOS) MgII absorption lines Pair [1/10033] Pair identifier meta.id int primary NED NED column added by the CDS meta.ref.url char 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 fSDSS Foreground SDSS identifier meta.id.assoc char Plate [273/11704] SDSS Plate identifier meta.id;instr.plate int MJD [51609/58543] SDSS Modified Julian Date of observation d time.epoch int indexed Fiber [1/1000] SDSS Fiber identifier meta.note int zEm [0.4/2.51] Redshift from emission lines src.redshift;pos.heliocentric float logLBol [44.22/47.56] log bolometric luminosity log(1e-07W) phys.luminosity float Dist [20/500] Distance kpc pos.distance float zAbs [0.4/2.3]? Redshift from absorption lines (G1) src.redshift;pos.heliocentric float nullable EW2798 [0.14/9]? MgII2798{AA} equivalent width; Angstroms (G1) 0.1nm spect.line.eqWidth float nullable e_EW2798 [0.02/1.4] 1{sigma} uncertainty in EW2798 (G1) 0.1nm stat.error float EW2803 [0.08/6.9]? MgII2803{AA} equivalent width; Angstroms (G1) 0.1nm spect.line.eqWidth float nullable e_EW2803 [0.02/1.4] 1{sigma} uncertainty in EW2803 (G1) 0.1nm stat.error float bSDSS Background SDSS identifier meta.id;meta.main char Sp Interactive DR16 spectrum from SDSS meta.ref.url char _RA Positions from foreground SDSS identifiers (right ascension part) deg pos.eq.ra;meta.main indexed _DE Positions from foreground SDSS identifiers (declination part) deg pos.eq.dec;meta.main indexed
J/ApJS/265/46/table2 The background quasars with transverse (TRA) MgII absorption lines Sp Interactive DR16 spectrum from SDSS meta.ref.url char Pair [1/10035] Pair identifier meta.id int primary recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int bSDSS Background SDSS identifier meta.id;meta.main char Plate [274/11704] SDSS Plate identifier meta.id;instr.plate int Fiber [1/1000] SDSS Fiber identifier meta.note int zEm [0.5/5.1] Redshift from emission lines src.redshift;pos.heliocentric float Dist [20/500] Distance kpc pos.distance float zAbs [0.4/2.5]? Redshift from absorption lines (G1) src.redshift;pos.heliocentric float nullable EW2798 [0.17/5.13]? MgII2798{AA} equivalent width; Angstroms (G1) 0.1nm spect.line.eqWidth float nullable e_EW2798 [0.01/1.2] 1{sigma} uncertainty in EW2798 (G1) 0.1nm stat.error float EW2803 [0.06/4.7]? MgII2803{AA} equivalent width; Angstroms (G1) 0.1nm spect.line.eqWidth float nullable e_EW2803 [0.01/1.4] 1{sigma} uncertainty in EW2803 (G1) 0.1nm stat.error float _RA Positions from background SDSS identifiers (right ascension part) deg pos.eq.ra;meta.main indexed _DE Positions from background SDSS identifiers (declination part) deg pos.eq.dec;meta.main indexed MJD [51662/58543] SDSS Modified Julian Date of observation d time.epoch int indexed