SDSS DR12 QSOs [OIII] doublet J/MNRAS/452/4153 ivo://CDS.VizieR/J/MNRAS/452/4153 doi:10.26093/cds/vizier.74524153 CDS Albareti F.D. Comparat J. Gutierrez C.M. Prada F. Paris I.,Schlegel D. Lopez-Corredoira M. Schneider D.P. Manchado A.,Garcia-Hernandez D.A. Petitjean P. Ge J. 2024-08-15T20:14:37Z 2016-05-17T12:10:16Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr surveys quasars redshifted spectroscopy From the Sloan Digital Sky Survey (SDSS) Data Release 12, which covers the full Baryonic Oscillation Spectroscopic Survey (BOSS) footprint, we investigate the possible variation of the fine-structure constant over cosmological time-scales. We analyse the largest quasar sample considered so far in the literature, which contains 13175 spectra (10363 from SDSS-III/BOSS DR12+2812 from SDSS-II DR7) with redshift z<1. We apply the emission-line method on the [OIII] doublet ({lambda}{lambda}4960, 5008{AA}) and obtain {Delta}{alpha}/{alpha}=(0.9+/-1.8)x10^-5^ for the relative variation of the fine-structure constant. We also investigate the possible sources of systematics: misidentification of the lines, sky OH lines, H{beta} and broad line contamination, Gaussian and Voigt fitting profiles, optimal wavelength range for the Gaussian fits, chosen polynomial order for the continuum spectrum, signal-to-noise ratio and good quality of the fits. The uncertainty of the measurement is dominated by the sky subtraction. The results presented in this work, being systematics limited, have sufficient statistics to constrain robustly the variation of the fine-structure constant in redshift bins ({Delta}z~0.06) over the last 7.9Gyr. In addition, we study the [NeIII] doublet ({lambda}{lambda}3869, 3968{AA}) present in 462 quasar spectra and discuss the systematic effects on using these emission lines to constrain the fine-structure constant variation. Better constraints on {Delta}{alpha}/{alpha}(<10^-6^) using the emission-line method would be possible with high-resolution spectroscopy and large galaxy/qso surveys. 2015MNRAS.452.4153A https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/452/4153 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to J/ApJ/773/14 : BOSS: quasar luminosity function (Ross+, 2013) J/ApJ/778/98 : Cross-correlation of SDSS QSOs & BOSS galaxies (Shen+, 2013) J/ApJS/199/3 : The quasars MMT-BOSS pilot survey (Ross+, 2012) J/ApJS/210/7 : BOSS narrow CIV absorption lines. I. zem<=2.4 (Chen+, 2014) J/ApJS/215/12 : BOSS narrow CIV absorption lines. II. zem>2.4 (Chen+, 2014) J/MNRAS/418/1055 : BOSS morphology of galaxies (Masters+, 2011) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/452/4153 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/452/4153 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/452/4153 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/452/4153 https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/452/4153 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/452/4153 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/MNRAS/452/4153/catalog (Combined sample) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/452/4153/catalog? https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/452/4153/catalog? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/452/4153/catalog? 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18308-18310 18319 18321-18323 18326 18331 18333-18334 18341-18342 18346-18347 18349 18354-18356 18359 18361-18365 18367-18369 18371-18372 18375 18377-18379 18382-18383 18385 18388-18390 18392 18394-18395 18397-18398 18401 18403-18406 18408 18410-18411 18415 18420-18421 18425 18428 18430 18519 18521 18533 18537 18539 18546 18585 18587-18590 18599 18653 18670 18676 18678 18682-18683 18685-18687 18690 18733 18739 18743-18744 18746-18747 18749-18751 18755 18757-18760 18763-18764 18766 18768 18770 18772-18773 18775 18777 18781-18782 18784 18786-18788 18790-18791 18794-18798 18801-18802 18805 18814 18821-18822 18824 18826-18827 18830-18833 18835 18842-18844 18846 18850-18851 18853 18855-18856 18858-18859 18861-18862 18865-18866 18873 18878 18881 18887 18889 18891 18894 18896-18897 18899 18903 18905-18906 18912-18913 18915-18918 18922-18925 18930-18932 18934 18936 18940-18941 18975 18994 18996 19000 19004 19007 19012-19013 19015 19017-19018 19020-19021 19023-19025 19027 19030-19033 19035-19038 19043 19045-19050 19052-19053 19061-19065 19075 19077 19079 19081 19085 19087-19088 19090 19092-19093 19095-19097 19099-19102 19104-19105 19107 19109 19111 19114 19116 19118 19120-19122 19125 19127 19131-19134 19137-19140 19144 19147 19150-19153 19156 19158-19162 19164-19165 19167 19170 19172 19181-19184 19188-19190 19194 19196 19198-19199 19202-19204 19206 19212-19213 19224 19227 19233 19238 19241 19243-19245 19247-19249 19251-19252 19254 19257 19260 19263-19265 19267 19269-19272 19274-19275 19280 19286 19291 19293-19294 19297 19300 19302 19305 19308-19309 19311 19317-19318 19323 19327 19331-19332 19334-19335 19338-19340 19342-19343 19347-19348 19355 19357-19358 19362 19365 19371-19372 19376 19378 19381-19383 19386 19388 19390-19391 19398-19399 19403-19404 19406-19407 19410 19416 19418 19424-19425 19430-19431 19435-19436 19442 19445-19448 19451 19453-19455 19462 19466 19468-19469 19471 19474-19477 19479 19486-19487 19497 19499-19500 19503 19505-19510 19513-19516 19518 19520-19522 19525-19526 19528-19530 19532-19534 19537-19538 19542 19546-19548 19550 19552 19555 19558 19560-19561 19566-19567 19569 19584 19586-19588 19593 19595 19597 19599-19601 19604-19606 19611-19612 19616-19617 19621 19623 19625 19627-19629 19631-19632 19635 19639-19641 19653 19663-19666 19669-19671 19674-19676 19680-19681 19685 19688 19691-19692 19694 19700 19702 19704-19706 19708 19710 19713 19715 19717-19718 19726-19727 19729-19730 19732 19736 19739-19741 19743-19744 19746-19747 19753-19755 19757-19761 19763 19772-19773 19775-19776 19779-19780 19783-19784 19786 19792-19793 19796-19798 19802-19804 19808-19809 19811-19812 19816-19817 19826 19828-19830 19834 19836 19838-19839 19846-19847 19849-19851 19854-19855 19858-19859 19862 19864 19866 19869 19873 19877-19878 19881 19884 19887-19888 19892-19893 19895 19897-19898 19900-19901 19906 19911-19913 19917 19925 19927 19930 19932 19934-19936 19938 19941 19950 19952 19954 19956-19957 19960 19963 19966 19968 19970-19971 19973 19977 19980 19982-19983 19985-19987 19989-19991 19997 19999 20004-20005 20007-20008 20010-20012 20016 20020-20022 20024-20025 20027 20029 20036 20042 20047 20053 20055 20058 20060 20062 20066 20070-20072 20077-20078 20084 20086 20092-20094 20100 20102-20103 20105-20108 20113 20118-20119 20121 20124-20126 20133 20135 20137-20138 20140 20142 20144-20145 20147 20155 20164 20167 20169-20172 20181-20184 20186 20188 20194 20197 20199 20201-20202 20211 20215-20216 20222 20224 20226 20228 20231 20233 20235 20238 20245 20247 20250-20251 20256-20257 20264-20265 20267-20268 20270-20271 20275 20278 20281-20283 20285-20287 20290 20292-20293 20296 20300 20304 20312-20314 20317 20324 20326 20335 20338-20340 20344 20346-20349 20353 20360-20361 20364 20366 20370 20376-20378 20381 20384-20386 20389 20392 20395 20397 20399-20400 20402-20403 20411 20415 20423 20425 20427-20428 20432 20442 20449-20450 20453 20456-20457 21781 21823 21839 21843 21849 21851 21865 21869 21871 21873-21874 21877-21878 21880 21884 21886-21887 21911 21916 21960-21961 21970 21976 21979 21991 21999 22002 22004 22007 22009-22011 22352-22353 22357 22363 22384 22387-22388 22390 22396-22397 22484 22486-22487 22494-22495 22517 22760 23046-23047 23056 23064 23073-23074 23103 23145-23147 23186-23187 23193-23194 23198 23203 23212 23216-23217 23234 23354 24061 25582 25586 25590-25591 25593 25595 25599 25823 25838 25843 25845 25847 25854 25908 25911 25914-25915 25917-25918 25929 25936 25939 25944 25946-25947 25949 25953-25955 25960 25964 25966-25970 25972 25974 25976 25980-25982 25992-25994 25996 26002 26004 26006-26007 26009 26013 26015-26016 26019 26021-26024 26026 26028-26029 26031 26033-26034 26036-26037 26039 26041-26042 26044 26048 26052 26057 26065 26067 26069-26073 26075-26076 26079-26080 26085-26088 26090 26092-26093 26096-26097 26100 26103-26106 26113 26121 26143 26159 26163-26166 26171-26173 26175 26180-26182 26188-26190 26192-26193 26195 26197-26198 26200 26209 26211-26213 26219 26222 26227 26233-26234 26245 26247 26249 26252 26254 26260 26263-26264 26268 26270 26275 26277 26279 26285-26289 26291-26293 26296-26297 26300-26302 26306 26309 26311 26313 26317 26319-26322 26331 26333 26335-26337 26344 26349 26351 26353 26355 26358-26359 26363-26364 26366-26367 26369 26372-26374 26379 26382 26385-26386 26388-26389 26391 26393-26395 26401 26404 26407-26409 26412 26415 26417 26420 26423 26428 26431-26432 26434-26435 26440 26442-26443 26445 26448 26452-26454 26458 26460-26462 26464-26465 26467-26470 26474-26475 26477 26479-26481 26483 26488-26490 26492 26495-26496 26498-26499 26501 26504-26505 26509 26511 26520 26529-26534 26536-26537 26539-26541 26548 26551 26553-26554 26562-26564 26567-26568 26570-26573 26575-26577 26580 26583 26587 26592 26599 26601 26604 26606-26607 26612-26614 26617 26862 26867 26870-26872 26875 26911 26927 26932 26941 26943 26951-26952 26955-26957 26959-26960 26962-26965 26972-26974 26977 26986-26987 26989-26990 26994 26997 27003-27006 27013-27014 27016-27017 27021 27026-27027 27029 27032 27035 27037 27046-27047 27051 27054 27057 27059-27061 27065 27067 27070-27071 27075 27077-27080 27082-27083 27088 27091 27094-27095 27097 27100-27101 27109-27112 27114 27121 27130-27131 27133-27134 27187 27189-27191 27194 27196-27198 27203-27204 27206-27208 27210 27213-27214 27216 27220 27222-27223 27228 27230-27231 27233-27235 27239-27240 27243 27247-27248 27255-27256 27258-27262 27269-27271 27274 27276 27278-27279 27281-27283 27287 27290-27291 27293-27295 27297-27299 27302 27306-27307 27309 27316 27319-27320 27322-27323 27326-27327 27329-27331 27333-27335 27341-27343 27345-27346 27349-27353 27355 27358 27360 27362 27364 27368-27369 27371 27373 27376-27378 27382-27383 27388-27390 27392 27397-27399 27410-27413 27417-27420 27423 27427 27431-27434 27436-27437 27440-27441 27445 27448-27449 27453 27460 27462 27464 27467 27469 27474-27477 27479 27485-27489 27493-27495 27497-27499 27503-27506 27508 27513-27517 27520 27522 27525-27528 27531 27534 27536-27537 27540 27542-27543 27545-27546 27549 27554-27555 27558 27561 27566-27567 27569-27570 27572-27573 27575 27577-27580 27582-27586 27588 27591 27593 27595-27597 27599-27600 27602 27608 27611-27612 27615 27624 27627 27632 27634-27635 27637-27638 27642-27643 27651-27653 27655-27656 27659 27661-27662 27664-27665 27674 27677-27681 27683 27685 27687 27693 27695 27697-27698 27700-27701 27706-27708 27710 27712 27715 27719-27722 27724-27725 27728 27730 27732-27733 27735-27736 27738-27739 27741-27743 27749-27751 27766-27770 27772 27775 27780 27789 27793-27794 27796-27797 27799-27801 27805-27806 27809-27811 27813-27814 27817 27819 27824-27826 27828 27834-27836 27838-27841 27847-27848 27851 27854-27855 27859-27862 27865-27869 27872 27875 27879 27881 27883 27885-27886 27888-27890 27894-27897 27901 27908-27909 27918-27919 27922 27925 27927-27928 27930 27932-27933 27935-27938 27941-27943 27950 27954-27955 27959-27960 27964 27966-27967 27972 27975 27978-27979 27981-27982 27986-27987 27989-27990 27993-27994 27996-27997 27999 28001-28002 28005 28014-28015 28018-28019 28021-28023 28031-28034 28037-28040 28043-28046 28049-28051 28057-28060 28062 28070-28073 28079-28080 28088-28090 28092 28096 28099-28102 28104 28106-28108 28110-28112 28114 28117-28118 28120 28125-28127 28129-28130 28133-28135 28137-28138 28141-28143 28147-28148 28150-28152 28154-28156 28158-28159 28161-28162 28166-28168 28171 28176 28179 28183-28184 28187-28189 28191 28193-28196 28199-28200 28206 28215-28217 28221-28222 28226-28230 28232 28234-28235 28238-28239 28241 28249 28251 28257 28261-28264 28266 28268 28270-28271 28274 28288-28290 28292 28294 28296-28298 28303 28309 28312 28317-28319 28322-28326 28328-28330 28334-28336 28338 28348-28349 28351-28353 28355 28360-28362 28364-28365 28367 28392 28394-28397 28418-28419 28421 28424 28426 28430 28432 28434-28435 28437 28441-28444 28446 28449-28453 28455 28457-28459 28464-28466 28470-28472 28476-28478 28481 28483 28493 28495 28498 28502-28503 28514-28515 28520 28522-28523 28526-28530 28532 28535 28537-28538 28540 28542 28556-28558 28560-28561 28563-28565 28567 28572-28573 28575 28585-28587 28596 28598-28599 28601-28604 28607 28614-28616 28618 28622-28623 28636-28638 28642-28645 28647 28656 28659-28661 28663 28665-28667 28669 30033 30043-30044 30046 31293-31294 31322-31324 31330 31338 31355 31359 31373-31375 31379 31382-31383 31385-31389 31391 31393-31394 31401-31402 31404 31406-31409 31411-31413 31422 31425-31427 31430-31431 31437-31438 31440-31441 31443-31444 31447-31450 31455 31463 31465 31470-31474 31477 31485 31487 31528 31535 31599 31616-31617 31623-31626 31629 31631 31639 31643 31648-31649 31651-31653 31660 31662 31669 31673 31676-31677 31679 31684 31686 31691 31693-31696 31698 31700 31702 31705 31709 31712-31713 31715 31717-31718 31720-31721 31724 31728 31730-31733 31736-31738 31740 31743 31908 32386 32391 32393-32395 32408 32411 32417-32418 32420 32422 32424 32426 32431 32443-32444 32447 32459 32473-32474 32478-32480 32482-32484 32487 32499-32500 32504 32507 32650 32672 32680 32683 32686 32696 32698 36719 36722 36725 36727 36729-36730 36733 36763 36765 36767 36774 36776-36778 36781-36783 36785-36786 36797-36798 36803 36806 36808-36810 36815-36816 36840 36842-36844 36856-36857 36859 36861 36863 40951 40958 45044 45047 45051-45052 45054-45055 48990 49015 49017 49020 49022 49077 49098-49099 49101 49106 49119 49151 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/452/4153?format=ascii default J/MNRAS/452/4153/catalog Combined sample SimbadName Simbad column added by the CDS meta.id char recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int SDSS SDSS-DR12 designation HHMMSS.ss+DDMMSS.s (J2000) meta.id char RAJ2000 Right Ascension in decimal degrees (J2000) deg pos.eq.ra;meta.main DEJ2000 Declination in decimal degrees (J2000) deg pos.eq.dec;meta.main THING THING ID meta.id char Plate Spectroscopic plate number meta.id;instr.plate int MJD Spectroscopic MJD (>55000 SDSS-III/BOSS spectra, <55000 SDSS-II spectra) d time.epoch;pos.parallax.spect int Fiber Spectroscopic fibre number meta.number;pos.parallax.spect int zvi Redshift from visual inspection src.redshift;pos.heliocentric double zpipe ? Redshift from BOSS pipeline src.redshift;pos.heliocentric double nullable e_zpipe ? Error on BOSS pipeline redshift stat.error double nullable alpha {delta}{alpha}/{alpha} from the Gaussian fits phot.color;em.opt.V;em.line.Halpha double e_alpha Standard error for {delta}{alpha}/{alpha} from the Gaussian fits stat.error;pos.eq.ra double SNO1 S/N for the [OIII] 4960{AA} line stat.snr double SNO2 S/N for the [OIII] 5008{AA} line stat.snr double SNHb S/N for the H{beta} 4861{AA} line stat.snr double O1fit Line centroid for the [OIII] 4960{AA} line stat.fit.param float O2fit Line centroid for the [OIII] 5008{AA} line stat.fit.param double e_O1fit Error on O1fit stat.error float e_O2fit Error on O2fit stat.error float O1Amp Gaussian amplitude at the centre for the [OIII] 4960{AA} line (O1_FLUX) spect.line.width double O2Amp Gaussian amplitude at the centre for the [OIII] 5008{AA} line (O2_FLUX) spect.line.width double O1Width Gaussian width for the [OIII] 4960{AA} line spect.line.width double O2Width Gaussian width for the [OIII] 5008{AA} line spect.line.width double FileName File name to download from the SDSS server meta.id;meta.file char Sp Interactive spectrum from SDSS, if found meta.ref.url char