J/AJ/168/264ivo://CDS.VizieR/J/AJ/168/264doi:10.26093/cds/vizier/be-58-88CDSWei J.Xu YeLin Z.Hao C.Li Y.Liu D.Bian S.2026-07-02T11:45:05Z2025-09-02T15:22:09ZCDS support team

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

cds-question@unistra.frgalaxiesvisible-astronomyredshiftedMorphology is the starting point for understanding galaxies. Elmegreen et al. classified spiral galaxies into flocculent, multiple-arm, and grand-design galaxies based on the regularity of their spiral arm structure. With the release of a vast number of clear spiral galaxy images from the Sloan Digital Sky Survey, we conducted a morphological classification of 5093 blue spiral galaxies. A statistical analysis of this sample shows that the fractions of flocculent, multiple-arm, and grand-design galaxies are 38%{\pm}1%, 59%{\pm}1%, and 3%{\pm}1%, respectively. Redshift has no obvious influence on this classification. However, as the bulge size becomes larger, the fraction of multiple-arm galaxies increases, while that of flocculent galaxies decreases. In addition, we performed a statistical analysis of 3958 galaxies with a clear spiral arm structure, finding that 82% of these galaxies have two arms in their inner regions. We also found that the majority (74%) of the barred spiral galaxies exhibit the characteristics of two inner spiral arms and multiple outer spiral arms, and there is no barred spiral galaxy in this work with four continuous spiral arms from the inner to the outer regions. These results highlight that the spiral arm structure of the Milky Way, according to the current mainstream view of a four-arm galaxy with continuous arms extending from the inner to outer regions, is quite unique. However, our findings align with the spiral morphology of the Milky Way proposed by Xu et al., in which case our Galaxy can be considered typical.2024AJ....168..264Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/168/264CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/282 : The SDSS Photometric Catalog, Release 6 (Adelman-McCarthy+, 2007)V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)VIII/39 : Composite CO Survey of the Milky Way (Dame+ 1987)J/MNRAS/278/1025 : The APM Bright Galaxy Catalogue (Loveday 1996)J/A+A/397/133 : Star-forming complexes in the Galaxy (Russeil+, 2003)J/MNRAS/405/783 : Passive red spirals in Galaxy Zoo (Masters+, 2010)J/MNRAS/410/166 : Morphological types from Galaxy Zoo 1 (Lintott+, 2011)J/MNRAS/435/2835 : Morphological types from Galaxy Zoo 2 (Willett+, 2013)J/A+A/569/A125 : Spiral structure of the Milky Way (Hou+, 2014)J/ApJS/217/32 : S4G galaxy morphologies in the CVRHS system (Buta+, 2015)J/ApJ/885/131 : ~200 high-mass SFR plx & proper motion with VLBI (Reid+, 2019)J/ApJ/947/54 : High-mass SFR masers w/ VLBI & external MW-like gal. (Xu+, 2023)http://www.sdss.org/dr18/ : SDSS DR18https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/168/264https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/168/264http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/168/264https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/168/264https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/168/264http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/168/264GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/168/264/table1 (Morphology and structure of the spiral galaxies in this study)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/168/264/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/168/264/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/168/264/table1?GETtext/xml+votable180.050000true149.016541710.49883330.0055555555555555565/1037 1040 1137 1148 1184 1191 1205 1211 1280 1343 1350 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26982 26984 26986-26988 26990 26995-26996 27000 27004 27006 27023 27027 27029 27031 27035 27045-27046 27048 27057 27059 27061 27065-27066 27068 27073-27075 27077 27089-27090 27092 27094 27096 27098 27107 27109-27110 27112 27114-27116 27118-27119 27121 27128 27130-27131 27199 27215 27217 27220-27222 27224-27226 27229-27231 27235 27238-27239 27241 27244 27251 27256 27258-27259 27261 27283 27285 27289 27291-27292 27299-27300 27305-27306 27309-27312 27325 27329-27330 27334 27337 27342 27345 27349 27352-27353 27355 27358 27363-27364 27374 27377 27379 27381 27383-27384 27386 27388 27391 27394 27396 27399-27401 27403 27409 27411 27413-27415 27417 27419-27420 27422-27423 27428 27430-27431 27433 27442 27444-27446 27448 27450 27453-27454 27456 27459-27462 27466 27469 27472 27475 27477 27479 27481 27483-27485 27488-27489 27491 27497 27501 27507-27510 27513 27517 27519 27522 27524 27529-27530 27533 27535 27537-27539 27541 27547 27549 27554 27557-27559 27561 27564 27566 27568 27571 27576-27577 27581-27582 27586 27590-27592 27595 27604 27609 27615 27617-27618 27620 27625 27648 27651-27653 27657-27660 27662 27666 27668-27669 27671 27676 27680-27681 27683-27684 27686-27687 27689 27693 27696 27711 27714 27727 27731-27732 27739 27747 27753-27754 27756-27757 27759 27765-27766 27771-27772 27774 27776 27795 27800 27803-27805 27810-27811 27813 27817 27820 27825-27827 27830 27833 27835 27840-27841 27845-27846 27850-27852 27854-27856 27858 27860-27862 27864-27866 27868 27870 27876 27878-27879 27881-27883 27886 27889-27890 27896-27897 27899 27912 27914-27917 27920 27924 27927-27928 27932-27933 27936-27937 27939-27940 27942-27943 27945-27946 27948 27951 27970 28032 28036 28126 28158 28160-28162 28166 28168 28174-28175 28177 28179 28181 28183 28185-28186 28188-28190 28192-28193 28195 28199-28200 28205-28206 28217 28219-28220 28224 28226 28233 28254 28276 28279 28285 28289-28290 28292-28294 28297-28298 28304 28329-28331 28343 28366 28375 28381-28384 28386-28387 28390 28397 28400 28412 28414 28426 28447 28450 28453 28455 28459-28460 28463 28469 28471 28477 28479 28486-28487 28489-28491 28495 28497-28499 28502 28504-28505 28507 28510 28513-28514 28517-28518 28520 28522 28524 28527 28529 28531-28532 28534-28535 28538-28539 28541-28542 28546-28547 28549 28551 28554 28557 28561 28567-28569 28571 28574-28578 28580-28581 28584 28586-28587 28591 28597-28600 28603 28605 28610 28616 28618 28620 28626-28627 28633-28634 28638 28644 28646-28647 28649 28654 28659 28661-28663 28667 28671 30033 30037 30065 31295 31336 31338 31354 31359 31375 31377-31379 31383-31384 31387 31390 31392 31395-31396 31399 31404 31414-31415 31419 31421-31424 31429-31430 31433 31435 31437 31440-31441 31445 31447 31453-31455 31457 31464 31474 31476 31478 31484-31486 31534 31544 31616-31618 31623-31624 31629-31630 31648 31656-31657 31659 31693 31695 31697 31715-31717 31719 31723-31724 31726-31729 31737 31740 32397 32406 32408-32410 32423 32429-32430 32433 32436-32437 32439-32442 32445 32456-32457 32480-32482 32484 32489 32491-32492 32502-32503 32509-32511 32682 36703 36719 36722 36725 36728 36732-36733 36759 36766 36780 36785 36790 36803 36808 36861 45046 45050 45052 45055 48988-48989 49012-49014 49017-49018 49020 49079 49091-49092 49095 49097 49100 49102 49105 49129 49150-49151https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/168/264?format=asciiOpticaldefaultJ/AJ/168/264/table1Morphology and structure of the spiral galaxies in this studyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS identifier (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharMorph1First classification of the spiral galaxy morphology (1)meta.code;src.morphcharMorph2Second classification of the spiral galaxy morphology (1)meta.code;src.morphcharz[0.03/0.09] Redshift of the galaxysrc.redshiftfloatfDeV[0.0/0.5] SDSS structural parameter (5)src.morph.paramfloatBarWhether the galactic center has a bar; Yes or Nometa.code;src.morphcharInnerArm[1/4]? Number of inner arms (2)meta.numberintnullable(Rb/R)1[0.0/0.8]? First statistic of relative position of branching points (3)stat.param;arith.ratio;src.morphfloatnullable(Rb/R)2[0.0/0.86]? Second statistic of relative position of branching points (3)stat.param;arith.ratio;src.morphfloatnullableTheta1[0/301]? Angle of one of the inner arm's branching point (4)degsrc.morph.paramintnullableTheta2[80/359]? Angle of the other inner arm's branching point (4)degsrc.morph.paramintnullableSloanDisplay the online SDSS DR18 data for the nearest objectmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlchar_RAPosition from SDSS identifier (JHHMMSS.ss+DDMMSS.s) (right ascension part)degpos.eq.ra;meta.main_DEPosition from SDSS identifier (JHHMMSS.ss+DDMMSS.s) (declination part)degpos.eq.dec;meta.main