J/MNRAS/493/390ivo://CDS.VizieR/J/MNRAS/493/390doi:10.26093/cds/vizier.74930390CDSSavchenko S.Marchuk A.Mosenkov A.Grishunin K.2024-08-20T20:16:39Z2023-06-21T15:03:43ZCDS support team

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

cds-question@unistra.frgalaxiesphotometrycatalogsvisible-astronomyDifferent spiral generation mechanisms are expected to produce different morphological and kinematic features. In this first paper in a series, we carefully study the parameters of spiral structure in 155 face-on spiral galaxies, selected from the Sloan Digital Sky Survey, in the three gri bands. We use a method for deriving a set of parameters of spiral structure, such as the width of the spiral arms, their fraction to the total galaxy luminosity, and their colour, which have not been properly studied before. Our method is based on an analysis of a set of photometric cuts perpendicular to the direction of a spiral arm. Based on the results of our study, we compare the main three classes of spirals: grand design, multi-armed, and flocculent. We conclude that: (i) for the vast majority of galaxies (86 per cent), we observe an increase of their arm width with Galactocentric distance; (ii) more luminous spirals in grand design galaxies exhibit smaller variations of the pitch angle with radius than those in less luminous grand design spirals; (iii) grand design galaxies show less difference between the pitch angles of individual arms than multi-armed galaxies. Apart from these distinctive features, all three spiral classes do not differ significantly by their pitch angle, arm width, width asymmetry, and environment. Wavelength dependence is found only for the arm fraction. Therefore, observationally we find no strong difference (except for the view and number of arms) between grand design, multi-armed, and flocculent spirals in the sample galaxies.2020MNRAS.493..390Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/493/390CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/493/390https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/493/390http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/493/390https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/493/390https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/493/390http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/493/390GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/493/390/table1 (General characteristics of the galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/493/390/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/493/390/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/493/390/table1?GETtext/xml+votable180.050000true1.102062531.47202780.0055555555555555566/545 697 2251 2564 4416 4511 4713 4716 4839 4872 4907 5061 5064 5096 5142 5153 5200 5202 5332 5421 5492 5513 5596 5610 5631 5634 5654 5705 5715 5919 5995 5999 6013 6031 6058 6129 6138 6263 6448 6458 6740 6976 7199 7234 7282 7382 7466 7486 7506 8288 8520 8562 8807 8917 8935 8957 8960 9053 9101 9345 9382 9467 9471 9633 10410 10469 10520 10523 10592 10637 10659 10735 10754 10781 10912 10958 10973 11069 11153 11223 11371-11372 11394 11800 11814 17238 17571 17688 17747 17835 17840 17855 17905 17975 18068 18214 18296 18379 18398 18407 18790 19611 19749 20371 20417 25229 25590 25599 26046 26090 26110 26303 26343 26396 26403 26423 26439 26459 26461 26472 26495 26584 26618 26622 27005 27110 27227 27333 27460 27465 27486 27603 27633 27721 27821 27875 27914 27925 27942 27989 28035 28045 28279 28330 28447 28499 28643 28671 30172 31880 32426 32462 36785 36793https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/493/390?format=asciiOpticaldefaultJ/MNRAS/493/390/table1General characteristics of the galaxiesEnvEnvironment (3)meta.code.classcharSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy name (PCGNNNNNNN)meta.id;meta.maincharDistDistance calculated from the best distance modulus from HyperLedaMpcpos.distancefloatScaleScale calculated from the best distance modulus from HyperLedakpc/arcsecinstr.scalefloatr25Semimajor axis of the isophote 25mag/arcsec^2^ in the r bandarcminphys.angSize.smajAxisfloatq25Median flattening between the 24-25mag/arcsec^2^ isophotes in the r bandphys.size.axisRatiofloatrmagApparent asymptotic magnitude in the r-band (1)magphot.mag;em.opt.RfloatrMAGAbsolute magnitude in the r-band (1)magphys.magAbsfloatg-rg-r colour index (2)magphot.color;em.opt.B;em.opt.Rfloatr-ir-i colour index (2)magphot.color;em.opt.R;em.opt.IfloatTypeNumerical morphological type from HyperLedasrc.morph.typefloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainBar[+ ] Bar presence according to the visual inspectionsrc.morph.paramcharJ/MNRAS/493/390/table2Results of the fitting for the r bandNarmsNumber of armsmeta.numberintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint<Psi>Mean pitch angle averaged for all spiral arms we traced (1)degsrc.morph.paramfloatPsirel? Relative pitch angle variation along the radiussrc.morph.paramfloatnullablew? Mean width of spiral arms (in units of r_25_) averaged for all spiral arms we tracedsrc.morph.scLengthfloatnullablea? Slope of the best linear fit to the radial width variation (2)stat.fit.paramfloatnullableAsym? Mean asymmetry of the cuts (3)src.morph.paramfloatnullablefarms? Fraction of the spiral pattern in the total galaxy flux in the r bandphot.flux;arith.ratiofloatnullableg-rg-r colour of the spiral patternmagphot.color;em.opt.B;em.opt.RfloatTypearms[GMF] Arm class (4)meta.code.classcharl_Narms[>= ] Limit flag on Narmsmeta.code.errorcharNameGalaxy name (PCGNNNNNNN)meta.id;meta.mainchar