J/MNRAS/397/1756ivo://CDS.VizieR/J/MNRAS/397/1756doi:10.26093/cds/vizier.73971756CDSDurbala A.Buta R.Sulentic J.W.Verdes-Montenegro L.2024-07-09T20:15:29Z2013-11-27T12:12:13ZCDS support team

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

cds-question@unistra.frgalaxiesphotometrygalaxy-classification-systemstwo-color-diagramsWe present here the results of a Fourier photometric decomposition of a representative sample of ~100 isolated CIG galaxies (Catalog of Isolated Galaxies) in the morphological range Sb-Sc. This study is an integral part of the AMIGA (Analysis of the Interstellar Medium of Isolated Galaxies) project. It complements the photometric analysis presented in our previous paper for the same sample of disc galaxies by allowing a description of the spiral structure morphology. We also estimate dynamical measures like torque strength for bar and spiral, and also the total non-axisymmetric torque by assuming a constant mass-to-light ratio, and explore the interplay between the spiral and bar components of galaxies. Both the length (l_bar_) and the contrast (e.g. A_2b_) of the Fourier bars decrease along the morphological sequence Sb-Sbc-Sc, with bars in earlier types being longer and showing higher contrast. The bars of Sb galaxies are ~ three times longer than the bars in Sc types, consistent with our previous study. We find that the longer bars are not necessarily stronger (as quantified by the torque Q_b_measure), but longer bars show a higher contrast A_2b_, in very good agreement with theoretical predictions. Our data suggest that bar and spiral components are rather independent in the sense that the torque strengths of the two components are not correlated. The total strength Q_g_ is a very reliable tracer of the bar strength measure Q_b_, the two quantities showing a very tight linear correlation. Comparison with a similar sample of disc galaxies (same morphological range) extracted from the OSUBGS (Ohio State University Bright Galaxy Survey) indicates that the isolated CIG/AMIGA galaxies host significantly longer Fourier bars and possibly show a different distribution of spiral torque Q_s_. The Fourier analysis also revealed a potential case of counterwinding spiral structure (KIG652/NGC5768), which deserves further kinematic study. We find that m=2 (i.e. dominating two-armed pattern) is the most common spiral arm multiplicity among the sample of Sb-Sc CIG/AMIGA galaxies (~40 per cent), m=2 and 3 and m=1 and 2 are found in ~28 and ~13 per cent of isolated galaxies, respectively.2009MNRAS.397.1756Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/397/1756CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/82 : Catalogue of Isolated Galaxies (Karachentseva+ 1986)J/A+A/411/391 : AMIGA project. CIG galaxies revised positions (Leon+, 2003)J/A+A/436/443 : AMIGA I Velocities of CIG galaxies (Verdes-Montenegro+, 2005)J/A+A/449/937 : AMIGA II Morphological refinement (Sulentic+, 2006)J/A+A/462/507 : AMIGA III IRAS data (Lisenfeld+, 2007)J/A+A/470/505 : AMIGA IV Neighbours around CIG galaxies (Verley+, 2007)J/A+A/472/121 : AMIGA V Isolation parameters (Verley+, 2007)J/A+A/485/475 : AMIGA VI Radio fluxes of the isolated galaxies (Leon+ 2008)J/A+A/486/73 : AMIGA VII FIR and radio study (Sabater+, 2008)J/A+A/532/A117 : AMIGA VIII Flux ratio asymmetry parameter (Espada+, 2011)J/A+A/534/A102 : AMIGA IX Molecular gas properties (Lisenfeld+, 2011)J/A+A/540/A47 : AMIGA X Isolated galaxy colors (Fernandez Lorenzo+, 2012)J/A+A/545/A15 : AMIGA XI Optical nuclear activity (Sabater+, 2012)J/MNRAS/434/325 : 452 AMIGA gal. physical parameters (Fernandez Lorenzo+ 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/397/1756https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/397/1756http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/397/1756https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/397/1756https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/397/1756http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/397/1756GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/397/1756/table1 (Fourier-derived parameters in i band for the CIG/KIG galaxies in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/397/1756/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/397/1756/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/397/1756/table1?GETtext/xml+votable180.050000true3.6328-0.7376750.0055555555555555566/4276 4385 4514 4714 4789 4820 4824 4909 4941 4955 5003 5080 5096 5165 5309 5683 5818 5820 5882 5884 6120 6411 6460 6536 6637 6740 6929 7177 7262 7282 7382 7404 8323 8473 8506 8611 8888 9099 9228 9382 9687 9750 9868 10190 10280 10326 10711 10759 10799 10802 10895 11118 11192 11245 11311 11417 11502 11600 12400 12547 12551 17835 18069 18081 19045 19051 19138 25960 26604 26957 26960 26975 26981 27017 27215 27227 27229 27385 27503 27547 27582 27650 27656 27903 28112 28204 28363 28557 30038 31644 32431 32478 45050https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/397/1756?format=asciiOpticaldefaultJ/MNRAS/397/1756/table1Fourier-derived parameters in i band for the CIG/KIG galaxies in our sampleCIG[1/1051] Catalog of Isolated Galaxy number (VII/82) number, <K73 NNNN> in Simbadmeta.id;meta.mainintprimaryPA[0/180] Mean orientation angle (1)degpos.posAngintmet[abc] Bulge deprojection method used (2)meta.notecharQgTotal strength of galaxy Qg (3)src.morph.paramfloate_QgTotal strength standard deviation (SD)stat.errorfloatQb? Bar strength (3)src.morph.paramfloatnullablee_Qb? Bar strength standard deviation (SD)stat.errorfloatnullableQsSpiral strength (3)src.morph.paramfloate_QsSpiral strength standard deviation (SD)stat.errorfloatA2b? Maximum Fourier relative amplitude A2b (4)stat.fit.paramfloatnullableA4b? Maximum Fourier relative amplitude A4b (4)stat.fit.paramfloatnullableA6b? Maximum Fourier relative amplitude A6b (4)stat.fit.paramfloatnullablelbar? Fourier bar lengtharcsecphys.angSize;srcfloatnullabler(Qb)? Radius of maximal bar torquearcsecphys.angSize;srcfloatnullableCIG86Details from the original CIG (Karachentseva et al. 1986, Cat. VII/82)meta.ref.urlcharAMIGADisplay the data from all AMIGA papersmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharNEDSimbad column added by the CDSmeta.refcharLEDASimbad column added by the CDSmeta.refchar_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.main