J/A+A/644/A101ivo://CDS.VizieR/J/A+A/644/A101doi:10.26093/cds/vizier.36440101CDSRodriguez M.J.Baume G.Feinstein C.2022-11-21T14:28:37Z2020-12-08T07:35:38ZCDS support team

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

cds-question@unistra.frgalaxiesstellar-associationsThe purpose of this work is to study the properties of the spatial distribution of the young population in three nearby galaxies in order to better understand the first stages of star formation. We used ACS/HST photometry and the "path-linkage criterion" in order to obtain a catalog of young stellar groups (YSGs) in the galaxy NGC 2403. We studied the internal distribution of stars in these YSGs using the Q parameter. We extended these analyses to the YSGs detected in in NGC 300 and NGC 253 our previous works. We built the young stars' density maps for these three galaxies. Through these maps, we were able to identify and study young stellar structures on larger scales. We found 573 YSGs in the galaxy NGC 2403, for which we derived their individual sizes, densities, luminosity function, and other fundamental characteristics. We find that the vast majority of the YSGs in NGC 2403, NGC 300 and NGC 253 present inner clumpings, following the same hierarchical behavior that we observed in the young stellar structures on larger scales in these galaxies. We derived values of the fractal dimension for these structures between ~1.5 and 1.6. These values are very similar to those obtained in other star forming galaxies and in the interstellar medium, suggesting that the star formation process is regulated by supersonic turbulence.2020A&A...644A.101Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/644/A101CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/139/1066 : X-ray view of NGC 2403 central region (Yukita+, 2010)J/A+A/569/A68 : Green Bank Telescope observations of NGC 2403 (de Blok+, 2014)J/AJ/157/22 : Luminous and variable stars in NGC 2403 & M81 (Humphreys+ 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/644/A101https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/644/A101http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/644/A101https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/644/A101https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/644/A101http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/644/A101GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/644/A101/table1 (Catalog of young stellar groups in NGC 2403)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/644/A101/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/644/A101/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/644/A101/table1?GETtext/xml+votable180.050000true114.27829565.610043890.0055555555555555566/77432.76124552865182e-19 3.9057996558789745e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/644/A101?format=asciidefaultJ/A+A/644/A101/table1Catalog of young stellar groups in NGC 2403recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameIdentification, ASNNNmeta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainRadRadius in arcsecarcsecphys.angSize;srcfloatNNumbers of stars in the YSGmeta.numberintNbNumber of stars members with F606W<24meta.numberintSimbadSimbad column added by the CDSmeta.ref.urlcharQQ value (1)stat.fit.paramdoubleF606WminF606W value of the brightest blue starmagphot.mag;em.opt.RfloatGammaLF? Luminosity function slopearith.grad;phys.luminosity.funfloatnullablee_GammaLF? Error in the LF slopestat.errorfloatnullabledGCGalactocentric distancekpcpos.distance;pos.galactocentricfloatdensityStellar density in stars/pc^3^pc**-3phys.densitydoublee_QError in Qstat.errordouble