J/AJ/155/234ivo://CDS.VizieR/J/AJ/155/234doi:10.26093/cds/vizier.51550234CDSde Souza A.A.Martins L.P.Rodriguez-Ardila A.Fraga L.2019-11-11T22:00:00Z2019-01-11T11:52:14ZCDS support team

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

cds-question@unistra.frgalaxiesvisible-astronomystar-forming-regionsh-alpha-photometryh-ii-regionsNGC 1232 is a face-on spiral galaxy and a great laboratory for the study of star formation due to its proximity. We obtained high spatial resolution H{alpha} images of this galaxy, with adaptive optics, using the SAM instrument at the SOAR telescope, and used these images to study its H II regions. These observations allowed us to produce the most complete H II region catalog for it to date, with a total of 976 sources. This doubles the number of H II regions previously found for this object. We used these data to construct the H II luminosity function, and obtained a power-law index lower than the typical values found for Sc galaxies. This shallower slope is related to the presence of a significant number of high-luminosity H II regions (log L>39 dex). We also constructed the size distribution function, verifying that, as for most galaxies, NGC 1232 follows an exponential law. We also used the H{alpha} luminosity to calculate the star formation rate. An extremely interesting fact about this galaxy is that X-ray diffuse observations suggest that NGC 1232 recently suffered a collision with a dwarf galaxy. We found an absence of star formation around the region where the X-ray emission is more intense, which we interpret as a star formation quenching due to the collision. Along with that, we found an excess of star-forming regions in the northeast part of the galaxy, where the X-ray emission is less intense.2018AJ....155..234Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/155/234CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/441/981 : HII regions in 5 spiral galaxies (Bresolin+, 2005)J/A+A/542/A39 : NIR photometry in 10 nearby spiral galaxies (Grosboel+, 2012)J/AJ/145/165 : BVRI photometry in NGC 6496 (Fraga+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/155/234https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/155/234http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/155/234https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/155/234https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/155/234http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/155/234GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/155/234/table1 (Data from sources detected in galaxy NGC 1232, in order of luminosity)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/155/234/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/155/234/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/155/234/table1?GETtext/xml+votable180.050000true47.4404167-20.55454170.0055555555555555566/36258https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/155/234?format=asciiOpticaldefaultJ/AJ/155/234/table1Data from sources detected in galaxy NGC 1232, in order of luminosityrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/976] Sequential running number of sourcemeta.numberintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainFHa[1.97/16220.5] H{alpha} line flux (in 10^-17^ erg/s/cm^2^)1e-20W.m**-2phot.flux;em.line.Halphadoublee_FHa[0.25/7.99] Uncertainty in FHa (in 10^-17^ erg/s/cm^2^)1e-20W.m**-2stat.errorfloatSFR[5e-06/0.040332] Star formation ratesolMass/yrphys.SFRdoublee_SFR[1e-06/0.00484] Uncertainty in SFRsolMass/yrstat.error;phys.SFRdoubleArea[7/9670] SEXTRACTOR areapixel**2phys.areadoubleLHa[9.26e+35/7.61e+39] H{alpha} luminosity (in erg/s)1e-07Wphys.luminosity;em.line.Halphadouble