J/MNRAS/451/1307ivo://CDS.VizieR/J/MNRAS/451/1307doi:10.26093/cds/vizier.74511307CDSZaragoza-Cardiel J.Beckman J.E.Font J.Garcia-Lorenzo B.,Camps-Farina A.Fathi K.James P.A.Erroz-Ferrer S.,Barrera-Ballesteros J.Cisternas M.2024-08-14T20:22:11Z2015-06-12T15:45:17ZCDS support team

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

cds-question@unistra.frgalaxiesh-ii-regionsWe have observed 10 interacting galaxy pairs using the Fabry-Perot interferometer GH{alpha}FaS (Galaxy H{alpha} Fabry-Perot system) on the 4.2m William Herschel Telescope (WHT) at the Observatorio del Roque de los Muchachos, La Palma. We present here the H{alpha} surface brightness, velocity and velocity dispersion maps for the 10 systems we have not previously observed using this technique, as well as the physical properties (sizes, H{alpha} luminosities and velocity dispersion) of 1259 HII regions from the full sample. We also derive the physical properties of 1054 HII regions in a sample of 28 isolated galaxies observed with the same instrument in order to compare the two populations of HII regions. We find a population of the brightest HII regions for which the scaling relations, for example the relation between the H{alpha} luminosity and the radius, are clearly distinct from the relations for the regions of lower luminosity. The regions in this bright population are more frequent in the interacting galaxies. We find that the turbulence, and also the star formation rate, are enhanced in the HII regions in the interacting galaxies. We have also extracted the H{alpha} equivalent widths for the HII regions of both samples, and we have found that the distribution of HII region ages coincides for the two samples of galaxies. We suggest that the SFR enhancement is brought about by gas flows induced by the interactions, which give rise to gravitationally bound gas clouds which grow further by accretion from the flowing gas, producing conditions favourable to star formation.2015MNRAS.451.1307Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/451/1307CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/393/389 : H{alpha} in spiral galaxies HII regions (Marquez+, 2002)J/A+A/481/645 : HII regions in interacting galaxies (Ferreiro+, 2008)J/other/RAA/14.1393 : HII regions in interacting system Arp 86 (Zhou+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/451/1307https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/451/1307http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/451/1307https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/451/1307https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/451/1307http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/451/1307GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/451/1307/HIIreg (Physical properties of the brightest HII regions in interacting galaxies (table A1) and isolated galaxies (table A2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/451/1307/HIIreg?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/451/1307/HIIreg?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/451/1307/HIIreg?GETtext/xml+votable180.050000true94.66416778.3550560.005555555555555556Cone search capability for table J/MNRAS/451/1307/list (List of fits files)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/451/1307/list?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/451/1307/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/451/1307/list?GETtext/xml+votable180.050000true174.9289931.920810.0055555555555555566/611 2481 4405 5200 5241 5594 5793 6241 6448 6619 6649 7177 7584 7655 7997 8106 8256 9437 10490 10912 10955 11446-11447 11772 12633 17780 17905 18011 18212 25344 25972 25997 25999 27458 27712 27918 28037 28593 28617 31345 40410 40432https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/451/1307?format=asciidefaultJ/MNRAS/451/1307/HIIregPhysical properties of the brightest HII regions in interacting galaxies (table A1) and isolated galaxies (table A2)NameGalaxy namemeta.id.parentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/303] Consecutive number in catalog, within the galaxymeta.id;meta.mainintn_Namemeta.code;src.morphcharNfNumber of FITS images for this galaxymeta.ref.urlintnullableRAJ2000Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainlogLHa[35/41] Log of H{alpha} luminosity (erg/s)log(1e-07W)phys.luminosity;em.line.Halphafloate_logLHa[0.006/0.4] Log of H{alpha} luminosity errorlog(1e-07W)stat.errorfloatR[16/481] Globular radiuspcphys.size.radiusinte_R[1/50] Radius errorpcstat.errorintlogMHII[3.2/7.6] Ionized gas masslog(solMass)phys.massfloate_logMHII[0.03/0.9] Ionized gas mass errorlog(solMass)stat.errorfloatrhoHII[0.007/0.37] Ionized gas density {rho}_HII_solMass.pc**-3phys.densityfloate_rhoHII[0.0004/0.09] Ionized gas density errorsolMass.pc**-3stat.errorfloatsigma[4/43] Velocity dispersion {sigma}km/sphys.veloc.dispersionfloate_sigma[0.3/10]? Velocity dispersion errorkm/sstat.errorfloatnullablealpVir[1/10000]? Virial parameter ({alpha}_vir_) (1)phys.mass;arith.ratiofloatnullablee_alpVir[0.5/7000]? Virial parameter errorstat.errorfloatnullableEWHa[0.03/2033]? H{alpha} equivalent width0.1nmspect.line.eqWidth;em.line.HalphafloatnullablelogAge[6.3/7.8]? Log of Agelog(yr)time.agefloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/451/1307/listList of fits filesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNNumber of HII regions catalogued in this galaxymeta.numberintnullableRAJ2000Right ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainScale[0.197/0.201] Scale of the imagearcsec/pixinstr.scalefloatNx[1024] Number of pixels along X-axismeta.numberintNy[1024] Number of pixels along Y-axismeta.numberintNz[48]? Number of slices for datacubesmeta.numberintnullableV.min[557/4574]? Lower value of velocity interval for datacubeskm/sphys.velocdoublenullableV.max[946/4952]? Upper value of velocity interval for datacubeskm/sphys.velocdoublenullabledV[8/8.3]? Velocity resolution for datacubeskm/sspect.resolutiondoublenullableSize[4103/196619] Size of FITS fileKibytephys.size;meta.fitsintfitsDownload the FITS filemeta.ref.urlcharFileNameName of the file, in subdirectory "fits"meta.id;meta.filechar