J/PASP/135/J4101ivo://CDS.VizieR/J/PASP/135/J4101doi:10.26093/cds/vizier.61363101CDSLei F.-J.Wu H.2025-09-09T14:15:23Z2024-05-02T08:38:34ZCDS support team

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

cds-question@unistra.frstar-forming-regionsvisible-astronomyh-alpha-photometryWe analyzed the star formation surface density ({SIGMA}_SFR_) between the global and HII regions in a sample of 69 low surface brightness galaxies (LSBGs) and 68 star-forming (SF) galaxies using data from the H{alpha} images. The conventional global {SIGMA}_SFR_, which is defined as the star formation rate (SFR) divided by the area of the global galaxy, may not accurately describe the star formation activity in LSBGs due to the lower number of HII regions compared to SF galaxies. To address this, we divide the global galaxy into two regions, the HII region and the diffuse region, and then study the {SIGMA}_SFR_ in each region. Our results show that both the SFR and area of the HII regions in LSBGs are lower than those in SF galaxies, resulting in the HII region's {SIGMA}_SFR_ (SFR/area) being slightly lower in LSBGs than in SF galaxies by 0.28dex, although the global {SIGMA}_SFR_ is at least an order of magnitude lower in LSBGs than in SF galaxies. Furthermore, a significant difference exists between the global and HII regions in {SIGMA}_SFR_. In LSBGs, {SIGMA}_SFR_ increased by 0.80dex from the global region to the HII region, while SF galaxies demonstrate a 0.54dex increase, highlighting the crucial aspect of carefully selecting an appropriate aperture for {SIGMA}_SFR_ calculations.2023PASP..135j4101Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PASP/135/J4101CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PASP/135/J4101https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PASP/135/J4101http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PASP/135/J4101https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PASP/135/J4101https://vizier.iucaa.in/viz-bin/votable?-source=J/PASP/135/J4101http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PASP/135/J4101GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/PASP/135/J4101/table1 (The star formation properties of our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/PASP/135/J4101/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/PASP/135/J4101/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/PASP/135/J4101/table1?GETtext/xml+votable180.050000true8.603291124.60386190.0055555555555555566/549-551 553-555 640 2181 4230 4293 4815 4837 4839 4844 4850-4851 4859 4901 4914 4930 4994 4996 4998-4999 5008 5024 5168 5186-5187 5200 5254 8221 8320 8371 8480 8665 8681-8682 8919 8940 8942 9006 9009 9014 9024 9028 9257 9276 10260 10265 10268 10292 10297 10320 10378 13413 13423 13432 18393-18394 18405 18410 19413 19417-19418 19429-19430 19432-19433 19647 19673 19675 19741 19840 19942 19994 20006 20011 20017 20020 20248 20281 20416 20424 21991 22372 26069 26403 26437 26445 26453 26456 26532 27098 27126 27487 27579 27803 27837 27862 27883 28122 28134 28367 28371 28375 28377 28382 28404-28406 28411 28446 28451 28453-28455 28458-28461 28549 28576 31423 31620https://cdsarc.cds.unistra.fr/viz-bin/moc/J/PASP/135/J4101?format=asciiOpticaldefaultJ/PASP/135/J4101/table1The star formation properties of our sampleSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAGCAGC numbermeta.id;meta.mainintTypeTypesrc.classcharDistDistanceMpcpos.distancefloate_DistDistance errorMpcstat.errorfloatlogSFRGRGlobal region star formation ratesolMass/yrphys.SFR;obs.fieldfloate_logSFRGRGlobal region star formation rate errorsolMass/yrstat.errorfloatlogAreaGRGlobal region areakpc**2phys.areafloate_logAreaGRGlobal region area errorkpc**2stat.errorfloatlogSigmaSFRGRGlobal region star formation surface densitysolMass.yr**-1.kpc**-1src.densityfloate_logSigmaSFRGRGlobal region star formation surface density errorsolMass.yr**-1.kpc**-1stat.errorfloatlogSFRHIIHII region star formation ratesolMass/yrphys.SFR;obs.fieldfloate_logSFRHIIHII region star formation rate errorsolMass/yrstat.errorfloatlogAreaHIIHII region areakpc**2phys.areafloate_logAreaHIIHII region area errorkpc**2stat.errorfloatlogSigmaSFRHIIHII region star formation surface densitysolMass.yr**-1.kpc**-1src.densityfloate_logSigmaSFRHIIHII region star formation surface density errorsolMass.yr**-1.kpc**-1stat.errorfloatlogSFRDRDiffuse region star formation ratesolMass/yrphys.SFR;obs.fieldfloate_logSFRDRDiffuse region star formation rate errorsolMass/yrstat.errorfloatlogAreaDRDiffuse region areakpc**2phys.areafloate_logAreaDRDiffuse region area errorkpc**2stat.errorfloatlogSigmaSFRDRDiffuse region star formation surface densitysolMass.yr**-1.kpc**-1src.densityfloate_logSigmaSFRDRDiffuse region star formation surface density errorsolMass.yr**-1.kpc**-1stat.errorfloat_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