S^4^MC project: 6 star forming regions PAHs

S^4^MC project: 6 star forming regions PAHsJ/ApJ/744/20ivo://CDS.VizieR/J/ApJ/744/20doi:10.26093/cds/vizier.17440020CDSSandstrom K.M.Bolatto A.D.Bot C.Draine B.T.Ingalls J.G.,Israel F.P.Jackson J.M.Leroy A.K.Li A.Rubio M.Simon J.D.,Smith J.D.T.Stanimirovic S.Z.Tielens A.G.G.M.van Loon J.T.2017-09-29T09:03:54Z2013-08-01T12:59:08ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsinterstellar-mediuminfrared-astronomyspectroscopyh-ii-regionsWe present results of mid-infrared spectroscopic mapping observations of six star-forming regions in the Small Magellanic Cloud (SMC) from the Spitzer Spectroscopic Survey of the SMC (S^4^MC). We detect the mid-IR emission from polycyclic aromatic hydrocarbons (PAHs) in all of the mapped regions, greatly increasing the range of environments where PAHs have been spectroscopically detected in the SMC. We investigate the variations of the mid-IR bands in each region and compare our results to studies of the PAH bands in the SINGS sample and in a sample of low-metallicity starburst galaxies. PAH emission in the SMC is characterized by low ratios of the 6-9um features relative to the 11.3um feature and weak 8.6 and 17.0um features. Interpreting these band ratios in the light of laboratory and theoretical studies, we find that PAHs in the SMC tend to be smaller and less ionized than those in higher metallicity galaxies.2012ApJ...744...20Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/744/20CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/515/A56 : NGC 346/N66 JHKs photometry (Gouliermis+, 2010)J/ApJS/190/233 : Spectroscopy & abundances of SINGS galaxies (Moustakas+, 2010)J/ApJ/723/895 : IR luminosities and aromatic features of 5MUSES (Wu+, 2010)J/ApJ/705/885 : PAH in galaxies at z~0.1 (O'Dowd+, 2009)J/ApJ/656/770 : Mid-IR spectrum of star-forming galaxies (Smith+, 2007)J/ApJ/669/327 : S3MC: YSOs in N66, in SMC (Simon+, 2007)J/ApJ/655/212 : S3MC IRAC and MIPS photometry (Bolatto+, 2007)J/A+A/469/575 : Spitzer mid-IR spectra of 3 molecular clouds (Berne+, 2007)J/A+A/401/873 : The SMC in the Far Infrared (Wilke+, 2003)J/ApJ/566/880 : ISO-SWS observations of H II regions (Giveon+, 2002)J/AJ/123/855 : Magellanic Clouds Phot. Survey: the SMC (Zaritsky+, 2002)http://irsa.ipac.caltech.edu/data/SPITZER/docs/ : Spitzer home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/744/20https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/744/20http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/744/20https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/744/20https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/744/20http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/744/20GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/744/20/table1 (S^4^MC (Spitzer Spectroscopic Survey of the SMC) observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/744/20/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/744/20/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/744/20/table1?GETtext/xml+votable180.050000true11.34583-73.366670.005555555555555556Cone search capability for table J/ApJ/744/20/table2 (Spectral fit results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/744/20/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/744/20/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/744/20/table2?GETtext/xml+votable180.050000true11.89183389-73.313253890.0055555555555555566/33294 33295 33298 33304 33317 33328https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/744/20?format=asciiInfrareddefaultJ/ApJ/744/20/table1S^4^MC (Spitzer Spectroscopic Survey of the SMC) observationsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsObservation type: LL=long low, SL=short lowinstr.setupcharNameRegion namemeta.id;obs.fieldcharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainDateObservation datetime.epoch;obsnullableAORSpitzer Astronomical Observation numbermeta.id;obsintRegRegion abbreviation as in table 2 (column added by CDS)obs.fieldcharprimary

J/ApJ/744/20/table2Spectral fit resultsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRegRegion Name (nNN, smcb or swN)meta.id;obs.fieldcharNum[1/114] Extraction region numbermeta.idintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainF6.2The 6.2um dust feature intensity1e-08W.m**-2.sr**-1spect.line.intensitydoublee_F6.2Uncertainty in F6.21e-08W.m**-2.sr**-1stat.errordoublecF6.2Corrected F6.21e-08W.m**-2.sr**-1spect.line.intensitydoublee_cF6.2Uncertainty in cF6.21e-08W.m**-2.sr**-1stat.errordoubleF7.7The 7.7um Complex dust feature intensity1e-08W.m**-2.sr**-1spect.line.intensitydoublee_F7.7Uncertainty in F7.71e-08W.m**-2.sr**-1stat.errordoublecF7.7Corrected F7.71e-08W.m**-2.sr**-1spect.line.intensitydoublee_cF7.7Uncertainty in cF7.71e-08W.m**-2.sr**-1stat.errordoubleF8.3The 8.3um dust feature intensity1e-08W.m**-2.sr**-1spect.line.intensitydoublee_F8.3Uncertainty in F8.31e-08W.m**-2.sr**-1stat.errordoublecF8.3Corrected F8.31e-08W.m**-2.sr**-1spect.line.intensitydoublee_cF8.3Uncertainty in cF8.31e-08W.m**-2.sr**-1stat.errordoubleF8.6The 8.6um dust feature intensity1e-08W.m**-2.sr**-1spect.line.intensitydoublee_F8.6Uncertainty in F8.61e-08W.m**-2.sr**-1stat.errordoublecF8.6Corrected F8.61e-08W.m**-2.sr**-1spect.line.intensitydoublee_cF8.6Uncertainty in CF8.61e-08W.m**-2.sr**-1stat.errordoubleF11.3The 11.3um dust feature intensity1e-08W.m**-2.sr**-1spect.line.intensitydoublee_F11.3Uncertainty in F11.31e-08W.m**-2.sr**-1stat.errordoublecF11.3Corrected F11.31e-08W.m**-2.sr**-1spect.line.intensitydoublee_cF11.3Uncertainty in cF11.31e-08W.m**-2.sr**-1stat.errordoubleF12.0The 12.0um dust feature intensity1e-08W.m**-2.sr**-1spect.line.intensitydoublee_F12.0Uncertainty in F12.01e-08W.m**-2.sr**-1stat.errordoublecF12.0Corrected F12.01e-08W.m**-2.sr**-1spect.line.intensitydoublee_cF12.0Uncertainty in cF12.01e-08W.m**-2.sr**-1stat.errordoubleF12.6The 12.6um dust feature intensity1e-08W.m**-2.sr**-1spect.line.intensitydoublee_F12.6Uncertainty in F12.61e-08W.m**-2.sr**-1stat.errordoublecF12.6Corrected F12.61e-08W.m**-2.sr**-1spect.line.intensitydoublee_cF12.6Uncertainty in cF12.61e-08W.m**-2.sr**-1stat.errordoubleF13.6The 13.6um dust feature intensity1e-08W.m**-2.sr**-1spect.line.intensitydoublee_F13.6Uncertainty in F13.61e-08W.m**-2.sr**-1stat.errordoublecF13.6Corrected F13.61e-08W.m**-2.sr**-1spect.line.intensitydoublee_cF13.6Uncertainty in cF13.61e-08W.m**-2.sr**-1stat.errordoubleF17.0The 17.0um Complex dust feature intensity1e-08W.m**-2.sr**-1spect.line.intensitydoublee_F17.0Uncertainty in F17.01e-08W.m**-2.sr**-1stat.errordoublecF17.0Corrected F17.01e-08W.m**-2.sr**-1spect.line.intensitydoublee_cF17.0Uncertainty in cF17.01e-08W.m**-2.sr**-1stat.errordoubleNeIIThe [Ne II] line intensity (12.8um)1e-08W.m**-2.sr**-1spect.line.intensitydoublee_NeIIUncertainty in NeII1e-08W.m**-2.sr**-1stat.errordoublecNeIICorrected NeII1e-08W.m**-2.sr**-1spect.line.intensitydoublee_cNeIIUncertainty in cNeII1e-08W.m**-2.sr**-1stat.errordoubleNeIIIThe [Ne III] line intensity (15.6um)1e-08W.m**-2.sr**-1spect.line.intensitydoublee_NeIIIUncertainty in NeIII1e-08W.m**-2.sr**-1stat.errordoublecNeIIICorrected NeIII1e-08W.m**-2.sr**-1spect.line.intensitydoublee_cNeIIIUncertainty in cNeIII1e-08W.m**-2.sr**-1stat.errordouble