J/ApJ/705/14ivo://CDS.VizieR/J/ApJ/705/14doi:10.26093/cds/vizier.17050014CDSDeo R.P.Richards G.T.Crenshaw D.M.Kraemer S.B.2017-07-04T07:08:49Z2011-12-13T07:49:45ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiseyfert-galaxiesinfrared-astronomyspectroscopyAn analysis of archival mid-infrared (mid-IR) spectra of Seyfert galaxies from the Spitzer Space Telescope observations is presented. We characterize the nature of the mid-IR active nuclear continuum by subtracting a template starburst spectrum from the Seyfert spectra. The long wavelength part of the spectrum contains a strong contribution from the starburst-heated cool dust; this is used to effectively separate starburst-dominated Seyferts from those dominated by the active nuclear continuum. Within the latter category, the strength of the active nuclear continuum drops rapidly beyond ~20um. On average, type 2 Seyferts have weaker short-wavelength active nuclear continua as compared to type 1 Seyferts. Type 2 Seyferts can be divided into two types, those with strong polycyclic aromatic hydrocarbon (PAH) bands and those without.2009ApJ...705...14Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/705/14CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/248 : Quasars and Active Galactic Nuclei (12th Ed.) (Veron+ 2006)VII/173 : Catalogue of Seyfert Galaxies (Lipovetsky+, 1988)J/A+A/473/369 : VISIR/VLT mid-infrared imaging of Seyfert nuclei (Haas+,J/A+A/418/465 : Mid-infrared and hard X-ray emission in AGN (Lutz+, 2004)J/ApJS/125/349 : Morphology of 12micron Seyfert Galaxies (Hunt+, 1999)J/other/PBeiO/18.7 : Far infrared Seyfert galaxies (Liu 1991)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/705/14https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/705/14http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/705/14https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/705/14https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/705/14http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/705/14GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/705/14/catalog (Seyfert galaxies studied: optical and mid-IR properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/705/14/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/705/14/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/705/14/catalog?GETtext/xml+votable180.050000true146.06858339.7710.0055555555555555566/909 941 2251 2564 4352 4439 4488 4992 5284 5795 5975 6458 6977 7132 7214 7424 7522 7642 7713 7869 7921 8492 8675 8845 8922 9231 9632 9882 10364 10404 10501 10817 10912 10927 11029 11416 11490 12306 17061 17183 17525 17529 17748 18246 18783 18794 18919 19283 19296 19619 19883 20230 21016 22638 22654 23171 23233 24896 25054 25083 25135 25518 25610 25790 25907 26148 26932 27191 27767 27914 27945 28517 28574 28593 28609 31259 32931 33034 34294 34531 34534 35447 35623 36618 36668 36716 36733 36861 40221 40410 43677 43748 43806 43877 43925 44507 45779 45816 45883 46399 46442 46481 46615 46811 46987 47047 474156.6214843819315255e-21 3.6117180714086103e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/705/14?format=asciiInfrareddefaultJ/ApJ/705/14/table3Starburst-to-AGN flux density ratiosrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharR5.5? Starbust-to-AGN flux density ratio at 5.5um (1)phot.flux;arith.ratiofloatnullableR10? Starbust-to-AGN flux density ratio at 10um (1)phot.flux;arith.ratiofloatnullableR14.7? Starbust-to-AGN flux density ratio at 14.7um (1)phot.flux;arith.ratiodoublenullableR20? Starbust-to-AGN flux density ratio at 20um (1)phot.flux;arith.ratiodoublenullableR30? Starbust-to-AGN flux density ratio at 30um (1)phot.flux;arith.ratiofloatnullableJ/ApJ/705/14/catalogSeyfert galaxies studied: optical and mid-IR propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharprimarySBSimbad column added by the CDSmeta.ref.urlcharzNED redshiftsrc.redshiftfloatSyTSeyfert type (1)src.classcharb/aAxial ratio (2)phys.angSize;arith.ratiofloatAORSpitzer archive AOR numbermeta.id;obsintObs[SM] Observing mode for Spitzer/IRS spectrum: (S=staring or M=mapping)meta.code;obscharAp1? First extraction aperturearcsecinstr.fovfloatnullableAp2? Second extraction aperturearcsecinstr.fovfloatnullablescaleRadial extent of the extraction aperture for the galaxypc/arcsecphys.angSize;srcfloatVVDisplay the Quasars and AGN data (Veron et al. 2010, Cat. VII/258)meta.ref.urlcharNEDSimbad column added by the CDSchar5.5um? Spitzer/IRS 5.5um continuum flux densityJyphot.flux.density;em.IR.4-8umdoublenullablee_5.5um? 1{sigma} error in 5.5umJystat.errordoublenullable10um? Spitzer/IRS 10um continuum flux densityJyphot.flux.density;em.IR.8-15umdoublenullablee_10um? 1{sigma} error in 10umJystat.errordoublenullable14.7um? Spitzer/IRS 14.7um continuum flux densityJyphot.flux.density;em.IR.8-15umdoublenullablee_14.7um? 1{sigma} error in 14.7umJystat.errordoublenullable20um? Spitzer/IRS 20um continuum flux densityJyphot.flux.density;em.IR.15-30umdoublenullablee_20um? 1{sigma} error in 20umJystat.errordoublenullable30um? Spitzer/IRS 30um continuum flux densityJyphot.flux.density;em.IR.15-30umdoublenullablee_30um? 1{sigma} error in 30umJystat.errordoublenullabletau? Observed optical depth (apparent) at 9.7umphys.absorption.opticalDepthfloatnullable_RAPositions from Simbad (many galaxies have no position in the original table) (right ascension part)degpos.eq.ra;meta.main_DEPositions from Simbad (many galaxies have no position in the original table) (declination part)degpos.eq.dec;meta.mainRAdeg? Extraction rectangle for mapping mode: right ascension in decimal degrees (J2000) (3)degpos.eq.ranullableDEdeg? Extraction rectangle for mapping mode: declination in decimal degrees (J2000) (3)degpos.eq.decdoublenullableSimbadNameSimbad column added by the CDSchar