J/ApJ/934/27ivo://CDS.VizieR/J/ApJ/934/27doi:10.26093/cds/vizier.19340027CDSStone M.Pope A.McKinney J.Armus L.Diaz-Santos T.Inami H.,Kirkpatrick A.Stierwalt S.2024-11-06T20:26:28Z2024-07-30T14:14:16ZCDS support team

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

cds-question@unistra.frgalaxiesinfrared-sourcesinfrared-astronomyspectroscopyWe present the results of a stacking analysis performed on Spitzer/Infrared Spectrograph high-resolution mid-infrared (mid-IR) spectra of luminous infrared galaxies (LIRGs) in the Great Observatories All-Sky LIRG Survey. By binning in relation to mid-IR active galactic nucleus (AGN) fraction and stacking spectra, we detect bright emission lines [NeII] and [NeIII], which trace star formation, and fainter emission lines [NeV] and [OIV], which trace AGN activity, throughout the sample. We find that the [NeII] luminosity is fairly constant across all AGN fraction bins, while the [OIV] and [NeV] luminosities increase by over an order of magnitude. Our measured average line ratios, [NeV]/[NeII] and [OIV]/[NeII], at low AGN fraction are similar to HII galaxies, while the line ratios at high AGN fraction are similar to LINERs and Seyferts. We decompose the [OIV] luminosity into star formation and AGN components by fitting the [OIV] luminosity as a function of the [NeII] luminosity and the mid-IR AGN fraction. The [OIV] luminosity in LIRGs is dominated by star formation for mid-IR AGN fractions <~0.3. With the corrected [OIV] luminosity, we calculate black hole accretion rates (BHARs) ranging from 10^-5^M_{sun}_/yr at low AGN fractions to 0.2M_{sun}_/yr at the highest AGN fractions. We find that using the [OIV] luminosity, without correcting for star formation, can lead to overestimation of the BHAR by up to a factor of 30 in starburst-dominated LIRGs. Finally, we show that the BHAR/star formation rate ratio increases by more than three orders of magnitude as a function of mid-IR AGN fraction in LIRGs.2022ApJ...934...27Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/934/27CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AJ/126/1607 : IRAS Revised Bright Galaxy Sample (Sanders+, 2003)J/ApJ/656/770 : Mid-IR spectrum of star-forming galaxies (Smith+, 2007)J/ApJS/182/628 : Spitzer quasar and ULIRG evolution study (Veilleux+, 2009)J/ApJ/723/993 : Spatial extent of LIRGs in the MIR. I. (Diaz-Santos+, 2010)J/ApJ/725/2270 : Mid-IR emission lines in AGNs (Pereira-Santaella+, 2010)J/ApJ/709/1257 : Spitzer-IRS sp. of Seyfert galaxies. II. (Tommasin+, 2010)J/ApJ/741/32 : Spatial extent of LIRGs in the MIR. II. (Diaz-Santos+, 2011)J/ApJ/777/156 : Spitzer/IRS sp. of GOALS luminous IR galaxies (Inami+, 2013)J/ApJS/206/1 : Mid-IR properties of GOALS nearby LIRGs (Stierwalt+, 2013)J/ApJ/790/124 : Dust and gas physics of the GOALS sample (Stierwalt+, 2014)J/A+A/574/A4 : Radio image of Luminous IR Galaxies (Vardoulaki+, 2015)J/ApJ/846/32 : Herschel FIR spectra of GOALS galaxies (Diaz-Santos+, 2017)J/MNRAS/487/1823 : MIR spectra of AGNs heating molecular gas (Lambrides+, 2019)http://irsa.ipac.caltech.edu/data/GOALS/ : GOALS IRSA data accesshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/934/27https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/934/27http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/934/27https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/934/27https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/934/27http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/934/27GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/ApJ/934/27/table1Properties of our six mid-IR AGN fraction binsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBinBin numbermeta.id;meta.maincharNgal[20/41] Number of galaxiesmeta.numberintfmir[0.1/0.96] Median mid-IR AGN fraction (1)stat.fit.paramfloatb_fmir[0/0.81] fmir lower limit (1)meta.notefloatB_fmir[0.15/1] fmir upper limit (1)meta.notefloatMedLIR[11.25/12] Median IR luminosityphys.luminosity;em.IRfloatb_MedLIR[11.1/11.4] MedLIR lower limitmeta.notefloatB_MedLIR[11.5/12] MedLIR upper limitmeta.notefloatDist[86/148.5] Median luminosity distanceMpcpos.distancefloatb_Dist[69.9/87.3] Dist lower limitMpcpos.distance;stat.minfloatB_Dist[112.5/197.3] Dist upper limitMpcpos.distance;stat.maxfloatSH-LH[1.2/1.6] Median SH-LH scale factorarith.factorfloatb_SH-LH[1.1/1.3] SH-LH lower limitmeta.notefloatB_SH-LH[1.3/2] SH-LH upper limitmeta.notefloatJ/ApJ/934/27/fig2Spitzer/IRS spectra for our 6 bins of AGN fractionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda[9.89/36.5] Wavelengthumem.wldoubleFlux1[0.08/6.2] Bin 1 flux densityJyphot.flux;arith.ratiodoublee_Flux1[0.002/0.61] Uncertainty in Flux1Jystat.errordoubleFlux2[0.07/5.1]? Bin 2 flux densityJyphot.flux;arith.ratiodoublenullablee_Flux2[0.001/0.4]? Uncertainty in Flux2Jystat.errordoublenullableFlux3[0.066/6.3] Bin 3 flux densityJyphot.flux;arith.ratiodoublee_Flux3[0.0029/0.4] Uncertainty in Flux3Jystat.errordoubleFlux4[0.06/5.1] Bin 4 flux densityJyphot.flux;arith.ratiodoublee_Flux4[0.002/0.4] Uncertainty in Flux4Jystat.errordoubleFlux5[0.086/5.6]? Bin 5 flux densityJyphot.flux;arith.ratiodoublenullablee_Flux5[0.004/0.5]? Uncertainty in Flux5Jystat.errordoublenullableFlux6[0.16/7.6]? Bin 6 flux densityJyphot.flux;arith.ratiodoublenullablee_Flux6[0.006/1.5]? Uncertainty in Flux6Jystat.errordoublenullable