J/ApJ/851/76ivo://CDS.VizieR/J/ApJ/851/76doi:10.26093/cds/vizier.18510076CDSMcCoy M.Ott J.Meier D.S.Muller S.Espada D.Martin S.Israel F.P.,Henkel C.Impellizzeri V.Aalto S.Edwards P.G.Brunthaler A.,Neumayer N.Peck A.B.van der Werf P.Feain I.2018-10-09T09:01:34Z2018-09-10T12:39:49ZCDS support team

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

cds-question@unistra.frgalaxiesinterferometrymillimeter-astronomysubmillimeter-astronomyinterstellar-mediummolecular-physicsCentaurus A, with its gas-rich elliptical host galaxy, NGC 5128, is the nearest radio galaxy at a distance of 3.8Mpc. Its proximity allows us to study the interaction among an active galactic nucleus, radio jets, and molecular gas in great detail. We present ALMA observations of low-J transitions of three CO isotopologues, HCN, HCO+, HNC, CN, and CCH toward the inner projected 500pc of NGC 5128. Our observations resolve physical sizes down to 40pc. By observing multiple chemical probes, we determine the physical and chemical conditions of the nuclear interstellar medium of NGC 5128. This region contains molecular arms associated with the dust lanes and a circumnuclear disk (CND) interior to the molecular arms. The CND is approximately 400pc by 200pc and appears to be chemically distinct from the molecular arms. It is dominated by dense gas tracers while the molecular arms are dominated by ^12^CO and its rare isotopologues. The CND has a higher temperature, elevated CN/HCN and HCN/HNC intensity ratios, and much weaker ^13^CO and C^18^O emission than the molecular arms. This suggests an influence from the AGN on the CND molecular gas. There is also absorption against the AGN with a low velocity complex near the systemic velocity and a high velocity complex shifted by about 60km/s. We find similar chemical properties between the CND in emission and both the low and high velocity absorption complexes, implying that both likely originate from the CND. If the HV complex does originate in the CND, then that gas would correspond to gas falling toward the supermassive black hole.2017ApJ...851...76Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/851/76CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/412/657 : CO in cooling flow of clusters of galaxies (Salome+, 2003)J/A+A/532/A117 : AMIGA VIII. Flux ratio asymmetry parameter (Espada+, 2011)J/A+A/573/A111 : Group-dominant elliptical galaxies CO sp. (O'Sullivan+, 2015)J/A+A/593/A118 : HCN(1-0) cube for the nucleus of M51 (Querejeta+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/851/76https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/851/76http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/851/76https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/851/76https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/851/76http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/851/76GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/851/76/table2 (Properties of emission components)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/851/76/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/851/76/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/851/76/table2?GETtext/xml+votable180.050000true201.36659583-43.017088610.0055555555555555566/43262https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/851/76?format=asciiMillimeterdefaultJ/ApJ/851/76/table3Ratios of selected molecular transitionsLineLine identifiermeta.id;spect.linecharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCompDisplay the emission component data for this line (link to table 2)meta.ref.urlcharl_R1Limit flag on R1 (1)meta.code.errorcharR1[0.8/43]? Ratio of ^12^CO(2-1) to ^13^CO(2-1)spect.line.intensity;arith.ratiofloatnullablee_R1[0.3/5]? R1 uncertaintystat.errorfloatnullablel_R2Limit flag on R2 (1)meta.code.errorcharR2[2/144.1]? Ratio of ^12^CO(2-1) to C^18^O(2-1)spect.line.intensity;arith.ratiofloatnullablee_R2[1/62]? R2 uncertaintystat.errorfloatnullablel_R3Limit flag on R3 (1)meta.code.errorcharR3[0.1/5.1]? Ratio of ^13^CO(2-1) to ^13^CO(1-0)spect.line.intensity;arith.ratiofloatnullablee_R3[0.2/0.4]? R3 uncertaintystat.errorfloatnullablel_R4Limit flag on R4 (1)meta.code.errorcharR4[0.5/9.8]? Ratio of C^18^O(2-1) to C^18^O(1-0)spect.line.intensity;arith.ratiofloatnullablel_R5Limit flag on R5 (1)meta.code.errorcharR5[0.3/22]? Ratio of ^13^CO(2-1) to C^18^O(2-1)spect.line.intensity;arith.ratiofloatnullablee_R5[0.6/12.1]? R5 uncertaintystat.errorfloatnullablel_R6Limit flag on R6 (1)meta.code.errorcharR6[0.1/8.4]? Ratio of ^13^CO(1-0) to HCN(1-0)spect.line.intensity;arith.ratiofloatnullablee_R6[0.8/3]? R6 uncertaintystat.errorfloatnullablel_R7Limit flag on R7 (1)meta.code.errorcharR7[0.5/0.8]? Ratio of HCN(1-0) to HCO+(1-0)spect.line.intensity;arith.ratiofloatnullablee_R7[0.1/0.3]? R7 uncertaintystat.errorfloatnullablel_R8Limit flag on R8 (1)meta.code.errorcharR8[1.4/3.5]? Ratio of HCN(1-0) to HNC(1-0)spect.line.intensity;arith.ratiofloatnullablee_R8[0.3/0.9]? R8 uncertaintystat.errorfloatnullablel_R9Limit flag on R9 (1)meta.code.errorcharR9[1.7/4.3]? Ratio of HCN(1-0) to CN(1-0)spect.line.intensity;arith.ratiofloatnullablee_R9[0.2/1.3]? R9 uncertaintystat.errorfloatnullablel_R10Limit flag on R10 (1)meta.code.errorcharR10[1.3/7]? Ratio of HCN(1-0) to CCH(1-0)spect.line.intensity;arith.ratiofloatnullablee_R10[0.7/1]? R10 uncertaintystat.errorfloatnullableJ/ApJ/851/76/table2Properties of emission componentsTransTransitionmeta.id;phys.atmol.transitionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLineLine identifiermeta.id;spect.linecharf_Line[b] b: Line attributed to the circumnuclear disk (CND)meta.codecharRAJ2000[13] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[43] Degree of Declination (J2000)pos.eq.dec;meta.mainl_PeakThe 1{sigma} limit flag on Peakmeta.code.errorcharPeak[0.01/2.2] Peak temperatureKphys.temperaturefloate_Peak[0.01/0.2]? Uncertainty in PeakKstat.error;stat.maxfloatnullableCen[359/727]? Line centerkm/sspect.dopplerVelocfloatnullablee_Cen[0.2/12]? Uncertainty in Cenkm/sstat.errorfloatnullableFWHM[2/105]? Full-Width at Half-Maximum of linekm/sspect.line.widthfloatnullablee_FWHM[0.5/31]? Uncertainty in FWHMkm/sstat.error;phys.angSizefloatnullableInt[0.3/101]? Integrated fluxK.km/sphot.flux.density;em.radiofloatnullablee_Int[0.1/7]? Uncertainty in IntK.km/sstat.errorfloatnullable