J/MNRAS/504/6198ivo://CDS.VizieR/J/MNRAS/504/6198doi:10.26093/cds/vizier.75046198CDSMiura R.EEspada DHirota AHenkel CVerley SKobayashi M.I.N,Matsushita SIsrael F.PVila-Vilaro BMorokuma-Matsui KOtt J,Vlahakis CPeck A.BAalto SHogerheijde M.RNeumayer NIono D,Kohno KTakemura HKomugi S2025-07-18T20:16:58Z2024-06-07T12:26:10ZCDS support team

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

cds-question@unistra.frmolecular-cloudsradio-galaxiesradio-astronomymillimeter-astronomysubmillimeter-astronomyphotometryWe present the first census of giant molecular clouds (GMCs) complete down to 106 M_{sun}_ and within the inner 4 kpc of the nearest giant elliptical and powerful radio galaxy, Centaurus A. We identified 689 GMCs using CO(1-0) data with 1 arcsec spatial resolution (~20 pc) and 2 km/s velocity resolution obtained with the Atacama Large Millimeter/submillimeter Array. The I(CO)-N(H2) conversion factor based on the virial method is X_CO_ = (2 +/- 1) * 10^20 cm^-2^/(K.km/s) for the entire molecular disc, consistent with that of the discs of spiral galaxies including the Milky Way, and XCO = (5 +/- 2) * 10^20^cm^-2^/(K.km/s) for the circumnuclear disc (CND; within a galactocentric radius of 200 pc). We obtained the GMC mass spectrum distribution and find that the best truncated power-law fit for the whole molecular disc, with index {gamma} {prop.to} -2.41 +/- 0.02 and upper cut-off mass ~ 1.3* 10^7^ M_{sun}_, is also in agreement with that of nearby disc galaxies. A trend is found in the mass spectrum index from steep to shallow as we move to inner radii. Although the GMCs are in an elliptical galaxy, the general GMC properties in the molecular disc are as in spiral galaxies. However, in the CND, large offsets in the line-width-size scaling relations (~0.3 dex higher than those in the GMCs in the molecular disc), a different XCO factor, and the shallowest GMC mass distribution shape ({gamma} = -1.1 +/- 0.2) all suggest that there the GMCs are most strongly affected by the presence of the active galactic nucleus and/or shear motions.2021MNRAS.504.6198Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/504/6198CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/686/948 : CO in extragalactic giant molecular clouds (Bolatto+, 2008)J/ApJS/197/16 : CO observations of LMC molecular clouds (MAGMA). (Wong+, 2011)J/ApJ/699/1092 : Giant molecular clouds (SRBY) (Heyer+, 2009)J/ApJ/857/19 : ALMA view of GMCs in NGC 300 (Faesi+, 2018)J/ApJ/803/16 : Giant molecular clouds in NGC4526 based on ^12^COJ/ApJ/864/120 : ALMA obs. toward NGC 5253. I. Molecular clouds (Miura+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/504/6198https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/504/6198http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/504/6198https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/504/6198https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/504/6198http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/504/6198GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/504/6198/table1 (Properties of GMCs in the Molecular Disc of Cen A)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/504/6198/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/504/6198/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/504/6198/table1?GETtext/xml+votable180.050000true201.4019997-43.03227330.0055555555555555566/43262https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/504/6198?format=asciiMillimeterRadiodefaultJ/MNRAS/504/6198/table1Properties of GMCs in the Molecular Disc of Cen ArecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDGMC index number (ID) (1)meta.id;meta.mainintdRARelative position in RA (deltaRA) (2)arcsecpos.eq.ra;arith.difffloatdDERelative position in Decl (deltaDE) (2)arcsecpos.eq.dec;arith.difffloatvLSRLocal Standard of Rest velocity (vLSR)km/sphys.veloc;pos.lsrintsigmaUncertainty in VLSR (sigmaV)km/sstat.error;phys.veloc;pos.lsrfloate_sigmaVelocity dispersion (e_sigmaV)km/sstat.errorfloatMajAxisMajor axis size (sigmaMaj) (3)pcphys.sizeintMinAxisMinor axis size (sigmaMin) (3)pcphys.sizeintPA[] Position angle (PA) (4)degpos.posAngintRvir? Virial radius (R) (5)pcphys.size.radiusintnullablee_Rvir? Mean error on Rvir (e_R)pcstat.errorintnullableSIntegrated CO(1-0) line flux density (S)Jy.km/sphot.fluxfloate_SMean error on S (e_S)Jy.km/sstat.errorfloatMvir? Virial mass (Mass) (5)10000solMassphys.massintnullablee_Mvir? Mean error on Mvir (e_Mass)10000solMassstat.errorintnullableRegionLocated region (Region) (6)meta.notechar_RAComputed Right Ascension for Equinox: J2000degpos.eq.ra;meta.main_DEComputed Declination for Equinox: J2000degpos.eq.dec;meta.main