J/A+A/618/A126ivo://CDS.VizieR/J/A+A/618/A126doi:10.26093/cds/vizier.36180126CDSO'Sullivan E.Combes F.Salome P.David L.P.Babul A.Vrtilek J.M.,Lim J.Olivares V.Raychaudhury S.Schellenberger G.2018-12-03T15:01:25Z2018-10-23T08:58:19ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyco-line-emissionWe present IRAM 30m and APEX telescope observations of CO(1-0) and CO(2-1) lines in 36 group-dominant early-type galaxies, completing our molecular gas survey of dominant galaxies in the Complete Local-volume Groups Sample. We detect CO emission in 12 of the galaxies at >4{sigma} significance, with molecular gas masses in the range 0.01-6x10^8^M_{sun}_, as well as CO in absorption in the non-dominant group member galaxy NGC 5354. In total 21 of the 53 CLoGS dominant galaxies are detected in CO and we confirm our previous findings that they have low star formation rates (0.01-1M_{sun}_/yr) but short depletion times (<1Gyr) implying rapid replenishment of their gas reservoirs. Comparing molecular gas mass with radio luminosity, we find that a much higher fraction of our group-dominant galaxies (60+/-16%) are AGN-dominated than is the case for the general population of ellipticals, but that there is no clear connection between radio luminosity and the molecular gas mass. Using data from the literature, we find that at least 27 of the 53 CLoGS dominant galaxies contain HI, comparable to the fraction of nearby non-cluster early type galaxies detected in HI and significantly higher that the fraction in the Virgo cluster. We see no correlation between the presence of an X-ray detected intra-group medium and molecular gas in the dominant galaxy, but find that the HI-richest galaxies are located in X-ray faint groups. Morphological data from the literature suggests the cold gas component most commonly takes the form of a disk, but many systems show evidence of galaxy-galaxy interactions, indicating that they may have acquired their gas through stripping or mergers. We provide improved molecular gas mass estimates for two galaxies previously identified as being in the centres of cooling flows, NGC 4636 and NGC5846, and find that they are relatively molecular gas poor compared to our other detected systems.2018A&A...618A.126Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/618/A126CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/573/A111 : Group-dominant elliptical galaxies CO spectrahttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/618/A126https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/618/A126http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/618/A126https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/618/A126https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/618/A126http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/618/A126GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap9.276497240453405e-25 9.276497240453405e-25RadiodefaultJ/A+A/618/A126/table2Molecular data and stellar mass of the newly detected galaxiesCase[A/B] Sample (1)meta.codecharGalaxyGalaxy namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_Galaxy[d] Note on galaxy (2)meta.notecharLineObserved linemeta.id;spect.linecharl_ICOLimit flag on ICOmeta.code.errorcharICOCO intensityK.km/sphot.flux.density;em.line.COfloate_ICO? rms uncertainty on ICOK.km/sstat.errorfloatnullableV? Velocitykm/sspect.dopplerVelocfloatnullablee_V? rms uncertainty on Vkm/sstat.error;pos.cartesian.yfloatnullableDVFWHM (results of the Gaussian fits)km/sspect.line.widthfloate_DV? rms uncertainty on DVkm/sstat.errorfloatnullableTmb? Peak brightness temperature (results of the Gaussian fits)mKphys.temperaturefloatnullablee_Tmb? rms uncertainty on TmbmKstat.errorfloatnullablerms? rms Tmb for 50km/s channelmKstat.stdev;instr.det.noisefloatnullablel_L'COLimit flag on L'CO (3sigma upper limit)meta.code.errorcharL'CO? CO luminosity1e+08K.km.s**-1.pc**2phys.luminosityfloatnullablee_L'CO? rms uncertainty on L'CO1e+08K.km.s**-1.pc**2stat.errorfloatnullablel_M(H2)Limit flag on M(H2) (3sigma upper limit)meta.code.errorcharM(H2)? H_2_ mass (3)1e+08solMassphys.massfloatnullablee_M(H2)? rms uncertainty on H_2_ mass (3)1e+08solMassstat.errorfloatnullablespShow the spectrummeta.ref.urlcharFileNameName of the spectrum file in subdirectory spmeta.id;meta.filecharJ/A+A/618/A126/table1Basic data for the newly observed or processed group-dominant galaxieszRedshiftsrc.redshiftdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCase[A-D] sample (1)meta.codecharGalaxyGalaxy namemeta.id;meta.maincharDLLuminosity distanceMpcpos.distancefloatBeamFWHM CO(1-0) beam for IRAM observations, CO(2-1) beam for APEX observationskpcphys.angSize;obsfloatlogLBB-band luminosity (2)log(solLum)phys.luminosity;em.opt.BfloatD25Apparent major isophotal diameter at muB=25mag/arcsec2 (2)kpcphys.angSizefloatlogMdust? Dust mass (3)log(solMass)phys.massfloatnullablel_logM(HI)Limit flag on logM(HI)meta.code.errorcharlogM(HI)? HI mass (4)log(solMass)phys.massfloatnullablen_logM(HI)[i] Note on logM(HI) (5)meta.notecharlogLFIR? FIR luminosity (2)log(solLum)phys.luminosity;em.IRfloatnullablee_logLFIR? rms uncertainty on LFIRlog(solLum)stat.errorfloatnullablelogM*Stellar mass (6)log(solMass)phys.massfloatl_M(H2)Limit flag on M(H2)meta.code.errorcharM(H2)H2 mass (7)log(1e+08solMass)phys.massfloate_M(H2)? rms uncertainty on H2 masslog(1e+08solMass)stat.errorfloatnullablen_M(H2)[h] Note on M(H2 (5)meta.notecharl_F1.4GHzLimit flag on F1.4GHzmeta.code.errorcharF1.4GHz? 1.4GHz flux (8)mJyphot.flux.density;em.radio.750-1500MHzfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar