J/A+A/549/A27ivo://CDS.VizieR/J/A+A/549/A27doi:10.26093/cds/vizier.35490027CDSMelchior A.-L.Combes F.2018-05-28T08:54:08Z2012-12-11T07:12:24ZCDS support team

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

cds-question@unistra.frplanetary-nebulaeco-line-emissionradial-velocitygalaxiesspectroscopyWith IRAM-30m/HERA, we have detected CO(2-1) gas complexes within 30arcsec (100pc) from the center of M31 that amount to a minimum total mass of 4.2x10^4^M_{sun}_ (one third of the positions are detected). Averaging the whole HERA field, we show that there is no additional undetected diffuse component. Moreover, the gas detection is associated with gas lying on the far side of the M31 center as no extinction is observed in the optical, but some emission is present on infrared Spitzer maps. The kinematics is complex. (1) The velocity pattern is mainly redshifted: the dynamical center of the gas differs from the black hole position and the maximum of optical emission, and only the redshifted side is seen in our data. (2) Several velocity components are detected in some lines of sight. Our interpretation is supported by the reanalysis of the effect of dust on a complete planetary nebula sample. Two dust components are detected with respective position angles of 37deg and -66deg. This is compatible with a scenario where the superposition of the (PA=37deg) disk is dominated by the 10kpc ring and the inner 0.7kpc ring detected in infrared data, whose position angle (-66deg) we measured for the first time. The large-scale disk, which dominates the HI data, is steeply inclined (i=77deg), warped and superposed on the line of sight on the less inclined inner ring. The detected CO emission might come from both components.2013A&A...549A..27Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/549/A27CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/549/A27https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/549/A27http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/549/A27https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/549/A27https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/549/A27http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/549/A27GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/549/A27/m31-1aof (Offset of each spectrum)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/549/A27/m31-1aof?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/549/A27/m31-1aof?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/549/A27/m31-1aof?GETtext/xml+votable180.050000true10.672681941.25342720.0055555555555555566/2709https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/549/A27?format=asciiRadiodefaultJ/A+A/549/A27/m31-1aofOffset of each spectrumrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNspSpectrum numbermeta.idintoffXX offset (1)arcsecpos.eq.ra;arith.diffintoffYY offset (1)arcsecpos.eq.dec;arith.diffintFileNameName of spectrum file in subdirectory spmeta.id;meta.filecharspCO(2--1) spectrummeta.ref.urlchar_RAPosition (computed from offsets) (right ascension part)degpos.eq.ra;meta.main_DEPosition (computed from offsets) (declination part)degpos.eq.dec;meta.main