J/A+A/590/A25ivo://CDS.VizieR/J/A+A/590/A25doi:10.26093/cds/vizier.35900025CDSMartin S.Aalto S.Sakamoto K.Gonzalez-Alfonso E.Muller S.,Henkel C.Garcia-Burillo S.Aladro R.Costagliola F.Harada N.,Krips M.Martin-Pintado J.Muhle S.van der Werf P.Viti S.2016-05-02T13:21:33Z2016-05-02T14:20:44ZCDS support team

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

cds-question@unistra.frgalaxiesmillimeter-astronomysubmillimeter-astronomyThe origin of the enormous luminosities of the two opaque nuclei of Arp 220, the prototypical ultra-luminous infrared galaxy, remains a mystery because we lack observational tools to explore the innermost regions around the nuclei. We explore the potential of imaging vibrationally excited molecular emission at high angular resolution to better understand the morphology and physical structure of the dense gas in Arp 220 and to gain insight into the nature of the nuclear powering sources. The Atacama Large Millimeter/submillimeter Array (ALMA) provided simultaneous observations of HCN, HCO^+^, and vibrationally excited HCN v_2_=1f emission. Their J=4-3 and 3-2 transitions were observed at a matching resolution of ~0.5", which allows us to isolate the emission from the two nuclei.2016A&A...590A..25Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/590/A25CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/493/481 : Maps of Arp 220 (Aalto+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/590/A25https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/590/A25http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/590/A25https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/590/A25https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/590/A25http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/590/A25GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/590/A25/list (List of fits datacubes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/590/A25/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/590/A25/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/590/A25/list?GETtext/xml+votable180.050000true233.7384223.503190.0055555555555555566/8673https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/590/A25?format=asciiRadiodefaultJ/A+A/590/A25/listList of fits datacubesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintNzNumber of slicesmeta.numberintObs.DateObservation datetime.epoch;obscharbFreqLower value of frequency intervalHzem.freq;stat.mindoubleBFreqUpper value of frequency intervalHzem.freq;stat.maxdoubledFreqFrequency resolutionHzspect.resolutiondoublesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar