J/ApJ/884/100ivo://CDS.VizieR/J/ApJ/884/100doi:10.26093/cds/vizier.18840100CDSHarada N.Sakamoto K.Martin S.Watanabe Y.Aladro R.Riquelme D.,Hirota A.2021-07-05T11:14:47Z2021-04-19T08:24:34ZCDS support team

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

cds-question@unistra.frmolecular-physicsinterstellar-mediumradio-astronomygalaxiesWe report an astrochemical study on the evolution of interstellar molecular clouds and consequent star formation in the center of the barred spiral galaxy M83. We used the Atacama Large Millimeter/submillimeter Array (ALMA) to image molecular species indicative of shocks (SiO and CH_3_OH), dense cores (N_2_H^+^), and photodissociation regions (CN and CCH), as well as a radio recombination line (H41{alpha}) tracing active star-forming regions. M83 has a circumnuclear gas ring that is joined at two intersections by gas streams from the leading- edge gas lanes on the bar. We found elevated abundances of the shock and dense-core tracers in one of the orbit-intersecting areas, and found peaks of CN and H41{alpha} downstream. In the other orbit-intersection area, we found a similar enhancement of the shock tracers, but less variation of other tracers, and no sign of active star formation in the stream. We propose that the observed chemical variation or lack of it is due to the presence or absence of collision-induced evolution of molecular clouds and induced star formation. This work presents the clearest case of the chemical evolution in the circumnuclear rings of barred galaxies thanks to the ALMA resolution and sensitivity.2019ApJ...884..100Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/884/100CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/361/1079 : HNCO in massive galactic dense cores (Zinchenko, 2000)J/AJ/122/3046 : HST photometry of star clusters in NGC 5236 (Harris+, 2001)J/A+A/455/971 : Organic molecules in the Gal. center (Requena-Torres+, 2006)J/ApJS/174/337 : Star formation in nuclear rings (Mazzuca+, 2008)J/ApJ/703/517 : The Spitzer Local Volume Legacy: IR photometry (Dale+, 2009)J/ApJ/699/1092 : Giant molecular clouds (SRBY) (Heyer+, 2009)J/MNRAS/421/2786 : Modelling of shock waves mol. line emission (Flower+ 2012)J/A+A/549/A39 : A 3mm molecular line survey of NGC1068 (Aladro+, 2013)J/A+A/563/L6 : CIG 638 CCH, HCN. HOC and HNC spectra (Martin+, 2014)J/A+A/579/A101 : 3mm molecular line survey of 8 AGN (Aladro+, 2015)J/ApJ/845/116 : 3mm survey toward W51 (Watanabe+, 2017)J/ApJ/855/49 : ALMA astrochemical obs. of NGC 3256 (Harada+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/884/100https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/884/100http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/884/100https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/884/100https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/884/100http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/884/100GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/884/100/table3 (Coordinates of analyzed positions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/884/100/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/884/100/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/884/100/table3?GETtext/xml+votable180.050000true204.25310417-29.862153330.0055555555555555566/43881https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/884/100?format=asciiRadiodefaultJ/ApJ/884/100/table3Coordinates of analyzed positionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPosPositionobs.fieldcharprimaryRA_ICRSHour of right ascension (ICRS)pos.eq.ra;meta.mainDE_ICRSDegree of declination (ICRS)pos.eq.dec;meta.mainDataDisplay the observed peak intensities and velocity-integrated intensities for the detected lines at thi position (link to Table 7)meta.ref.urlcharJ/ApJ/884/100/table7Observed peak intensities and velocity-integrated intensities for detected linesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTransTransitionmeta.id;phys.atmol.transitionPosPositionobs.fieldcharl_IpeakLimit flag on Ipeak (1)meta.code.errorcharIpeak[5.8/2200] Peak intensity (2)mKspect.line.intensityfloate_Ipeak[2/64]? Uncertainty for IpeakmKstat.errorfloatnullablel_IdVLimit flag on IdV (1)meta.code.errorcharIdV[0.2/120] Velocity-integrated Intensity (2)K.km/sphot.flux.densityfloate_IdV[0.06/4]? Uncertainty on IdVK.km/sstat.errorfloatnullableFlagError Flag (3)meta.code.errorchar