J/A+A/625/A102ivo://CDS.VizieR/J/A+A/625/A102doi:10.26093/cds/vizier.36250102CDSKolwa S.Vernet J.De Breuck C.Villar-Martin M.Humphrey A.,Arrigoni-Battaia F.Gullberg B.Falkendal T.Drouart G.Lehnert M.,Wylezalek D.Man A.2019-05-27T11:00:57Z2019-05-23T14:14:06ZCDS support team

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

cds-question@unistra.frradio-galaxiesWe have used the Multi-Unit Spectroscopic Explorer (MUSE) to study the circumgalactic medium (CGM) of a z=2.92 radio galaxy, MRC 0943-242 by parametrising its emitting and absorbing gas. In both Ly{alpha} {lambda}1216 and HeII {lambda}1640 lines, we observe emission with velocity shifts of {Delta}v=~-1000km/s from the systemic redshift of the galaxy. These blueshifted components represent kinematically perturbed gas that is aligned with the radio axis, which we interpret as jet-driven outflows. Three of the four known Ly absorbers are detected at the same velocity as CIV {lambda}{lambda}1548,1551 and NV {lambda}{lambda}1239,1243 absorbers, proving that the gas is metal-enriched more so than previously thought. At the velocity of a strong Ly{alpha} absorber with an HI column of N_HI_/cm^-2^=10^19.2^ and velocity shift of Delta}v=~-400km/s, we also detect SiII {lambda}1260 and SiII {lambda}1527 absorption, which suggests that the absorbing gas is ionisation bounded. With the added sensitivity of this MUSE observation, we are more capable of adding constraints to absorber column densities and consequently determining what powers their ionisation. To do this, we obtain photoionisation grid models in cloudy which show that AGN radiation is capable of ionising the gas and producing the observed column densities in a gas of metallicity of Z/Z_{sun}_~=0.01 with a nitrogen abundance a factor of 10 greater than that of hydrogen. This metal-enriched absorbing gas, which is also spatially extended over a projected distance of r>~60kpc, is likely to have undergone chemical enrichment through stellar winds that have swept up metals from the interstellar-medium and deposited them in the outer regions of the galaxy's halo.2019A&A...625A.102Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/625/A102CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/625/A102https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/625/A102http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/625/A102https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/625/A102https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/625/A102http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/625/A102GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/625/A102/list (Information on fits datacube)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/625/A102/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/625/A102/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/625/A102/list?GETtext/xml+votable180.050000true146.38405-24.48210.0055555555555555566/40240https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/625/A102?format=asciiRadiodefaultJ/A+A/625/A102/listInformation on fits datacuberecnoRecord 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.mainscaleScale of the imagearcsec/pixinstr.scalefloatNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintNzNumber of pixels along Z-axismeta.numberintObs.dateObservation datestime.epoch;obsnullableblambdaLower value of wavelength interval0.1nmem.wlfloatBlambdaUpper value of wavelength interval0.1nmem.wlfloatdlambdaWavelength resolution0.1nmspect.resolutionfloatsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar