J/A+A/618/A152ivo://CDS.VizieR/J/A+A/618/A152doi:10.26093/cds/vizier.36180152CDSKokotanekov G.Wise M.W.de Vries M.Intema H.T.2019-01-28T04:55:17Z2018-10-26T09:19:31ZCDS support team

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

cds-question@unistra.frgalaxy-clustersradio-sourcesx-ray-sourcesIn this paper we analyze AGN activity signatures in the rich nearby galaxy cluster Abell 1795 aiming to confirm and characterize the long-term feedback history in the system. We combine radio observations at 610 and 235MHz from the Giant Metrewave Radio Telescope (GMRT) with 3.4Msec X-ray data from the Chandra Observatory. Extracting radial temperature profiles, as well as Xray and radio surface brightness profiles in three directions showing major morphological disturbances, we highlight the signatures of activity in the system. For the first time we observe radio emission corresponding to the NW X-ray depression, which provides evidence in favor of the classification of the depression as a cavity. We identify two other X-ray cavities situated NW and SW of the AGN. While the central radio emission corresponding to the inner cavities shows a flatter spectral index, the radio extensions associated with the farthest X-ray cavities consist of aged plasma. All observed signatures both in radio and X-ray are consistent with several consecutive episodes of AGN activity, which gave rise to the observed morphology NW and SW from the core. In the southern region, we confirm the cooling wake hypothesis for the origin of the long tail. The deep X-ray data also allows us to distinguish significant distortions in the tail's inner parts, which we attribute to the activity of the AGN.2018A&A...618A.152Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/618/A152CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/618/A152https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/618/A152http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/618/A152https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/618/A152https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/618/A152http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/618/A152GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/618/A152/list (List of fits files)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/618/A152/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/618/A152/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/618/A152/list?GETtext/xml+votable180.050000true207.2186626.59250.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/618/A1526/10312https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/618/A152?format=asciiRadioX-raydefaultJ/A+A/618/A152/listList of fits filesrecnoRecord 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.numberintObs.dateObservation datestime.epoch;obsnullableObs.Freq? Observed frequencyMHzem.freqfloatnullablesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharAssocDataAssociated Data web pagemeta.ref.urlchar