J/MNRAS/446/3478ivo://CDS.VizieR/J/MNRAS/446/3478doi:10.26093/cds/vizier.74463478CDSMcKinley B.Yang R.Lopez-Caniego M.Briggs F.Hurley-Walker N.,Wayth R.B.Offringa A.R.Crocker R.Bernardi G.Procopio P.,Gaensler B.M.Tingay S.J.Johnston-Hollitt M.Mcdonald M.Bell M.,Bhat N.D.R.Bowman J.D.Cappallo R.J.Corey B.E.Deshpande A.A.,Emrich D.Ewall-wice A.Feng L.Goeke R.Greenhill L.J.Hazelton B.J.,Hewitt J.N.Hindson L.Jacobs D.Kaplan D.L.Kasper J.C.,Kratzenberg E.Kudryavtseva N.Lenc E.Lonsdale C.J.Lynch M.J.,Mcwhirter S.R.Mitchell D.A.Morales M.F.Morgan E.Oberoi D.,Ord S.M.Pindor B.Prabu T.Riding J.Rogers A.E.E.Roshi D.A.,Udaya Shankar N.Srivani K.S.Subrahmanyan R.Waterson M.Webster R.L.,Whitney A.R.Williams A.Williams C.L.2024-08-14T20:19:06Z2022-02-07T15:40:25ZCDS support team

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

cds-question@unistra.frradio-galaxiesWe present new low-frequency observations of the nearby radio galaxy Fornax A at 154MHz with the Murchison Widefield Array, microwave flux-density measurements obtained from WMAP and Planck data, and {gamma}-ray flux densities obtained from Fermi data. We also compile a comprehensive list of previously published images and flux-density measurements at radio, microwave and X-ray energies. A detailed analysis of the spectrum of Fornax A between 154 and 1510MHz reveals that both radio lobes have a similar spatially averaged spectral index, and that there exists a steep-spectrum bridge of diffuse emission between the lobes. Taking the spectral index of both lobes to be the same, we model the spectral energy distribution of Fornax A across an energy range spanning 18 orders of magnitude, to investigate the origin of the X-ray and {gamma}-ray emission. A standard leptonic model for the production of both the X-rays and {gamma}-rays by inverse-Compton scattering does not fit the multiwavelength observations. Our results best support a scenario where the X-rays are produced by inverse-Compton scattering and the {gamma}-rays are produced primarily by hadronic processes confined to the filamentary structures of the Fornax A lobes.2015MNRAS.446.3478Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/446/3478CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/446/3478https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/446/3478http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/446/3478https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/446/3478https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/446/3478http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/446/3478GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/446/3478/list (Information on fits image)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/446/3478/list?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/446/3478/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/446/3478/list?GETtext/xml+votable180.050000true52.996-39.0040.0055555555555555566/34485https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/446/3478?format=asciiRadiodefaultJ/MNRAS/446/3478/listInformation on fits imagerecnoRecord 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;obsnullableFreqObserved frequencyMHzem.freqfloatsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar