J/A+A/608/A30ivo://CDS.VizieR/J/A+A/608/A30doi:10.26093/cds/vizier.36080030CDSFeruglio C.Ferrara A.Bischetti M.Downes D.Neri R.Ceccarelli C.,Cicone C.Fiore F.Gallerani S.Maiolino R.Menci N.Piconcelli E.,Vietri G.Vignali C.Zappacosta L.2017-12-07T07:12:10Z2017-12-01T12:10:54ZCDS support team

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

cds-question@unistra.frquasarsradio-spectroscopyco-line-emissionWe have performed a high sensitivity observation of the UFO/BAL quasar APM 08279+5255 at z=3.912 with NOEMA at 3.2mm, aimed at detecting fast moving molecular gas. We report the detection of blueshifted CO(4-3) with maximum velocity (v95%) of -1340km/s, with respect to the systemic peak emission, and a luminosity of L'=9.9x10^9^{mu}^-1^K.km/s/pc^2^, where {mu} is the lensing magnification factor. We discuss various scenarios for the nature of this emission and conclude that this is the first detection of fast molecular gas at redshift >3. We derived a mass flow rate of molecular gas in the range dM/dt=3-7.4x10^3^M_{sun}_/yr and momentum boost (dP_OF_/dt)/(dP_AGN_/dt)~2-6, which is therefore consistent with a momentum conserving flow. For the largest dP_OF_ the scaling is also consistent with an energy conserving flow with an efficiency of ~10-20%. The present data can hardly discriminate between the two expansion modes. The mass loading factor of the molecular outflow {eta}=(dM_OF_/dt)/SFR is >>1. We also detected a molecular emission line at a frequency of 94.83GHz corresponding to a rest-frame frequency of 465.8GHz; we tentatively identified this frequency with the cation molecule N_2_H^+^(5-4), which would be the first detection of this species at high redshift. We discuss the alternative possibility that this emission is due to a CO emission line from the, so far undetected, lens galaxy. Further observations of additional transitions of the same species with NOEMA can discriminate between the two scenarios.2017A&A...608A..30Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/608/A30CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/608/A30https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/608/A30http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/608/A30https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/608/A30https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/608/A30http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/608/A30GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapRadiodefaultJ/A+A/608/A30/apm-co431D spectrum of the CO(4-3) spectral regionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVeloVelocity with respect to the observed frame freq of CO(4-3) peakkm/sphys.velocdoubleFluxFlux densitymJyphot.fluxfloate_FluxError on flux densitymJystat.error;phot.fluxfloat