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J/A+A/608/A30       APM 08279+5255  CO(4-3) spectrum         (Feruglio+, 2017)

On the discovery of fast molecular gas in the UFO/BAL quasar APM 08279+5255 at z=3.912. Feruglio 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. <Astron. Astrophys. 608, A30 (2017)> =2017A&A...608A..30F (SIMBAD/NED BibCode)
ADC_Keywords: QSOs ; Spectra, millimetric/submm ; Carbon monoxide Keywords: galaxies: active - quasars: emission lines / submillimeter: ISM - X-rays: individuals: APM 08279+5255 - quasars: individual: APM 08279+5255 - quasars: general Abstract: We 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'=9.9x109µ-1K.km/s/pc2, where µ 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=3-7.4x103M/yr and momentum boost (dPOF/dt)/(dPAGN/dt)∼2-6, which is therefore consistent with a momentum conserving flow. For the largest dPOF 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 η=(dMOF/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 N2H+(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. Description: NOEMA observations of the CO(4-3) spectral region. Objects: ------------------------------------------------------- RA (2000) DE Designation(s) ------------------------------------------------------- 08 31 41.70 +52 45 17.5 APM 08279 = QSO J0831+5245 ------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file apm-co43.dat 30 90 1D spectrum of the CO(4-3) spectral region
Byte-by-byte Description of file: apm-co43.dat
Bytes Format Units Label Explanations
1- 10 F10.3 km/s Velo Velocity with respect to the observed frame freq of CO(4-3) peak 15- 20 F6.3 mJy Flux Flux density 26- 30 F5.3 mJy e_Flux Error on flux density
Acknowledgements: Chiara Feruglio, feruglio(at)oats.inaf.it
(End) Chiara Feruglio [INAF OATs, Italy], Patricia Vannier [CDS] 22-Sep-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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