We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of the quadruply lensed z = 1.51 quasar HS 0810+2554 which provide useful insight on the kinematics and morphology of the CO molecular gas and the ∼2 mm-continuum emission in the quasar host galaxy. Lens modelling of the mm-continuum and the spectrally integrated CO(J = 3→2) images indicates that the source of the mm-continuum has an eccentricity of e ∼0.9 with a size of ∼1.6 kpc and the source of line emission has an eccentricity of e ∼0.7 with a size of ∼1 kpc. The spatially integrated emission of the CO(J = 2→1) and CO(J = 3→2) lines shows a triple peak structure with the outer peaks separated by Δv21 = 220 ± 19 km s-1 and Δv32 = 245 ± 28 km s-1, respectively, suggesting the presence of rotating molecular CO line emitting gas. Lensing inversion of the high spatial resolution images confirms the presence of rotation of the line emitting gas. Assuming a conversion factor of αCO = 0.8 M· (K km s-1 pc2)-1 we find the molecular gas mass of HS 0810+2554 to be MMol = (5.2 ± 1.5)/μ32 × 1010 M·, where μ32 is the magnification of the CO(J = 3→2) emission. We report the possible detection, at the 3.0-4.7σ confidence level, of shifted CO(J = 3→2) emission lines of high-velocity clumps of CO emission with velocities up to 1702 km s-1. We find that the momentum boost of the large-scale molecular wind is below the value predicted for an energy-conserving outflow given the momentum flux observed in the small-scale ultrafast outflow. © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.
Chartas, G., Davidson, E., Brusa, M., Vignali, C., Cappi, M., Dadina, M., et al. (2020). Linking the small-scale relativistic winds and the large-scale molecular outflows in the z = 1.51 lensed quasar HS 0810+2554. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 496(1), 598-611 [10.1093/mnras/staa1534].
Linking the small-scale relativistic winds and the large-scale molecular outflows in the z = 1.51 lensed quasar HS 0810+2554
Brusa, M.Funding Acquisition
;Vignali, C.Membro del Collaboration Group
;
2020
Abstract
We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of the quadruply lensed z = 1.51 quasar HS 0810+2554 which provide useful insight on the kinematics and morphology of the CO molecular gas and the ∼2 mm-continuum emission in the quasar host galaxy. Lens modelling of the mm-continuum and the spectrally integrated CO(J = 3→2) images indicates that the source of the mm-continuum has an eccentricity of e ∼0.9 with a size of ∼1.6 kpc and the source of line emission has an eccentricity of e ∼0.7 with a size of ∼1 kpc. The spatially integrated emission of the CO(J = 2→1) and CO(J = 3→2) lines shows a triple peak structure with the outer peaks separated by Δv21 = 220 ± 19 km s-1 and Δv32 = 245 ± 28 km s-1, respectively, suggesting the presence of rotating molecular CO line emitting gas. Lensing inversion of the high spatial resolution images confirms the presence of rotation of the line emitting gas. Assuming a conversion factor of αCO = 0.8 M· (K km s-1 pc2)-1 we find the molecular gas mass of HS 0810+2554 to be MMol = (5.2 ± 1.5)/μ32 × 1010 M·, where μ32 is the magnification of the CO(J = 3→2) emission. We report the possible detection, at the 3.0-4.7σ confidence level, of shifted CO(J = 3→2) emission lines of high-velocity clumps of CO emission with velocities up to 1702 km s-1. We find that the momentum boost of the large-scale molecular wind is below the value predicted for an energy-conserving outflow given the momentum flux observed in the small-scale ultrafast outflow. © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.File | Dimensione | Formato | |
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