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• W4221052006 endingPage "152" @default.
• W4221052006 startingPage "152" @default.
• W4221052006 abstract "We report new Northern Extended Millimeter Array (NOEMA) observations of the [CII], [NII] and [OI] atomic fine structure lines and dust continuum emission of J1148+5251, a z=6.42 quasar, that probe the physical properties of its interstellar medium (ISM). The radially-averaged [CII] and dust continuum emission have similar extensions (up to $theta = 2.51^{+0.46}_{-0.25} rm{arcsec}$, corresponding to $r= 9.8^{+3.3}_{-2.1} rm{kpc}$ accounting for beam-convolution), confirming that J1148+5251 is the quasar with the largest [CII]-emitting has reservoir known at these epochs.Moreover, if the [CII] emission is examined only along its NE-SW axis, a significant excess ($>5.8sigma$) of [CII] emission (with respect to the dust) is detected. The new wide--bandwidth observations enable us to accurately constrain the continuum emission, and do not statistically require the presence of broad [CII] line wings that were reported in previous studies. We also report the first detection of the [OI] and (tentatively) [NII] emission lines in J1148+5251. Using Fine Structure Lines (FSL) ratios of the [CII], [NII], [OI] and previously measured [CI] emission lines, we show that J1148+5251 has similar ISM conditions compared to lower--redshift (ultra)-luminous infrared galaxies. CLOUDY modelling of the FSL ratios exclude X--ray dominated regions (XDR) and favours photodissociation regions (PDR) as the origin of the FSL emission. We find that a high radiation field ($10^{3.5-4.5},G_0$), high gas density ($n simeq 10^{3.5-4.5}, rm{cm}^{-3}$) and HI column density of $10^{23} ,rm{cm^{-2}}$ reproduce the observed FSL ratios well." @default.
• W4221052006 created "2022-04-03" @default.
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• W4221052006 date "2022-03-01" @default.
• W4221052006 modified "2023-10-01" @default.
• W4221052006 title "Physical Constraints on the Extended Interstellar Medium of the z = 6.42 Quasar J1148+5251: [C ii]_{158 μm}, [N ii]_{205 μm}, and [O i]_{146 μm} Observations" @default.
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