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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

Meyer, Romain A. ; Walter, Fabian ; Cicone, Claudia ; Cox, Pierre ; Decarli, Roberto ; Neri, Roberto ; Novak, Mladen ; Pensabene, Antonio ; Riechers, Dominik ; Weiss, Axel

The Astrophysical journal, 2022-03, Vol.927 (2), p.152 [Periódico revisado por pares]

Philadelphia: The American Astronomical Society

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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
Autor: Meyer, Romain A. ; Walter, Fabian ; Cicone, Claudia ; Cox, Pierre ; Decarli, Roberto ; Neri, Roberto ; Novak, Mladen ; Pensabene, Antonio ; Riechers, Dominik ; Weiss, Axel
Assuntos: Astronomical models ; Astrophysics ; Atomic structure ; Continuum radiation ; Dust ; Emission lines ; Emission measurements ; Fine structure ; Galaxies ; Gas density ; High-redshift galaxies ; Infrared astronomy ; Interferometry ; Interstellar matter ; Interstellar medium ; Millimeter astronomy ; Photodissociation ; Photodissociation of water ; Physical properties ; Physics ; Quasars ; Radiation ; Red shift ; Sciences of the Universe
É parte de: The Astrophysical journal, 2022-03, Vol.927 (2), p.152
Notas: AAS33283
Galaxies and Cosmology
Descrição: Abstract We report new Northern Extended Millimeter Array observations of the [C ii ] 158 μ m , [N ii ] 205 μ m , and [O i ] 146 μ m atomic fine structure lines (FSLs) and dust continuum emission of J1148+5251, a z = 6.42 quasar, which probe the physical properties of its interstellar medium (ISM). The radially averaged [C ii ] 158 μ m and dust continuum emission have similar extensions (up to θ = 2.51 − 0.25 + 0.46 arcsec , corresponding to r = 9.8 − 2.1 + 3.3 kpc , accounting for beam convolution), confirming that J1148+5251 is the quasar with the largest [C ii ] 158 μ m -emitting reservoir known at these epochs. Moreover, if the [C ii ] 158 μ m emission is examined only along its NE–SW axis, a significant excess (>5.8 σ ) of [C ii ] 158 μ m 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 [C ii ] 158 μ m line wings that were reported in previous studies. We also report the first detection of the [O i ] 146 μ m and (tentatively) [N ii ] 205 μ m emission lines in J1148+5251. Using FSL ratios of the [C ii ] 158 μ m , [N ii ] 205 μ m , [O i ] 146 μ m , and previously measured [C i ] 369 μ m emission lines, we show that J1148+5251 has similar ISM conditions compared to lower-redshift (ultra)luminous infrared galaxies. CLOUDY modeling of the FSL ratios excludes X-ray-dominated regions and favors photodissociation regions as the origin of the FSL emission. We find that a high radiation field (10 3.5–4.5 G 0 ), a high gas density ( n ≃ 10 3.5–4.5 cm −3 ), and an H i column density of 10 23 cm −2 reproduce the observed FSL ratios well.
Editor: Philadelphia: The American Astronomical Society
Idioma: Inglês

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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

Meyer, Romain A. ; Walter, Fabian ; Cicone, Claudia ; Cox, Pierre ; Decarli, Roberto ; Neri, Roberto ; Novak, Mladen ; Pensabene, Antonio ; Riechers, Dominik ; Weiss, Axel

Philadelphia: The American Astronomical Society

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