Universität zu Köln

Meyer, Romain A. ORCID: 0000-0001-5492-4522, Walter, Fabian, Cicone, Claudia ORCID: 0000-0003-0522-6941, Cox, Pierre, Decarli, Roberto, Neri, Roberto, Novak, Mladen, Pensabene, Antonio, Riechers, Dominik and Weiss, Axel (2022). Physical Constraints on the Extended Interstellar Medium of the z=6.42 Quasar J1148+5251: [C II](158 mu m), [N II](205 mu m), and [O I](146 mu m) Observations. Astrophys. J., 927 (2). BRISTOL: IOP Publishing Ltd. ISSN 1538-4357

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Abstract

We report new Northern Extended Millimeter Array observations of the [C II](158 mu m), [N II](205 mu m), and [O I](146 mu 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 mu m) and dust continuum emission have similar extensions (up to theta = 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 mu m)-emitting reservoir known at these epochs. Moreover, if the [C II](158 mu m), emission is examined only along its NE-SW axis, a significant excess (>5.8 sigma) of [C II](158 mu 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 mu m) line wings that were reported in previous studies. We also report the first detection of the [O I](146 mu m) and (tentatively) [N II](205 mu m) emission lines in J1148+5251. Using FSL ratios of the [C II](158 mu m), [N II](205 mu m), [O I](146 mu m), and previously measured [C II](369 mu 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 similar or equal to 10(3.5-4.5) cm(-3)), and an H I column density of 10(23) cm(-2) reproduce the observed FSL ratios well.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Meyer, Romain A. UNSPECIFIED orcid.org/0000-0001-5492-4522 UNSPECIFIED Walter, Fabian UNSPECIFIED UNSPECIFIED UNSPECIFIED Cicone, Claudia UNSPECIFIED orcid.org/0000-0003-0522-6941 UNSPECIFIED Cox, Pierre UNSPECIFIED UNSPECIFIED UNSPECIFIED Decarli, Roberto UNSPECIFIED UNSPECIFIED UNSPECIFIED Neri, Roberto UNSPECIFIED UNSPECIFIED UNSPECIFIED Novak, Mladen UNSPECIFIED UNSPECIFIED UNSPECIFIED Pensabene, Antonio UNSPECIFIED UNSPECIFIED UNSPECIFIED Riechers, Dominik UNSPECIFIED UNSPECIFIED UNSPECIFIED Weiss, Axel UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-689718
DOI:	10.3847/1538-4357/ac4e94
Journal or Publication Title:	Astrophys. J.
Volume:	927
Number:	2
Date:	2022
Publisher:	IOP Publishing Ltd
Place of Publication:	BRISTOL
ISSN:	1538-4357
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language C II EMISSION; STAR-FORMING GALAXY; FAR-INFRARED LINES; HIGH-Z EXPLORATION; HOST GALAXY; BLACK-HOLE; MOLECULAR GAS; DUST EMISSION; REDSHIFT; FEEDBACK Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/68971