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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/31262
Title: No Evidence for [C II] Halos or High-velocity Outflows in z ≳ 6 Quasar Host Galaxies
Authors: Novak, Mladen
Venemans, Bram P.
Walter, Fabian
Neeleman, Marcel
Kaasinen, Melanie
Liang, Lichen
Feldmann, Robert
Bañados, Eduardo
Carilli, Chris
DECARLI, ROBERTO 
Drake, Alyssa B.
Fan, Xiaohui
Farina, Emanuele P.
Mazzucchelli, Chiara
Rix, Hans-Walter
Wang, Ran
Issue Date: 2020
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 904
Issue: 2
First Page: 131
Abstract: We study the interstellar medium in a sample of 27 high-redshift quasar host galaxies at z ≳ 6, using the [C II] 158 μm emission line and the underlying dust continuum observed at ∼1 kpc resolution with Atacama Large Millimeter Array. By performing uv-plane spectral stacking of both the high and low spatial resolution data, we investigate the spatial and velocity extent of gas and the size of the dust-emitting regions. We find that the average surface brightness profile of both the [C II] and the dust continuum emission can be described by a steep component within a radius of 2 kpc and a shallower component with a scale length of 2 kpc, detected up to ∼10 kpc. The surface brightness of the extended emission drops below ∼1% of the peak at radius of ∼5 kpc, beyond which it constitutes 10%–20% of the total measured flux density. Although the central component of the dust continuum emission is more compact than that of the [C II] emission, the extended components have equivalent profiles. The observed extended components are consistent with those predicted by hydrodynamical simulations of galaxies with similar infrared luminosities, where the dust emission is powered by star formation. The [C II] Gaussian, with no observable [C II], which would be indicative of outflows. Our findings suggest that we are probing the interstellar medium and associated star formation in the quasar host galaxies up to radii of 10 kpc, whereas we find no evidence for halos or outflows.
URI: http://hdl.handle.net/20.500.12386/31262
URL: https://iopscience.iop.org/article/10.3847/1538-4357/abc33f
https://api.elsevier.com/content/abstract/scopus_id/85097509716
ISSN: 0004-637X
DOI: 10.3847/1538-4357/abc33f
Bibcode ADS: 2020ApJ...904..131N
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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Novak_2020_ApJ_904_131.pdf[Administrators only]8.21 MBAdobe PDF
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