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The Anatomy of an Extreme Starburst within 1.3 Gyr of the Big Bang Revealed by ALMA

Carilli, C. L. and Riechers, D. and Walter, F. and Maiolino, R. and Wagg, J. and Lentati, L. and McMahon, R. and Wolfe, A. (2013) The Anatomy of an Extreme Starburst within 1.3 Gyr of the Big Bang Revealed by ALMA. Astrophysical Journal, 763 (2). Art. No. 120. ISSN 0004-637X. doi:10.1088/0004-637X/763/2/120. https://resolver.caltech.edu/CaltechAUTHORS:20130222-140408170

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Abstract

We present further analysis of the [C II] 158 μm fine structure line and thermal dust continuum emission from the archetype extreme starburst/active galactic nucleus (AGN) group of galaxies in the early universe, BRI 1202–0725 at z = 4.7, using the Atacama Large Millimeter Array. The group has long been noted for having a closely separated (26 kpc in projection) FIR-hyperluminous quasar host galaxy and an optically obscured submillimeter galaxy (SMG). A short ALMA test observation reveals a rich laboratory for the study of the myriad processes involved in clustered massive galaxy formation in the early universe. Strong [C II] emission from the SMG and the quasar have been reported earlier by Wagg et al. based on these observations. In this paper, we examine in more detail the imaging results from the ALMA observations, including velocity channel images, position-velocity plots, and line moment images. We present detections of [C II] emission from two Lyα-selected galaxies in the group, demonstrating the relative ease with which ALMA can detect the [C II] emission from lower star formation rate galaxies at high redshift. Imaging of the [C II] emission shows a clear velocity gradient across the SMG, possibly indicating rotation or a more complex dynamical system on a scale ~10 kpc. There is evidence in the quasar spectrum and images for a possible outflow toward the southwest, as well as more extended emission (a "bridge"), between the quasar and the SMG, although the latter could simply be emission from Lyα-1 blending with that of the quasar at the limited spatial resolution of the current observations. These results provide an unprecedented view of a major merger of gas-rich galaxies driving extreme starbursts and AGN accretion during the formation of massive galaxies and supermassive black holes within 1.3 Gyr of the big bang.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/0004-637X/763/2/120DOIArticle
http://iopscience.iop.org/0004-637X/763/2/120PublisherArticle
ORCID:
AuthorORCID
Carilli, C. L.0000-0001-6647-3861
Riechers, D.0000-0001-9585-1462
Walter, F.0000-0003-4793-7880
Additional Information:© 2013 American Astronomical Society. Received 2012 July 9; accepted 2012 December 4; published 2013 January 16. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan), in cooperation with the Republic of Chile. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. C.L.C. thanks the Kavli Institute for Cosmology for their hospitality. We thank the referee for useful comments. This paper makes use of the following ALMA data: ADS/ JAO.ALMA#2011.0.00006.SV. ALMA is a partnership of ESO (representing its member states), NSF (USA), and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ.
Subject Keywords:galaxies: formation; galaxies: high-redshift; galaxies: starburst; radio lines: galaxies; submillimeter: galaxies
Issue or Number:2
DOI:10.1088/0004-637X/763/2/120
Record Number:CaltechAUTHORS:20130222-140408170
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130222-140408170
Official Citation:The Anatomy of an Extreme Starburst within 1.3 Gyr of the Big Bang Revealed by ALMA C. L. Carilli, D. Riechers, F. Walter, R. Maiolino, J. Wagg, L. Lentati, R. McMahon, and A. Wolfe doi:10.1088/0004-637X/763/2/120
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37086
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:22 Feb 2013 22:22
Last Modified:09 Nov 2021 23:26

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