Universität zu Köln

Marrone, D. P., Spilker, J. S., Hayward, C. C., Vieira, J. D., Aravena, M., Ashby, M. L. N., Bayliss, M. B., Bethermin, M., Brodwin, M., Bothwell, M. S., Carlstrom, J. E., Chapman, S. C., Chen, Chian-Chou ORCID: 0000-0002-3805-0789, Crawford, T. M., Cunningham, D. J. M., De Breuck, C., Fassnacht, C. D., Gonzalez, A. H., Greve, T. R., Hezaveh, Y. D., Lacaille, K., Litke, K. C., Lower, S., Ma, J., Malkan, M., Miller, T. B., Morningstar, W. R., Murphy, E. J., Narayanan, D., Phadke, K. A., Rotermund, K. M., Sreevani, J., Stalder, B., Stark, A. A., Strandet, M. L., Tang, M. and Weiss, A. (2018). Galaxy growth in a massive halo in the first billion years of cosmic history. Nature, 553 (7686). S. 51 - 69. LONDON: NATURE PUBLISHING GROUP. ISSN 1476-4687

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Abstract

According to the current understanding of cosmic structure formation, the precursors of the most massive structures in the Universe began to form shortly after the Big Bang, in regions corresponding to the largest fluctuations in the cosmic density field(1-3). Observing these structures during their period of active growth and assembly-the first few hundred million years of the Universe-is challenging because it requires surveys that are sensitive enough to detect the distant galaxies that act as signposts for these structures and wide enough to capture the rarest objects. As a result, very few such objects have been detected so far(4,5). Here we report observations of a far-infrared-luminous object at redshift 6.900 (less than 800 million years after the Big Bang) that was discovered in a wide-field survey(6). High-resolution imaging shows it to be a pair of extremely massive star-forming galaxies. The larger is forming stars at a rate of 2,900 solar masses per year, contains 270 billion solar masses of gas and 2.5 billion solar masses of dust, and is more massive than any other known object at a redshift of more than 6. Its rapid star formation is probably triggered by its companion galaxy at a projected separation of 8 kiloparsecs. This merging companion hosts 35 billion solar masses of stars and has a star-formation rate of 540 solar masses per year, but has an order of magnitude less gas and dust than its neighbour and physical conditions akin to those observed in lower-metallicity galaxies in the nearby Universe(7). These objects suggest the presence of a dark-matter halo with a mass of more than 100 billion solar masses, making it among the rarest dark-matter haloes that should exist in the Universe at this epoch.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Marrone, D. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Spilker, J. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hayward, C. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vieira, J. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Aravena, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ashby, M. L. N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bayliss, M. B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bethermin, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Brodwin, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bothwell, M. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Carlstrom, J. E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chapman, S. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chen, Chian-Chou UNSPECIFIED orcid.org/0000-0002-3805-0789 UNSPECIFIED Crawford, T. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cunningham, D. J. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED De Breuck, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fassnacht, C. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gonzalez, A. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Greve, T. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hezaveh, Y. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lacaille, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Litke, K. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lower, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ma, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Malkan, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Miller, T. B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Morningstar, W. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Murphy, E. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Narayanan, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Phadke, K. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rotermund, K. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sreevani, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stalder, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stark, A. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Strandet, M. L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tang, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Weiss, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-199128
DOI:	10.1038/nature24629
Journal or Publication Title:	Nature
Volume:	553
Number:	7686
Page Range:	S. 51 - 69
Date:	2018
Publisher:	NATURE PUBLISHING GROUP
Place of Publication:	LONDON
ISSN:	1476-4687
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language STAR-FORMING GALAXIES; STELLAR POPULATION SYNTHESIS; SIMILAR-TO 6; MOLECULAR GAS; ALMA OBSERVATIONS; C II; REDSHIFT DISTRIBUTION; STARBURST GALAXY; HOST GALAXIES; DUSTY Multiple languages Multidisciplinary Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/19912