Abstract：
:Lyman-alpha emitters are thought to be young, low-mass galaxies with ages of approximately 10(8) yr (refs 1, 2). An overdensity of them in one region of the sky (the SSA 22 field) traces out a filamentary structure in the early Universe at a redshift of z approximately 3.1 (equivalent to 15 per cent of the age of the Universe) and is believed to mark a forming protocluster. Galaxies that are bright at (sub)millimetre wavelengths are undergoing violent episodes of star formation, and there is evidence that they are preferentially associated with high-redshift radio galaxies, so the question of whether they are also associated with the most significant large-scale structure growing at high redshift (as outlined by Lyman-alpha emitters) naturally arises. Here we report an imaging survey of 1,100-microm emission in the SSA 22 region. We find an enhancement of submillimetre galaxies near the core of the protocluster, and a large-scale correlation between the submillimetre galaxies and the low-mass Lyman-alpha emitters, suggesting synchronous formation of the two very different types of star-forming galaxy within the same structure at high redshift. These results are in general agreement with our understanding of the formation of cosmic structure.
journal_name
Naturejournal_title
Natureauthors
Tamura Y,Kohno K,Nakanishi K,Hatsukade B,Iono D,Wilson GW,Yun MS,Takata T,Matsuda Y,Tosaki T,Ezawa H,Perera TA,Scott KS,Austermann JE,Hughes DH,Aretxaga I,Chung A,Oshima T,Yamaguchi N,Tanaka K,Kawabe Rdoi
10.1038/nature07947subject
Has Abstractpub_date
2009-05-07 00:00:00pages
61-3issue
7243eissn
0028-0836issn
1476-4687pii
nature07947journal_volume
459pub_type
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