ALMA Deep Field in the SSA22 proto-cluster at z = 3. Issue Volume 15:Issue S352(2019) (June 2019)

• Record Type: Journal Article
• Authors: Umehata, Hideki
• Editors: da Cunha, Elisabete; Hodge, Jacqueline; Afonso, José; Pentericci, Laura; Sobral, David
• Is Part Of: Proceedings of the International Astronomical Union. Volume 15:Issue S352(2019)
• Page Start: 157
• Page End: 161
• Publication Date: 2019-06
• Subjects: galaxies: evolution, -- galaxies: high-redshift; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921319009591
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: Galaxies and nuclei in dense environment at high redshift provide a good laboratory to investigate accelerated, most extreme evolution of galaxies. The SSA22 proto-cluster at z = 3.1 is known to have a three-dimensional 50 (comoving) Mpc-scale filamentary structure, traced by Lyα emitters, which makes the field a suitable target in this regard. To identify dust-obscured star-formation, a contiguous 20 arcmin 2 region at the node of the cosmic structure was observed in ALMA band 6. In total 57 ALMA sources have been identified above 5 σ, which makes the field one of the richest field in ALMA-identified (sub)millimeter galaxies. The follow-up spectroscopy confirmed about 20 sources as exact proto-cluster members so far. Together with high X-ray AGN fraction, our results suggest that the vigorous star formation activity and the growth of super massive black holes occurred simultaneously in the densest regions at z ∼ 3.