ALMA witnesses the assembly of first galaxies. Issue Volume 15:Issue S352(2019) (June 2019)

• Record Type: Journal Article
• Authors: Carniani, Stefano
• 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: 27
• Page End: 32
• Publication Date: 2019-06
• Subjects: galaxies: high-redshift, -- galaxies: ISM, -- infrared: ISM; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921319009098
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: Characterising primeval galaxies entails the challenging goal of observing galaxies with modest star formation rates (S FR < 100 M ȯ yr −1 ) and approaching the beginning of the reionisation epoch ( z > 6). To date a large number of primeval galaxies have been identified thanks to deep near-infrared surveys. However, to further our understanding on the formation and evolution of such primeval objects, we must investigate their nature and physical properties through multi-band spectroscopic observations. Information on dust content, metallicity, interactions with the surrounding environment, and outflows can be obtained with ALMA observations of far-infrared (FIR) lines such as the [Cii ] at 158 μ m and [Oiii ] at 88 μ m. Here, we, thus, discuss the recent results unveiled by ALMA observations and present new [Cii ] observations of BDF-3299, a star-forming galaxy at z = 7.1 showing a spatial and spectral offset between the rest-frame UV and the FIR lines emission.