What drives the [CII]/FIR deficit in submillimeter galaxies?. Issue Volume 15:Issue S352(2019) (June 2019)

• Record Type: Journal Article
• Authors: Rybak, Matus; Hodge, J. A.; Calistro Rivera, G.
• Editors: da Cunha, Elisabete; Hodge, Jacqueline; Afonso, José; Pentericci, Laura; Sobral, David
• Other Names: collab.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 15:Issue S352(2019)
• Page Start: 293
• Page End: 294
• Publication Date: 2019-06
• Subjects: galaxies: high-redshift, -- galaxies: ISM, -- submillimeter; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921319009104
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: Submillimeter galaxies at redshift z ⩾1 show a pronounced [CII]/FIR deficit down to sub-kpc scales; however, the physical origin of this deficit remains poorly understood. We use resolved ALMA observations of the [CII], FIR and CO(3–2) emission in two z = 3 SMGs to distinguish between the different proposed scenarios; the thermal saturation of the [CII] emission is the most likely explanation.