Further and Brighter - A new ALMA spectroscopic survey of monstrous dusty star-forming galaxies at high redshifts

Chian-Chou Chen (TC)^1*, Cheng-Lin Liao²

¹Institute of Astronomy and Astrophysics, Academia Sinica, Taipei, Taiwan
²Graduate Institute of Astrophysics, National Taiwan University, Taipei, Taiwan

* Presenter:Chian-Chou Chen (TC), email:ccchen@asiaa.sinica.edu.tw

Galaxies that are bright in far-infrared and submillimeter host sites of both vigorous star formation and active black hole growth, which are both key processes in formation of massive galaxies but often missed by traditional optical studies due to heavy dust attenuation. Technical difficulties compounded with their extreme infrared luminosity have kept many issues unsettled regarding the basic physical properties of these submillimeter galaxies (SMGs), predominately located at high redshifts (z>1). One outstanding example is the redshift distribution of the brightest, where the models differ the most in their predictions. In this talk I plan to introduce our new ALMA spectroscopic survey to tackle this issue by measuring redshifts of a complete and well-defined sample of bright SMGs. I will show that our bright SMG sample is further in distance and intrinsically brighter than what some models have predicted. Our results favor the empirical model that interpret SMGs as proto-spheroidal galaxies, which are expected to eventually evolve into massive ellipticals seen in the nearby Universe.

Keywords: Galaxy formation and evolution, Dusty star-forming galaxies, Massive galaxies, Redshift survey, ALMA