Visit ASIAA Homepage Registration Deadline: November 27, 2019 (Taiwan Time)
East-Asian ALMA Science Workshop 2019
February 19(Wed)-21(Fri), 2020
ASIAA, Taipei, Taiwan

Oral Presentation

Extended Halpha over compact far-infrared continuum in dusty submillimeter galaxies - Insights into dust distributions and star-formation rates at z~2


Presenter: Chian-Chou (T.C.) Chen (ASIAA)

Star-formation rates (SFRs) are among the most fundamental measurements to galaxy formation models, yet there is still a
lack of agreement between measurements made using different methods, expecially when it comes to accounting for dust-obscured
SFRs from nebular emission lines at z-1-3, the epoch when over 8o% of the cosmic SFR density is obscured by dust. Part of the problem
is hinged on a lack of knowledge with regard to the spatial distributions of dust relative to star-forming regions traced by optical emission
lines, which requires both near-infrared IFU and sub-arcsecond far-infrared continuum observations that are only available recently. In
this talk I will present results from our ongoing program to study dusty star-forming galaxies at z-2 that are detected in Halpha by the IFU
from KMOS/SINFONI, as well as in far-infrared continuum by ALMA with a matched spatial resolution. I will present the relative spatial
distributions of these two tracers of SFRs and their sizes. I will discuss the impact of our findings on galaxy formation models in general,
as well as on the planning of future IFU observations by ALMA and the next generation large OIR telescopes.

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