MATs (Monday Afternoon Talks)
3:00pm – Cheng-Lin Liao
Extending to the Brightest End: Physical Properties of the 870μm Brightest Dusty Star-forming Galaxies at z~3
Dusty star-forming galaxies (DSFGs), luminous in the infrared, are dust-rich galaxies with intense star formation (SFR~10-1000 Msun/yr) predominantly at cosmic noon (z~1-3). They are crucial for understanding galaxy formation and evolution, as they are closely linked to quasars and thought to be the progenitors of massive elliptical galaxies in the local Universe. Recent ALMA studies of a DSFG sample have revealed positive scaling relations on dust mass and SFR against the 870-micron. By adopting a sample of z~3 ALMA-selected DSFGs with CO/[CI] lines detected, we extend these relations to the brightest end at ~20 mJy, which is essential for understanding galaxy evolution at the brightest end. In combination with the UV-to-radio data, we explore the interstellar medium properties through multi-wavelength spectral energy distribution fitting. In this talk, I will focus on comparing the gas and dust properties of this brightest subset to the typical DSFGs whose 870μm flux are lower than ~10 mJy. Our results reveal that our brightest DSFGs are more gas and dust-rich but share similar dust properties with those DSFGs from local to high redshift.
Host: Josh Burrow