2020-10-29 Abstract
Title: Morphology and Kinematics of Double-barred Galaxies
Speaker: Yu-Ting Wu (NAOJ)
Date: October 29 at 12:20
Location: R521, General Building II
Abstract:
About one-third of barred-galaxies have smaller secondary bars embedded within outer primary bars, and therefore are called double-barred galaxies. The inner bar is expected to drive gas inflow to the nucleus of galaxies to feed supermassive black holes, which in turn affect the evolution of galaxies dramatically due to their feedback. The high occurrence of double-barred galaxies, together with the effects of the inner bar on the redistribution of angular momentum and matter, lead us to believe that double-barred galaxies play an important role in the evolution of the Universe. However, to investigate the inner bars, which have relatively smaller size and shorter dynamical time, the major challenge in simulation and observation is to achieve high resolutions in terms of space, velocity and time. In this talk, I will present what we know so far about double-barred galaxies and show the evolution of double-barred galaxies in our N-body simulations. In addition, I will present the morphology and kinematics of the double-barred galaxy NGC 3504, as seen by ALMA in CO (2-1) emission. Finally, I will describe our on-going pilot project to systematically study CO emission of double-barred galaxies.