By mass, the Galactic bulge is actually dominated by a relatively metal rich bar. This population exhibits relatively rapid rotation that reflects a pattern speed independent of Galactic latitude. We have completed a survey of 955 RR Lyrae stars in the bulge region, and find a remarkable population that does...
Young stars' infrared emission shows several puzzling features: variability uncorrelated with visible-light changes, foreground extinction that recurs erratically on weekly timescales, and excesses over the stellar photosphere too large to explain with starlight absorbed and re-emitted by a hydrostatic protostellar disk. I will discuss how each of these features can...
Galaxy collisions and merging is a ubiquitous process in the theory hierarchical galaxy formation。We investigate the effects of galaxy collisions and mergers on the formation and evolution of galaxies using N-body simulations. In this seminar we present two recent results. 1. In the case in which the two colliding systems...
The molecular composition in star-forming regions in the Milky Way is useful, for example, for determining the current stage of star-formation of a system. In starburst galaxies and active galactic nuclei (AGN), the molecular composition is thought to vary strongly. In the past few years, ALMA observations of multiple species...
By mass, the Galactic bulge is actually dominated by a relatively metal rich bar. This population exhibits relatively rapid rotation that reflects a pattern speed independent of Galactic latitude. We have completed a survey of 955 RR Lyrae stars in the bulge region, and find a remarkable population that does...
March 2016 10 : 30 galaxy formation and observations
Young stars' infrared emission shows several puzzling features: variability uncorrelated with visible-light changes, foreground extinction that recurs erratically on weekly timescales, and excesses over the stellar photosphere too large to explain with starlight absorbed and re-emitted by a hydrostatic protostellar disk. I will discuss how each of these features can...
October 2015 15 : 30 protoplanetary discs and MHD
Galaxy collisions and merging is a ubiquitous process in the theory hierarchical galaxy formation。We investigate the effects of galaxy collisions and mergers on the formation and evolution of galaxies using N-body simulations. In this seminar we present two recent results. 1. In the case in which the two colliding systems...
October 2015 13 : 30 DM Halo, N-body simulation, and structure formation
The molecular composition in star-forming regions in the Milky Way is useful, for example, for determining the current stage of star-formation of a system. In starburst galaxies and active galactic nuclei (AGN), the molecular composition is thought to vary strongly. In the past few years, ALMA observations of multiple species...
September 2015 13 : 00 ULIRG, IR, radiative transfer, and protostellar disc
和 英