科学研究
-
2023.09.22
WALLABY detects two Polar Ring Galaxies
Polar ring galaxies (PRGs) exhibit an extendedring of material oriented perpendicular to the main disk, which provide crucialclues for galaxy evolutionand dynamics, such as galaxy interaction and gas accretion. In the WALLABY Pilot Data Release 1, we found two potential polar ring galaxies: NGC 4632 and NGC 6156. We used the iDaVIE virtual reality software todecompose gas within the disk and ri...
详情 -
2023.09.21
Thermal convection in rapidly rotating oblate spheroidal planets
Motivated by its applications to the interior dynamics of planets, the problem of thermal convection in rapidly rotating, self-gravitating fluid bodies has been widely modeled in spheres or spherical shells, which implicitly neglects the flattening effect due to the centrifugal force. However, recent Juno and Cassini missions have measured the gravitational fields of Jupiter and Saturn with ext...
详情 -
2023.09.19
Yan Liang and Ruizhe Feng
Speaker: Yan LiangTitle: Lensing, Dynamics & Mass Distribution of the Early-Type GalaxyAbstract:The mass structure, as one of the most important properties of early-type galaxy, is associated with the galactic formation and evolution. Nowadays, the gravitational lensing at the galaxy scale and dynamics information of the galaxy have been widely used to constrain the galaxy mass structure. In th...
详情 -
2023.09.15
AGN Feedback in Dwarfs and Giants Near and Far
AGN feedback is a critical component in modern simulations of galaxy evolution. In dwarf galaxies, both observational and theoretical evidence of AGN feedback are accumulating, shedding new light on the evolution of dwarf galaxies. In massive galaxies, luminous quasars likely drive the most energetic outflows, making them the best laboratories to examine quasar feedback closely across cosmic ti...
详情 -
2023.09.11
Stellar Object Formation and Evolution in AGN Disks
Study of stellar objects embedded in AGN accretion disks around massive Black Holes have been motivated by i) the disk of stars that formed in-situ in the galactic center; ii) the redshift independence of metallicity in AGN disks, which also suggest in-situ pollution; iii) massive LIGO-Virgo gravitational wave sources that possibly evolved in a gas rich environment, and iv) quasi-periodic erupt...
详情