Rotation curves and mass distribution of nearby spiral and dwarf galaxies.

Rotation curve of nearby disk galaxies stays flat up to large radius which is a key evidence for the existence of dark matter. The rotational velocities trace the gravitational potential, hence their mass distribution and often used to distinguish between the empirical and theoretical dark matter halo profiles. Therefore, rotation curves that represent the gravitational potential are necessary.The DM halo distribution is mainly obtained by comparing the observed rotation curve with the contributions from the stars, gas and dark matter halo.In this talk, I will discuss the role of systematic errors in the observed rotation curves and how they could affect the inferred dark matter halo distribution.

Discussion Leader: 
Toky
Place: 
KIAA-PKU
Time: 
Tuesday, January 8, 2019 - 12:00pm to 1:00pm