So what is it that makes mass segregation possible in clusters of galaxies - is it because they are more massive and slow?stefan r said:The Sun does not show mass segregation. All the elements remain present at the Sun's surface. At a galaxy scale molecules of gas are moving much to quickly. Convection dominates.
The gradient of heavier elements toward the galactic core and in the disc can be explained by an increased rate of star formation. It all started out as the same mix of gas but in denser regions the mass has been recycled through stars multiple times.
Black holes should be segregating toward the core of the galaxy. Large stars segregate into the center of clusters.
Ranku said:Can the flat rotation curve in an individual spiral galaxy, whereby heavier matter is concentrated at the center and hydrogen and dark matter is diffused, be also explained by dynamical friction?
Yes, you're right, and furthermore the observed distribution of heavier elements isn't enough to account for the peak in galactic rotation curves.Stefan r said:the gradient of heavier elements toward the galactic core and in the disk can be explained by an increased rate of star formation.
Dynamical friction is a phenomenon in which the motion of a massive object, such as a galaxy, is slowed down due to interactions with surrounding matter. This can occur through gravitational interactions with other galaxies, gas, and dark matter within the galaxy's own halo.
Dynamical friction plays a crucial role in the evolution of galaxies. It causes the orbits of galaxies to decay, leading to mergers and interactions between galaxies. This can affect the distribution of stars and gas within a galaxy, as well as trigger star formation and influence the growth of supermassive black holes at the center of galaxies.
The strength of dynamical friction depends on the mass and density of the galaxy, as well as the mass and density of the surrounding matter. The shape and orientation of the galaxy's orbit also play a role, as well as the properties of the surrounding environment, such as the presence of gas and dark matter.
Yes, dynamical friction can be observed in galaxies through various methods, such as studying the distribution and kinematics of stars and gas within a galaxy, as well as analyzing the dynamics of galaxy clusters. These observations can provide valuable insights into the evolution of galaxies and the role of dynamical friction in shaping their structures.
Dark matter, which is an invisible and elusive form of matter, is thought to make up the majority of the mass in galaxies. As such, it plays a significant role in dynamical friction by providing a gravitational pull on surrounding matter, including other galaxies. This can lead to stronger interactions and mergers between galaxies, ultimately shaping the evolution of the entire galaxy population.