Disk-Planet Tug o War
Could the origin of eccentricities in giant planets come from the tug-of-war between the planets and their cradles of existence — protoplanetary disks?
Telltale Signs of Dwarf Galaxies
Dwarf galaxies are getting the limelight nowadays due to their high dark matter content. However, current search method only picks up bright dwarfs in certain region of the sky, potentially missing a large number of faint dwarfs in other parts of the sky. Maybe we should start searching in a different way?
The Labor of Outflows against Dark Matter Halo
Dark matter permeates the Universe and surrounds every galaxies in the form of dark matter halos. We don’t really know dark matter works, as predictions of standard cosmology, Lambda Cold Dark Matter (ΛCDM), are way off from observations. Is this the death of Cold Dark Matter, or there are something more to it?
Cosmic Reionization of Hydrogen and Helium
Cosmic reionization is a period in the Universe history when it switched from being predominantly neutral to mostly ionized. We still haven’t quite pinned down the source(s) that caused this transition, but we have our suspicions. It could be quasars. It could be galaxies. Or could it be something else?
[Figure from universe-review.ca/F05-galaxy06.htm]
Protogalaxy Collisions Birthing Supermassive Black Holes
How are supermassive black holes created in the first place? Oh, we need supermassive stars of course! But then, how do we form these supermassive stars…? The answer could be by ramming two protogalaxies against one another at high speeds.