Speaker
Description
We study how the void environment affects the formation and evolution of
galaxies in the universe by comparing the ratio of dark matter halo mass to
stellar mass of galaxies in voids with galaxies in denser regions. Using
spectroscopic observations from the SDSS MaNGA DR 15, we estimate the dark
matter halo mass of \Nvoid void galaxies and \Nwall galaxies in denser regions.
We use the velocity of the H$\alpha$ emission line to measure the rotation
curve of the galaxies, since the kinematics of the interstellar medium is
smoother than stellar kinematics. We observe a relationship between a
galaxy's absolute magnitude and its ratio of dark matter halo mass to stellar
mass, where fainter galaxies have a higher fraction of dark matter than
brighter galaxies. We find that for a given range in absolute magnitude, void
galaxies have similar ratios of dark matter halo mass to stellar mass to
galaxies in denser regions.
