Are all voids the same
Year: 2014
Type: preprint
Abstract: The influence of under-dense environments on the formation a nd evolution of galaxies is studied by analysing the photometric properties of∼ 1000 galaxies residing in voids, taken from our SDSS DR10 void catalog up to z∼ 0.055. We split void galaxies into two subsamples based on the luminosity density contrast of their host voids: ’sparse void’ �s = � −0.87. We find that galaxies in sparse voids are less massive than galaxies in populous voids. The luminosity distribution of galaxies in populous voids follows the same distribution observed across the SDSS survey in the same redshift range. Galaxies in the sparse voids are also bluer suggesting that they may be going through a relatively slow and continuous star formation. Additionally, we find that th e luminosity function of galaxies in populous voids is represented with the Schechter function whereas the same does not hold for sparse voids. Our analysis suggests that the properties of a host void plays a significant role in the formation and evolution of the void galaxies and determining the large scale evolution of voids is an important step to understand what processes regulate the evolution of galaxies.
Source: arXiv (Cornell University)
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W150855807