What Does PDR Stand For?
PDR stands for Photon Dominated Region
PDR, or Photon Dominated Region, refers to a space environment in astrophysics where the dynamics and physical properties are significantly influenced by intense ultraviolet radiation from nearby stars. These regions are typically found at the borders of molecular clouds and are characterized by a balance between gas heating due to stellar radiation and cooling through various processes, such as line emission from molecules and dust. PDRs play a crucial role in star formation and the chemical evolution of galaxies by regulating the interaction between ionized and molecular gas.
Added on 14th April 2008 | Last edited on 16th June 2025 | Edit Acronym