What Does BAL Stand For?

BAL stands for Broad Absorption Line

BAL, or Broad Absorption Line, refers to specific features observed in the spectra of certain astronomical objects, particularly quasars. These broad absorption lines are created by the absorption of light by gas clouds that are outflowing at high velocities, typically in the ultraviolet range. The presence of BALs is indicative of strong winds and outflows in the environments surrounding supermassive black holes, providing valuable insights into the dynamics and composition of interstellar matter as well as the processes influencing galaxy evolution.

Added on 14th April 2008 | Last edited on 16th June 2025 | Edit Acronym

Other Meanings for BAL