Host galaxy properties in astrophysics refer to the characteristics of the galaxy that contains a particular astronomical object or phenomenon, such as a quasar, supernova, or black hole. These properties can include the galaxy's size, shape, mass, luminosity, star formation rate, metallicity, and environment. Studying host galaxy properties can provide important insights into the formation and evolution of various astronomical objects, as well as the interactions between these objects and their surrounding galaxies. For example, researchers may investigate how the properties of a host galaxy influence the behavior and characteristics of the objects residing within it, or how interactions between galaxies can affect their evolution. Overall, studying host galaxy properties is crucial for understanding the wider context in which astronomical phenomena occur, and can shed light on the complex processes at play in the universe.