FUNDAMENTAL PLANE Meaning and
Definition
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The fundamental plane is a concept used in cosmology and astrophysics to describe the relationship between key properties of elliptical galaxies. It is a mathematical plane that is derived from the combination of three fundamental parameters: the galaxy's luminosity, central velocity dispersion, and effective radius. These parameters are measured for a significant sample of elliptical galaxies and then plotted on a three-dimensional coordinate system.
The fundamental plane plays a crucial role in galactic studies and is often used as a tool to understand the formation and evolution of elliptical galaxies. It provides a correlations between the luminosity, size, and internal velocity dispersion of these galaxies, allowing researchers to make predictions about their characteristics based on these measured parameters. The fundamental plane is particularly useful in determining distances to galaxies and analyzing their dynamics.
The concept of the fundamental plane was first introduced by astrophysicists and astronomers in the late 1980s. It was initially considered an empirical relationship but later received theoretical explanations. The fundamental plane relates to the overall structure and nature of elliptical galaxies, shedding light on their physical properties and offering insights into the mechanisms involved in their formation and evolution.
Overall, the fundamental plane provides a valuable tool for understanding the properties and behavior of elliptical galaxies, offering a means to compare and classify them based on their fundamental parameters. Its usefulness in galactic studies has made it an essential concept in the field of astrophysics.
Etymology of FUNDAMENTAL PLANE
The word "fundamental" is derived from the Late Latin word "fundamentum", which means "foundation". It is a combination of the Latin root "fundare", meaning "to found", and the suffix "-mentum", indicating a result or state.
The term "plane" has its roots in the Latin word "planus", meaning "flat" or "level". It entered the English language through Old French "plane", which was derived from the Latin term.
Therefore, the etymology of the word "fundamental plane" indicates that it refers to a foundational or fundamental level or state that is flat or level.
