What does "LTGs" mean?
Table of Contents
Late-type galaxies (LTGs) are a category of galaxies that typically have a spiral shape. They are known for their bright, blue colors and active star formation. LTGs are often more loosely packed with stars compared to early-type galaxies, which tend to be more rounded and older.
Characteristics
LTGs usually have larger sizes than some other types of dwarf galaxies. They display positive color gradients, which means their centers are often bluer than their outer regions. This indicates that younger, hotter stars are more common at the center.
Morphological Classes
In a mix of galaxy types, LTGs make up a significant portion. They are often compared to early-type galaxies, which are more compact and have different star formation patterns. While both types can show signs of interactions with other galaxies, LTGs tend to have active star formation across their structure, leading to a brighter appearance.
Interaction Effects
LTGs that are part of interacting systems show enhancements in color and size. This suggests that these interactions can trigger new star formation throughout the galaxy, making them appear bluer.
Importance
Studying LTGs helps astronomers understand how galaxies form and evolve over time. By observing their structures and star formation activities, researchers can gain insights into the life cycles of galaxies in various environments.