NGC 253 is an example of a starburst galaxy, a galaxy where many new stars are forming rapidly. These galaxies are often found to have high amounts of dust and gas, which fuel the rapid star formation. The star formation rate in NGC 253 is estimated to be around 3.5 solar masses per year, which is significantly higher than the average for spiral galaxies like the Milky Way.
Characteristics of NGC 253
NGC 253 is a spiral galaxy located in the constellation Sculptor, approximately 11.5 million light-years from Earth. It is one of the brightest and most prominent galaxies in the night sky, with a visual magnitude of 7.1. The galaxy’s high rate of star formation is believed to be due to the presence of a large amount of molecular gas, which is the raw material for the formation of new stars.
Supernovae and Supernova Remnants
NGC 253 is also known for its high rate of supernovae, with several supernova remnants having been detected in the galaxy. These supernovae are thought to be the result of the rapid star formation, as the massive stars formed in the starburst process end their lives in dramatic explosions.
The high rate of star formation and supernovae in NGC 253 is believed to be driven by the presence of a central bar structure, which can help to funnel gas and dust towards the center of the galaxy, fueling the starburst activity.