PGC 2933


PGC 2933, also known as LEDA 2933 or ESO 540-032, is a faint dwarf irregular galaxy in the Sculptor Group. It can be seen in the southern constellation Cetus. According to measurements, the galaxy is located 11.15 million light-years away. The stars within ESO 540-032 consist of mostly old red giant branch stars with poor metallicity and young stars with slightly higher metallicity. It may have a large globular cluster orbiting it.
Because it is situated in the Sculptor Group, it is one of the closest galaxies to the Milky Way. It is obscured by a few brighter stars and galaxies. The galaxy has a diameter of 2,000 light years.

Stellar population

The stellar population of this galaxy consist of old metal-poor AGB branch stars with a small population of slightly more metal-rich blue stars with young ages between 150-500 million years old. Theses stars are concentrated in the central regions of the galaxy. It star formation properties are similar to the Fornax dwarf galaxy, a dwarf galaxy in the Fornax constellation.

History

The star formation currently going on in ESO 540-032 likely originated from a single event comparable to the situation seen with the Phoenix dwarf galaxy. In the future, it will likely transition from a dwarf irregular galaxy into a dwarf elliptical galaxy.