PGC 2933

PGC 2933, also known as LEDA 2933 or ESO 540-032, is a faint dwarf irregular galaxy in the Sculptor Group.^[3] It can be seen in the southern constellation Cetus.^[4] 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 (GC) orbiting it.^[5]

PGC 2933
PGC 2933 in a Hubble Space Telescope photo
Observation data (J2000 epoch)
Constellation	Cetus
Right ascension	00h 50m 24.5s[1]
Declination	−19° 54′ 23″[1]
Redshift	0.000761[2]
Heliocentric radial velocity	228 km/s[2]
Distance	11.15
Group or cluster	Sculptor Group
Apparent magnitude (V)	16.01[1]
Apparent magnitude (B)	16.63
Characteristics
Type	dG[1]
Apparent size (V)	0.830′ × 0.512′[1]
Other designations
ESO 540-32, ESO-LV 540-0320, [FG85] 24, [KK98a] 10, [KK98a] 004756.0-201044, LEDA 2933, PGC 2933

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 brightest of them on the right side of the photo is 1425 light-years away from the Solar System).^[6] The galaxy has a diameter of 2,000 light years.^[7]

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.^[8] It star formation properties are similar to the Fornax dwarf galaxy, a dwarf galaxy in the Fornax constellation.^[5]

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.^[5]