We determine the low-redshift field galaxy stellar mass function (GSMF) using an area of 143deg 2 from the first three years of the Galaxy And Mass Assembly (GAMA) survey. The magnitude limits of this redshift survey are r < 19.4mag over two-thirds and 19.8mag over one-third of the area. The GSMF is determined from a sample of 5210 galaxies using a density-corrected maximum volume method. This efficiently overcomes the issue of fluctuations in the number density versus redshift. With H 0= 70kms -1Mpc -1, the GSMF is well described between 10 8 and 10 11.5M ⊙ using a double Schechter function with M * = 10 10.66 M ⊙, π 1 * = 3.96 × 10 -3 Mpc -3, α 1=-0.35, π 2 * = 0.79 × 10 -3 Mpc -3 and α 2=-1.47. This result is more robust to uncertainties in the flow-model corrected redshifts than from the shallower Sloan Digital Sky Survey main sample (r < 17.8mag). The upturn in the GSMF is also seen directly in the i-band and K-band galaxy luminosity functions. Accurately measuring the GSMF below 10 8M ⊙ is possible within the GAMA survey volume but as expected requires deeper imaging data to address the contribution from low surface-brightness galaxies.
- Galaxies: distances and redshifts
- Galaxies: fundamental parameters
- Galaxies: luminosity function, mass function