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Galaxy And Mass Assembly (GAMA): The galaxy stellar mass function at z < 0.06
- Source :
- Mon.Not.Roy.Astron.Soc. 421 (2012) 621-634
- Publication Year :
- 2011
-
Abstract
- We determine the low-redshift field galaxy stellar mass function (GSMF) using an area of 143 deg^2 from the first three years of the Galaxy And Mass Assembly (GAMA) survey. The magnitude limits of this redshift survey are r < 19.4 mag over two thirds and 19.8 mag 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 = 70, the GSMF is well described between 10^8 and 10^11.5 Msun using a double Schechter function with mass^* = 10^10.66 Msun, phi_1^* = 3.96 x 10^-3 Mpc^-3, alpha_1 = -0.35, phi_2^* = 0.79 x 10^-3 Mpc^-3 and alpha_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 < 17.8 mag). The upturn in the GSMF is also seen directly in the i-band and K-band galaxy luminosity functions. Accurately measuring the GSMF below 10^8 Msun is possible within the GAMA survey volume but as expected requires deeper imaging data to address the contribution from low surface-brightness galaxies.<br />Comment: v2; 15 pages, 17 figures, accepted by MNRAS, references updated, minor changes
- Subjects :
- Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- Database :
- arXiv
- Journal :
- Mon.Not.Roy.Astron.Soc. 421 (2012) 621-634
- Publication Type :
- Report
- Accession number :
- edsarx.1111.5707
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1111/j.1365-2966.2012.20340.x