Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 433, Issue 4, Pages 2764-2789Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stt890
Keywords
surveys; galaxies: evolution; galaxies: formation; galaxies: interactions; galaxies: luminosity function; mass function; galaxies: starburst
Categories
Funding
- STFC (UK)
- ARC (Australia)
- AAO
- Alfred P. Sloan Foundation
- National Science Foundation
- US Department of Energy
- National Aeronautics and Space Administration
- Japanese Monbukagakusho
- Max Planck Society
- Higher Education Funding Council for England
- American Museum of Natural History
- Astrophysical Institute Potsdam
- University of Basel
- University of Cambridge
- Case Western Reserve University
- University of Chicago
- Drexel University
- Fermilab
- Institute for Advanced Study
- Johns Hopkins University
- Joint Institute for Nuclear Astrophysics
- Kavli Institute for Particle Astrophysics and Cosmology
- Chinese Academy of Sciences (LAMOST)
- Los Alamos National Laboratory
- Max-Planck-Institute for Astronomy (MPIA)
- Max-Planck-Institute for Astrophysics (MPA)
- New Mexico State University
- Ohio State University
- University of Pittsburgh
- University of Portsmouth
- Princeton University
- United States Naval Observatory
- University of Washington
- Australian Postgraduate Award
- Australian Astronomical Observatory PhD scholarship
- Science and Technology Facilities Council [ST/I000976/1]
- Science and Technology Facilities Council [ST/J002291/1, ST/H008578/1, ST/H004548/1, ST/I001166/1, ST/H007156/1, ST/I505905/1, ST/K00090X/1, ST/J001465/1, ST/G001987/1, ST/I000976/1, ST/I003088/1, ST/I00162X/1, ST/H00131X/1, ST/K003577/1, ST/I001212/1] Funding Source: researchfish
- STFC [ST/K003577/1, ST/J001465/1, ST/J002291/1, ST/G001987/1, ST/I001166/1, ST/I00162X/1, ST/I001212/1, ST/K00090X/1, ST/I003088/1, ST/H007156/1, ST/H004548/1, ST/I505905/1, ST/H00131X/1, ST/I000976/1, ST/H008578/1] Funding Source: UKRI
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Measurements of the low-z H alpha luminosity function, Phi, have a large dispersion in the local number density of sources (similar to 0.5-1 Mpc(-3) dex(-1)), and correspondingly in the star formation rate density (SFRD). The possible causes for these discrepancies include limited volume sampling, biases arising from survey sample selection, different methods of correcting for dust obscuration and active galactic nucleus contamination. The Galaxy And Mass Assembly (GAMA) survey and Sloan Digital Sky Survey (SDSS) provide deep spectroscopic observations over a wide sky area enabling detection of a large sample of star-forming galaxies spanning 0.001 < SFRH alpha (M-circle dot yr(- 1)) < 100 with which to robustly measure the evolution of the SFRD in the low-z Universe. The large number of high-SFR galaxies present in our sample allow an improved measurement of the bright end of the luminosity function, indicating that the decrease in Phi at bright luminosities is best described by a Saunders functional form rather than the traditional Schechter function. This result is consistent with other published luminosity functions in the far-infrared and radio. For GAMA and SDSS, we find the r-band apparent magnitude limit, combined with the subsequent requirement for H alpha detection leads to an incompleteness due to missing bright H alpha sources with faint r-band magnitudes.
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