2009/10/07 by Lingyu Wang, Michael Rowan-Robinson · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Elliptical galaxy #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy formation and evolution #Luminosity #Luminosity function #Luminous infrared galaxy #Redshift #Star formation #Stellar, planetary, and galactic studies #Universe #astro-ph.CO
paper · pdf · doi:10.1111/j.1365-2966.2009.15709.x
15 pages, 11 figures, accepted for publication in MNRAS
arxiv created 2009/10/07 · openalex publication_date 2009/11/10 · arxiv updated 2015/05/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present the luminosity function and selection function of 60 μm galaxies selected from the Imperial IRAS-FSC Redshift Catalogue. Three methods, including the 1/Vmax and the parametric and non-parametric maximum-likelihood estimators, are used and the results agree well with each other. A density evolution ∝ (1 +z)3.4±0.9 or a luminosity evolution ∝ exp(1.7 tL/τ), where tL is the look-back time, is detected in the full sample in the redshift range [0.02, 0.1], consistent with previous analyses. Of the four infrared subpopulations, cirrus-type galaxies and M82-type starbursts show similar evolutionary trends, galaxies with significant active galactic nucleus contributions show stronger positive evolution and Arp 220-type starbursts exhibit strong negative evolution. The dominant subpopulation changes from cirrus-type galaxies to M82-type starbursts at log10(L60/L⊙) ≈ 10.3. In the second half of the paper, we derive the projected two-point spatial correlation function for galaxies of different infrared template types. The mean relative bias between cirrus-type galaxies and M82-type starbursts, which correspond to quiescent galaxies with optically thin interstellar dust and actively star-forming galaxies, respectively, is calculated to be bcirrus/bM82= 1.25 ± 0.07. The relation between the current star formation rate (SFR) in star-forming galaxies and environment is investigated by looking at the dependence of clustering on infrared luminosity. We found that M82-type actively star-forming galaxies show stronger clustering as infrared luminosity/SFR increases. The correlation between the clustering strength and SFR in the local Universe seems to echo the basic trend seen in star-forming galaxies in the Great Observatories Origins Deep Survey fields (at z∼ 1).