Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-08-11
Mon.Not.Roy.Astron.Soc.372:977-991,2006
Astronomy and Astrophysics
Astrophysics
17 pages, 16 figures, Accepted for publication by MNRAS 2 August 2006
Scientific paper
10.1111/j.1365-2966.2006.10931.x
We present the result of investigations into two theories to explain the star formation rate-density relationship. For regions of high galaxy density, either there are fewer star forming galaxies, or galaxies capable of forming stars are present but some physical process is suppressing their star formation. We use HI Parkes All Sky Survey's (HIPASS) HI detected galaxies and infrared and radio fluxes to investigate star formation rates and efficiencies with respect to local surface density. For nearby (vel<10000 km\s) HI galaxies we find a strong correlation between HI mass and star formation rate. The number of HI galaxies decreases with increasing local surface density. For HI galaxies (1000
Doyle Marianne T.
Drinkwater Michael. J.
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