Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-10-20
Astronomy and Astrophysics
Astrophysics
to appear in Recycling intergalactic and intersetellar matter, IAUSS Vol 217, 2004
Scientific paper
We analyzed the effects of having a close companion on the star formation activity of galaxies in 8K galaxy pair catalog selected from the 2dFGRS. We found that, statistically, galaxies with $r_{\rm p} < 25 {\rm h^{-1}}$ kpc and $\Delta V < 100 {\rm km/s}$ have enhanced star formation with respect to isolated galaxies with the same luminosity and redshift distribution. Our results suggest that the physical processes at work during tidal interactions can overcome the effects of environment, expect in dense regions.
Alonso Sol M.
Coldwell Georgina
Lambas Diego G.
Tissera Patricia Beatriz
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