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Triggering Star Formation by Galaxy-Galaxy Interactions

Published online by Cambridge University Press:  26 May 2016

P.B. Tissera ,
M.S. Alonso ,
D.G. Lambas  and
G. Coldwell
P.B. Tissera
Affiliation:
Institute of Astronomy and Space Science, Conicet, Argentina
M.S. Alonso
Affiliation:
Complejo Astronómico El Leoncito, Conicet, Argentina
D.G. Lambas
Affiliation:
IATE, Observatorio Astronómico Córdoba, Conicet, Argentina
G. Coldwell
Affiliation:
IATE, Observatorio Astronómico Córdoba, Conicet, Argentina

Abstract

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We analyzed the effects of having a close companion on the star formation activity of galaxies in the 8K galaxy pair catalog selected from the 2dFGRS. We found that, statistically, galaxies with rp < 25h−1 kpc and ΔV < 100km s−1 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, except in dense regions.

Type
Part 3. Ejection and Outflow
Information
Symposium - International Astronomical Union , Volume 217: Recycling Intergalactic and Interslettar Matter , 2004 , pp. 434 - 435
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

Alonso, M. S, Tissera, P. B., Coldwell, G., Lambas, D. G., 2003, submitted.Google Scholar
Barton, E. J., Geller, M. J., Kenyon, S. J., 2000, ApJ, 530, 660.Google Scholar
Lambas, D. G., Tissera, P. B., Alonso, M. S. Coldwell, G. 2003, MNRAS in press.Google Scholar