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Near Infrared Photometry of Southern Pairs and Triplets of Galaxies

Published online by Cambridge University Press:  01 August 2006

Ivânio Puerari ,
Margarita Valdez-Gutiérrez ,
Sebastian Gurovich ,
Kenneth F. Freeman  and
Héctor Hernández-Toledo
Ivânio Puerari
Affiliation:
INAOE, Mexico
Margarita Valdez-Gutiérrez
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, campus Ensenada, B. C., Mexico
Sebastian Gurovich
Affiliation:
Research School of Astronomy and Astrophysics, The Australian National University, Australia
Kenneth F. Freeman
Affiliation:
Research School of Astronomy and Astrophysics, The Australian National University, Australia
Héctor Hernández-Toledo
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Mexico
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Abstract

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We present near infrared photometry of select pairs and triplets of galaxies observed with the CASPIR camera attached to the 2.3m Advanced Technology Telescope at Siding Spring Observatory, Australia. The preliminary results show that galaxies in pairs or triplets present near infrared colors that are redder than normal galaxies. We also performed a morphological analysis using bi-dimensional Fourier Transform techniques, as well as classical bulge + disk fits. Compared to isolated galaxies, the light distribution of galaxies in pairs and triplets often needs a larger number of Fourier coefficients to be well represented. Also, light profiles usually show deviations from the exponential disk (disk distortions, strong bars, etc.). In the future we intend to define some method to quantify the strength of the interactions by using the Fourier coefficients and/or the magnitude of the deviations from the classical Sersic + exponential laws.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 237
Copyright
Copyright © International Astronomical Union 2007

References

Hernández-Toledo, H.M., & Puerari, I. 2001, A&A 379, 54.Google Scholar
Puerari, I., & Dottori, H. 1992, A&AS 93, 469.Google Scholar