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A Fourier Analysis of the Interacting Pair of Galaxies KPG 404 (NGC 5394/95)

Published online by Cambridge University Press:  26 May 2016

Ivânio Puerari ,
Margarita Valdez-Gutiérrez  and
Izbeth Hernández-López
Ivânio Puerari
Affiliation:
INAOE, Calle Luis Enrique Erro #1, 72840 Tonantzintla, Pue, Mexico
Margarita Valdez-Gutiérrez
Affiliation:
Departamento de Astronomía, Universidad de Guanajuato, Apartado Postal 144, 36000 Guanajuato, Gto, Mexico
Izbeth Hernández-López
Affiliation:
INAOE, Calle Luis Enrique Erro #1, 72840 Tonantzintla, Pue, Mexico

Abstract

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We present a bi-dimensional Fourier analysis of near-infrared images of KPG 404 (NGC 5394/95). The 2D Fourier analysis shows that NGC 5394 is a H2β galaxy in the DP classification (Block & Puerari 1999). In contrast, NGC 5395 displays a very complex structure which needs a number of Fourier coefficients to be explained. A tightly wound m = 1 (DP class H1α) is the main structure, but other m = 1 and m = 2 coefficients (suggesting spiral arm modulation) are also present in the Fourier spectra. The complex structure of NGC 5395 also suggests a strong interaction in the pair. The m = 1 coefficients can represent a pseudo ring-type structure, resulting of a collision rather than a grazing passage. We conclude that the most probable scenario of the interaction in this pair should take into account a crossing of NGC 5394 through the disk of NGC 5395.

Type
Part 3. Ejection and Outflow
Information
Symposium - International Astronomical Union , Volume 217: Recycling Intergalactic and Interslettar Matter , 2004 , pp. 426 - 427
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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