NED Abstract 
Copyright by American Astronomical Society.
Reproduced by permission

2005AJ....130.1524P

The Interacting Galaxy Pair NGC 5394/95: Near-Infrared Photometry,
Structure, and Morphology 

Ivanio Puerari, Margarita Valdez-Gutierrez, and Izbeth Hernandez-Lopez 

Abstract. We present near-infrared observations in the J, H, and K'
passbands of the interacting pair of galaxies NGC 5394/95 (KPG 404). The
total magnitudes, colors, surface brightnesses, and color profiles are
calculated. In addition, aperture magnitudes are compared against previous
determinations. We also perform a structural (disk + bulge) analysis, as
well as a two-dimensional Fourier analysis, to gain insight into the
morphology of the pair. The disk + bulge fit shows that NGC 5394 (KPG 404A)
is more compact than normal galaxies, while NGC 5395 (KPG 404B) is less
concentrated. The two-dimensional Fourier analysis shows that NGC 5394 is
an H2{beta} galaxy in the dust-penetrated (DP) classification by Block &
Puerari. NGC 5395, in contrast, displays a very complex structure that
needs a number of Fourier coefficients to be explained. A tightly wound m=1
coefficient (DP class H1{alpha}) is the main structure, but other m=1 and
m=2 coefficients (suggesting modulation) are also present in the Fourier
spectra. The m=1 coefficients represent a pseudo-ring-type structure,
indicative of a collision rather than a passage. Based on our results we
are able to assert that the scenario of the interaction between the galaxy
members of KPG 404 should take into account a crossing of NGC 5394 through
the disk of NGC 5395 in a Cartwheel-like encounter rather than a passage as
in M51-type pairs. Numerical simulations could help to unravel the
structural and morphological evolution of this interacting pair. 

Keywords: Galaxies: Evolution, Galaxies: Fundamental Parameters,
Galaxies: Individual: NGC Number: NGC 5394, Galaxies: Individual:
NGC5395, Galaxies: Interactions, Galaxies: Structure, Infrared: Galaxies