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NGC 3310 and its tidal debris: remnants of galaxy evolution
Authors:E. H. Wehner  J. S. Gallagher  P. Papaderos  U. Fritze-von Alvensleben   K. B. Westfall
Affiliation:Department of Physics and Astronomy, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4M1, Canada;Department of Astronomy, University of Wisconsin-Madison, 475 North Charter Street, Madison, WI 53717, USA;Universitäts-Sternwarte, Institut für Astrophysik, Friedrich-Hund Platz 1, 37077 Göttingen, Germany;University of Hertfordshire, Centre for Astrophysics Research, College Lane, Hatfield AL10 9AB
Abstract:NGC 3310 is a local galaxy with an intense, ongoing starburst thought to result from a merger with a companion galaxy. It has several known tidal features in the northwest and southern regions around the main galactic disc, as well as a closed, tidal loop emerging from the eastern side of the disc and rejoining in the north. This loop appears to be distinct from the rest of the shells surrounding NGC 3310 and is the first of its kind to be detected in a starburst galaxy. In this work, we present U BV R photometry to faint surface brightness levels of this debris network, and we explore various strategies for modelling NGC 3310's disc and subtracting its contribution from each region of debris. We then compare these photometric results with the GALaxy EVolution (GALEV) spectral synthesis models, and find possible material from the intruder galaxy, suggesting that the recent accretion of several small galaxies is driving the evolution of NGC 3310.
Keywords:galaxies: evolution    galaxies: interactions    galaxies: photometry    galaxies: starburst
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