An interaction scenario of the galaxy pair NGC 3893/96 (KPG 302). A single passage?
arXiv:1405.1446 · doi:10.1088/0004-637X/787/1/39
Abstract
Using the data obtained previously from Fabry-Perot interferometry, we study the orbital characteristics of the interacting pair of galaxies KPG 302 with the aim to estimate a possible interaction history, the conditions necessary for the spiral arms formation and initial satellite mass. We found by performing N-body/SPH simulations of the interaction that a single passage can produce a grand design spiral pattern in less than 1 Gyr. Althought we reproduce most of the features with the single passage, the required satellite to host mass ratio should be 1:5, which is not confirmed with the dynamical mass estimate made from the measured rotation curve. We conclude that a more realistic interaction scenario would require several passages in order to explain the mass ratio discrepancy.
arXiv commentAccepted for publication in ApJ. 10 pages, 12 figures. Animation of collision process can be viewed here: http://vimeo.com/84952794
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