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AN INTERACTION SCENARIO OF THE GALAXY PAIR NGC 3893/96 (KPG 302): A SINGLE PASSAGE?

2014; IOP Publishing; Volume: 787; Issue: 1 Linguagem: Inglês

10.1088/0004-637x/787/1/39

1538-4357

Ruslan Gabbasov, M. Rosado, Jaime Klapp,

Stellar, planetary, and galactic studies

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.