The gigantic interacting galaxy NGC 6872 |
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| Authors: | C Horellou B Koribalski |
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| Institution: | (1) Onsala Space Observatory, Chalmers University of Technology, SE-439 92 Onsala, Sweden;(2) Australia Telescope National Facility, CSIRO, P.O. Box 76, Epping, 1710, Australia E-mail |
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| Abstract: | The luminous barred galaxy NGC 6872 is one of the largest spiral galaxies known. Star formation is traced all along the arms,
which extend over more than 100 kpc. The galaxy is likely to be affected by tidal perturbations from the nearby companion
IC 4970 passing by on a low-inclination, prograde orbit. We have mapped the large-scale distribution and kinematics of the
atomic gas in the NGC 6872/IC 4970 system and carried out N-body simulations. Our aim is to investigate the evolution of gas
and stars in such close encounters, examine the influence of a dark matter halo on the length of the tidal tails, and test
models of collisionally induced star formation.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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