Large Velocity Gradients in the Tidal Tails of the Interacting Galaxy AM 1353-272 ("The Dentist's Chair")

Details Large Velocity Gradients in the Tidal Tails of the Interacting Galaxy AM 1353-272 ("The Dentist's Chair") Large Velocity Gradients in the Tidal Tails of the Interacting Galaxy AM 1353-272 ("The Dentist's Chair")

2002-10-08

arxiv.org/abs/astro-ph/0210173v1

Astrophys.J. 579 (2002) L79-L82

Astronomy and Astrophysics

Astrophysics

3 color figures, to appear 10. Nov. 2002 in ApJL

Scientific paper

10.1086/345318

We present VLT observations of the interacting system AM 1353-272. Using the FORS2 instrument, we studied the kinematics of the ionized gas along its prominent tidal tails and discovered strikingly large velocity gradients associated with seven luminous tidal knots. These kinematical structures cannot be caused by streaming motion and most likely do not result from projection effects. More probably, instabilities in the tidal tails have lead to the formation of kinematically decoupled objects which could be the progenitors of self-gravitating Tidal Dwarf Galaxies.

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