Simulations on the survivability of Tidal Dwarf Galaxies
Sylvia Ploeckinger, Simone Recchi, Gerhard Hensler, Pavel Kroupa
TL;DR
This study uses detailed numerical simulations to assess the survivability of Tidal Dwarf Galaxies over billions of years, considering stellar feedback and tidal forces, showing they can persist without dark matter.
Contribution
It provides the first comprehensive simulation-based analysis of TDG survivability over gigayear timescales without dark matter.
Findings
All simulated TDGs survive up to 3 Gyr.
Stellar feedback impacts short-term evolution.
Long-term survival is possible without dark matter.
Abstract
We present detailed numerical simulations of the evolution of Tidal Dwarf Galaxies (TDGs) after they kinematically decouple from the rest of the tidal arm to investigate their survivability. Both the short-term (500 Myr) response of TDGs to the stellar feedback of different underlying stellar populations as well as the long-term evolution that is dominated by a time dependent tidal field is examined. All simulated TDGs survive until the end of the simulation time of up to 3 Gyr, despite their lack of a stabilising dark matter component.
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