Alignment between Satellite and Central Galaxies in the EAGLE Simulation: Dependence on the Large-Scale Environments. (arXiv:1907.12768v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Zhang_M/0/1/0/all/0/1">Mingge Zhang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wang_Y/0/1/0/all/0/1">Yang Wang</a>
The alignment between satellite and central galaxies serves as a proxy for
addressing the issue of galaxy formation and evolution and has been
investigated abundantly in observations and theoretical works. Most scenarios
indicate that the satellites preferentially locate along the major axis of
their central galaxy. Recent work shows that the strength of alignment signals
depends on large-scale environment in observations. We use the
publicly-released data from EAGLE to figure out whether the same effect can be
found in the hydrodynamic simulation. We found much stronger environmental
dependency of alignment signal in simulation. And we also explore change of
alignments to address the formation of this effects.
The alignment between satellite and central galaxies serves as a proxy for
addressing the issue of galaxy formation and evolution and has been
investigated abundantly in observations and theoretical works. Most scenarios
indicate that the satellites preferentially locate along the major axis of
their central galaxy. Recent work shows that the strength of alignment signals
depends on large-scale environment in observations. We use the
publicly-released data from EAGLE to figure out whether the same effect can be
found in the hydrodynamic simulation. We found much stronger environmental
dependency of alignment signal in simulation. And we also explore change of
alignments to address the formation of this effects.
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