Bibcode
DOI
Bekki, Kenji; Couch, Warrick J.; Beasley, Michael A.; Forbes, Duncan A.; Chiba, Masashi; Da Costa, Gary S.
Bibliographical reference
The Astrophysical Journal, Volume 610, Issue 2, pp. L93-L96.
Advertised on:
8
2004
Journal
Citations
72
Refereed citations
63
Description
The Large Magellanic Cloud (LMC) has a unique cluster formation history
in that nearly all of its globular clusters were formed either ~13 Gyr
ago or less than ~3 Gyr ago. It is not clear what physical mechanism is
responsible for the most recent cluster formation episode and thus the
mysterious age gap between the LMC clusters. We first present results of
gasdynamical N-body simulations of the evolution of the LMC in the
context of its Galactic orbit and interactions with the Small Magellanic
Cloud (SMC), paying special attention to the effect of tidal forces. We
find that the first close encounter between the LMC and the SMC about 4
Gyr ago was the beginning of a period of strong tidal interaction that
likely induced dramatic gas cloud collisions, leading to an enhancement
of the formation of globular clusters that has been sustained by strong
tidal interactions to the present day. The tidal interaction results in
the formation of a barred, elliptical thick disk in the LMC. The model
also predicts the presence of a large diffuse stellar stream circling
the Galaxy, which originated from the LMC.