FULLY COMPRESSIVE TIDES IN GALAXY MERGERS
FULLY COMPRESSIVE TIDES IN GALAXY MERGERS
复制标题
星系合并中的全压缩潮汐
DOI:
10.1088/0004-637x/706/1/67
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发表时间:
2009
期刊:
影响因子:
--
通讯作者:
Renaud
中科院分区:
文献类型:
--
作者:
Renaud
The disruptive effect of galactic tides is a textbook example of gravitational dynamics. However, depending on the shape of the potential, tides can also become fully compressive. When that is the case, they might trigger or strengthen the formation of galactic substructures (star clusters and tidal dwarf galaxies), instead of destroying them. We perform N-body simulations of interacting galaxies to quantify this effect. We demonstrate that tidal compression occurs repeatedly during a galaxy merger, independently of the specific choice of parameterization. With a model tailored to the Antennae galaxies, we show that the distribution of compressive tides matches the locations and timescales of observed substructures. After extending our study to a broad range of parameters, we conclude that neither the importance of the compressive tides (≈ 15% of the stellar mass) nor their duration (∼ 10 7 yr) is strongly affected by changes in the progenitors' configurations and orbits. Moreover, we show that individual clumps of matter can enter compressive regions several times in the course of a simulation. We speculate that this may spawn multiple star formation episodes in some star clusters, through, eg, enhanced gas retention.
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DOI:
10.1111/j.1365-2966.2009.14815.x
发表时间:
2009
影响因子:
4.8
作者:
C. Dobbs;J. Pringle
通讯作者:
J. Pringle
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
Andreas H. W. Kupper;A. Macleod;D. C. H. U. Bonn;U. Edinburgh
通讯作者:
U. Edinburgh
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
S. Laine;R. V. D. Marel;J. Rossa;T. Boeker;J. C. Mihos;J. Hibbard;A. I. Z. S. S. C. S. C. N. Obs.;A. Uof
通讯作者:
A. Uof
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
Ji;J. Wise;Tom Abel
通讯作者:
Tom Abel
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
K. Knierman;K. Knierman;S. Gallagher;S. Gallagher;J. Charlton;S. Hunsberger;B. Whitmore;A. Kundu;J. Hibbard;D. Zaritsky
通讯作者:
D. Zaritsky