oceanus: Populations of stellar streams in deforming MW--LMC systems - I

We publish oceanus, the t = 0 Gyr simulation snapshots of all 16,384 streams in each MW--LMC potential used in Brooks, R. A. N et al. (2024). The first part of the archived data includes:

rigid-mw-woutmotion-nolmc.hdf5 - dataset for the stream population generated in the "Rigid MW without motion (no LMC)" potential.

rigid-mw-wmotion-nolmc.hdf5 - dataset for the stream population generated in the "Rigid MW + motion (no LMC)" potential.

rigidmono-wlmc.hdf5 - dataset for the stream population generated in the "Rigid Monopole & LMC" potential.

evolmono-wlmc.hdf5 - dataset for the stream population generated in the "Evolving Monopole & LMC" potential.

Each stream contains 20,000 particles with 3-D Galactocentric positions and velocities, plus progenitor information on its initial conditions, mass and scale radius. We do not include summary statistic values. The functions to calculate stream summary statistics will be shared upon reasonable request. This dataset can be used to explore the effect of the LMC and the MW halo response on MW streams.

The basis function expansion MW--LMC potentials can be found and installed using instruction at: https://github.com/sophialilleengen/mwlmc.

我们发布了Oceanus数据集，即Brooks、R. A. N等人（2024）的研究中所使用的、所有银河系（Milky Way, MW）-大麦哲伦星系（Large Magellanic Cloud, LMC）势场下16384条星流的t=0吉年（Gyr）模拟快照。归档数据集的第一部分包含如下内容：
rigid-mw-woutmotion-nolmc.hdf5：采用"刚性银河系无运动（无大麦哲伦星系）"势场生成的星流种群数据集；
rigid-mw-wmotion-nolmc.hdf5：采用"刚性银河系带运动（无大麦哲伦星系）"势场生成的星流种群数据集；
rigidmono-wlmc.hdf5：采用"刚性单极子（monopole）与大麦哲伦星系"势场生成的星流种群数据集；
evolmono-wlmc.hdf5：采用"演化单极子与大麦哲伦星系"势场生成的星流种群数据集；
每条星流包含20000个粒子，携带有三维银心系位置与速度信息，同时附带其初始条件、质量与尺度半径的前身星相关信息。本数据集未包含统计汇总值，如需获取用于计算星流统计汇总值的相关函数，可通过合理申请获得。该数据集可用于探究大麦哲伦星系与银河系晕响应对银河系星流的影响效应。可通过下述网址的安装说明获取并安装基于基函数展开的银河系-大麦哲伦星系势场：https://github.com/sophialilleengen/mwlmc。