Massive Stellar Cannibals: How Stellar Mergers Drive Mass-Loss in Extremely Massive Stars

Simulation outputs for stellar mergers of extremely massive stars using MESA. Description: results_1e3Msun.tar.zst: Compressed data including MESA history and profile files for stellar mergers involving a 1000 solar mass star. results_3e3Msun.tar.zst: Compressed data including MESA history and profile files for stellar mergers involving a 3000 solar mass star. results_5e3Msun.tar.zst: Compressed data including MESA history and profile files for stellar mergers involving a 5000 solar mass star. merger_discrimination.txt: Table summarizing the predicted mass loss produced during a stellar merger. The columns are: M_EMS: Extremely massive star mass in solar masses. M_COMP: Mass of the companion star in solar masses. L_R: Maximum latus rectum (in solar radii) to produce a direct merger for mergers with eccentricity of unity. Interactions with a latus rectum above this value will produce orbital scattering instead. R_EMS: Radius of the extremely massive star in solar radii. log10(E_orb): log10 of the orbital energy (erg) lost during the interaction, either during the merger or orbital scattering. M_UNB: Unbound mass in solar masses. This is the predicted mass loss. T_MERGER: Timescale in yr from the start of the interaction until either both stars merge or the companion exits the EMS.使用MESA开展的极超大质量恒星并合模拟输出结果。 数据集说明： results_1e3Msun.tar.zst：包含1000倍太阳质量恒星参与恒星并合的MESA历史文件与轮廓文件的压缩数据集。 results_3e3Msun.tar.zst：包含3000倍太阳质量恒星参与恒星并合的MESA历史文件与轮廓文件的压缩数据集。 results_5e3Msun.tar.zst：包含5000倍太阳质量恒星参与恒星并合的MESA历史文件与轮廓文件的压缩数据集。 merger_discrimination.txt：汇总恒星并合过程中预测质量损失的表格，各列含义如下： M_EMS：极超大质量恒星质量，单位为太阳质量。 M_COMP：伴星质量，单位为太阳质量。 L_R：偏心率为1的恒星并合事件中，实现直接并合所需的最大半通径（单位：太阳半径）。当相互作用的半通径大于该值时，将发生轨道散射而非直接并合。 R_EMS：极超大质量恒星的半径，单位为太阳半径。 log₁₀(E_orb)：相互作用过程（并合或轨道散射阶段）中损失的轨道能量的以10为底的对数值，单位为尔格（erg）。 M_UNB：无束缚质量，单位为太阳质量，即预测的质量损失量。 T_MERGER：从相互作用起始，至两颗恒星完成并合或伴星脱离极超大质量恒星系统为止的时间尺度，单位为年（yr）。