论文标题
Cielo项目I的组中的卫星星系I。
Satellite galaxies in groups in the CIELO Project I. Gas removal from galaxies and its re-distribution in the intragroup medium
论文作者
论文摘要
我们研究环境对星系落入并在当地群体（LG）类似物的潜在孔中的轨道时的影响，其跟随它们的节奏很高。该分析是对来自流体动力学模拟的CIELO套件的八个圆盘卫星星系进行的。所有星系都在$ [10^{8.1} -10^{9.56}] M _ {\ sun} $ H $^{ - 1} $的范围内具有出色的质量。我们测量潮汐扭矩，RAM压力和特定的恒星形成速率（SSFR）随时间的函数，并将它们与卫星沿轨道损失的气体量相关。当圆盘平面垂直于运动方向时，会发生更强的去除发作。需要一个以上的围膜来显着修改圆盘相对于轨道平面的方向。根据轨道构型，与运动方向相反，与中央星系相互作用时去除的气体也可以发现。当星系达到其第一个围绕时，卫星并没有完全淬火，并在此次活动结束后继续形成最终恒星质量的10美元。发现除去的气体的比例是潮汐扭矩和RAM压力的联合作用的产物，这也可能触发新的星形形成活动以及随后的超新星反馈。
We study the impact of the environment on galaxies as they fall in and orbit in the potential well of a Local Group (LG) analogue, following them with high cadence. The analysis is performed on eight disc satellite galaxies from the CIELO suite of hydrodynamical simulations. All galaxies have stellar masses within the range $[10^{8.1} - 10^{9.56}] M_{\sun} $h$^{-1}$. We measure tidal torques, ram pressure and specific star formation rates (sSFR) as a function of time, and correlate them with the amount of gas lost by satellites along their orbits. Stronger removal episodes occur when the disc plane is oriented perpendicular to the direction of motion. More than one peripassage is required to significantly modify the orientations of the discs with respect to the orbital plane. The gas removed during the interaction with the central galaxies may be also found opposite to the direction of motion, depending on the orbital configuration. Satellites are not totally quenched when the galaxies reach their first peripassage, and continue forming about $10\%$ of the final stellar mass after this event. The fraction of removed gas is found to be the product of the joint action of tidal torque and ram pressure, which can also trigger new star formation activity and subsequent supernova feedback.
