揭示水母星系恒星形成活动与公羊压力剥离的关系

Jeong Hwan Lee, M. Lee, Jae Yeon Mun, Brian S. Cho, Jisu Kang
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引用次数: 0

摘要

水母星系是一种星暴星系,具有冲压压力条带尾巴和蓝色恒星形成结。这些星系显示了冲压压力剥离(RPS)触发的恒星形成增强的快照,是研究富气体星系中RPS诱导的恒星形成的重要目标。在这里,我们利用双子座GMOS/IFU观测研究了大质量星团中五个水母星系的恒星形成活动。从h α衍生的恒星形成速率(SFRs)中,我们发现我们的样品比低质量星团中的水母星系对恒星形成主序列的SFR有更高的过剩。从编制的低质量到高质量宿主星团的水母星系样本中,我们认为水母星系的恒星形成活动与宿主星团质量和RPS程度呈正相关。这些关系表明,在RPS的早期阶段,较高的撞击压力环境往往会引发水母星系中更强的星暴。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Revealing the Relation between Star Formation Activity of Jellyfish Galaxies and Ram Pressure Stripping
Abstract Jellyfish galaxies are starburst galaxies with ram-pressure-stripped tails and blue star-forming knots. These galaxies show a snapshot of star formation enhancement triggered by ram pressure stripping (RPS), being important targets for studying the RPS-induced star formation in gas-rich galaxies. Here we investigate the star formation activity of five jellyfish galaxies in massive clusters, using Gemini GMOS/IFU observations. From the Hα-derived star formation rates (SFRs), we find that our sample shows higher SFR excess to the star formation main sequence than the jellyfish galaxies in low-mass clusters. From the compiled sample of jellyfish galaxies in low-mass to high-mass host clusters, we suggest that the star formation activity of jellyfish galaxies has positive correlations with host cluster mass and degree of RPS. These relationships imply that higher ram pressure environments tend to trigger stronger starbursts in jellyfish galaxies in the early stage of RPS.
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