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arXiv 1906.02708astro-ph.GA
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低表面亮度区的恒星形成效率

Star Formation Efficiency in Low Surface Brightness Regions

Francoise Combes

摘要:

低表面亮度区域不仅存在于矮星系和超扩散星系中,也存在于巨型螺旋星系的外部,或星系的延伸(潮汐或冲压压力尾,外流或喷流)。有时候,分子气体的数量足以形成恒星,但效率比盘星系低得多。本报告回顾了显示低表面亮度的不同环境,它们的气体含量和表面密度,以及它们的恒星形成效率。提出了一些解释来解释这种低效率。

英文摘要:

Low surface brightness regions are found not only in dwarf and ultra-diffuse galaxies, but also on the outer parts of giant spirals, or in galaxy extensions (tidal or ram-pressure tails, outflows or jets). Sometimes molecular gas is detected in sufficient quantities to allow star formation, but the efficiency is much lower than in disk galaxies. This presentation reviews different environments showing low-surface brightness, their gas content and surface densities, and their star formation efficiency. Some interpretations are proposed to account for this low efficiency.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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