Galaxy Formation and Chemical Evolution

• 作者: Sandeep Sahijpal
• 来源期刊: 天文学与天体物理学国际期刊(英文)
• 学科: 地球科学
• 关键词: GALACTIC Chemical Evolution GALAXY Formation SOLAR NEIGHBORHOOD SOLAR ELEMENTAL ABUNDANCES
• 年，卷（期）: 2014,（3）
• 页码范围: 491-498
• 页数: 8页
• 分类号: P1

摘要

The manner the galaxy accretes matter, along with the star formation rates at different epochs, influences the evolution of the stable isotopic inventories of the galaxy. A detailed analysis is presented here to study the dependence of the galactic chemical evolution on the accretion scenario of the galaxy along with the star formation rate during the early accretionary phase of the galactic thick disk and thin disk. Our results indicate that a rapid early accretion of the galaxy during the formation of the galactic thick disk along with an enhanced star formation rate in the early stages of the galaxy accretion could explain the majority of the galactic chemical evolution trends of the major elements. Further, we corroborate the recent suggestions regarding the formation of a massive galactic thick disk rather than the earlier assumed low mass thick disk.