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arXiv 0910.3158astro-ph.SRastro-ph.IM
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最大质量恒星背景下的船底座η星

Eta Carinae in the Context of the Most Massive Stars

Theodore R. Gull, Augusto Damineli

摘要:

埃塔汽车,其历史爆发,可见的喷出物和巨大的,可变的风,继续挑战双方的观察员和建模。仅仅在过去的五年里,就有100多篇论文发表在这个迷人的物体上。我们现在知道它是一个巨大的双星系统,周期为5.54年。2009年1月,Eta Car经历了一个周期性的低态,与两颗大质量恒星的近星通过有关。这一事件受到从伽马射线到无线电的密集的多波长活动的监测。收集了大量的数据来测试一些不断发展的模型,包括大规模相互作用的风的三维模型。2009年8月是观察家和理论家聚在一起审查积累的研究的绝佳时机,自1998年以来专门讨论埃塔汽车的四次会议都是如此。事实上,埃塔汽车在最近的近星期表现得既可预测又不可预测,引发了及时的讨论。巧合的是,WR 140也在2009年初通过了近星点。它也是一个被深入研究的大质量相互作用双星。将它的性质以及其他大质量恒星的性质与Eta Car的性质进行比较是非常有益的。这些著名的演化大质量双星系统的例子为大多数大质量恒星的命运提供了许多线索。相互作用的风、单个恒星的旋转和星周物质对我们所看到的超新星/超新星有什么影响?我们希望学习。

英文摘要:

Eta Car, with its historical outbursts, visible ejecta and massive, variable winds, continues to challenge both observers and modelers. In just the past five years over 100 papers have been published on this fascinating object. We now know it to be a massive binary system with a 5.54-year period. In January 2009, Eta Car underwent one of its periodic low-states, associated with periastron passage of the two massive stars. This event was monitored by an intensive multi-wavelength campaign ranging from gamma-rays to radio. A large amount of data was collected to test a number of evolving models including 3-D models of the massive interacting winds. August 2009 was an excellent time for observers and theorists to come together and review the accumulated studies, as have occurred in four meetings since 1998 devoted to Eta Car. Indeed, Eta Car behaved both predictably and unpredictably during this most recent periastron, spurring timely discussions. Coincidently, WR140 also passed through periastron in early 2009. It, too, is a intensively studied massive interacting binary. Comparison of its properties, as well as the properties of other massive stars, with those of Eta Car is very instructive. These well-known examples of evolved massive binary systems provide many clues as to the fate of the most massive stars. What are the effects of the interacting winds, of individual stellar rotation, and of the circumstellar material on what we see as hypernovae/supernovae? We hope to learn.

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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