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arXiv 1707.04110astro-ph.EPastro-ph.SR
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尘埃生长和磁场:从地核到地核(甚至到行星)

Dust Growth and Magnetic Fields: from Cores to Disks (even down to Planets)

Yasuhiro Hasegawa, Jennifer I-Hsiu Li, Satoshi Okuzumi

摘要:

近年来,对星周盘和太阳系外行星的观测取得了快速进展,这加强了理解恒星和行星形成之间密切耦合的重要性。在这样的情况下,试图明确恒星形成区域中行星形成的时间和方式,并确定哪些物理过程/量对于在恒星和行星形成之间建立联系最重要,这可能是非常宝贵的。为此,我们最近开发了几个项目。其中包括一个关于0级YSO中尘埃增长的观测项目和一个HL Tauri盘的理论建模项目。对于第一个项目,我们利用无线电干涉观测的档案数据,并检查尘埃生长,行星形成的第一步,是否发生在0级YSO。我们发现,虽然我们的观测结果可以复制的存在下,一些YSO的单组分修改黑体形式主义的大($\sim$ mm)尘埃颗粒,没有尘埃生长的解释将是可能的,当使用一个更详细的模型。对于第二个项目,我们考虑HL金牛座周围的磁盘配置的起源,专注于磁场。我们发现,磁感应磁盘风可能在HL金牛座磁盘中发挥重要作用。这些尝试的结合可能使我们能够全面了解恒星和行星形成是如何相互密切联系的。

英文摘要:

The recent rapid progress in observations of circumstellar disks and extrasolar planets has reinforced the importance of understanding an intimate coupling between star and planet formation. Under such a circumstance, it may be invaluable to attempt to specify when and how planet formation begins in star-forming regions and to identify what physical processes/quantities are the most significant to make a link between star and planet formation. To this end, we have recently developed a couple of projects. These include an observational project about dust growth in Class 0 YSOs and a theoretical modeling project of the HL Tauri disk. For the first project, we utilize the archive data of radio interferometric observations, and examine whether dust growth, a first step of planet formation, occurs in Class 0 YSOs. We find that while our observational results can be reproduced by the presence of large ($\sim$ mm) dust grains for some of YSOs under the single-component modified blackbody formalism, an interpretation of no dust growth would be possible when a more detailed model is used. For the second project, we consider an origin of the disk configuration around HL Tauri, focusing on magnetic fields. We find that magnetically induced disk winds may play an important role in the HL Tauri disk. The combination of these attempts may enable us to move towards a comprehensive understanding of how star and planet formation are intimately coupled with each other.

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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