arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1209.0779astro-ph.EP
收藏

双星周围原行星盘的扩散

The dispersal of protoplanetary disks around binary stars

Richard Alexander

摘要:

我提出了围绕年轻双星的盘演化模型。我表明,在确定环双星磁盘寿命的主要因素是磁盘光蒸发率。我还发现,光蒸发清除留下了一个签名上的环联盘寿命的分布,与磁盘寿命急剧增加的二进制分离a<~0.3-1AU。因此,观测年轻的双星可以用来测试模型的磁盘演变,我表明,目前的数据设置了一个强大的上限,正在进行的光蒸发率(<1 e-9 M_sun/yr)。最后,我讨论了这些结果对行星形成的影响,并建议在近距离(a<~1AU)双星周围的环双星行星应该是相对常见的。

英文摘要:

I present models of disk evolution around young binary stars. I show that the primary factor in determining circumbinary disk lifetimes is the rate of disk photoevaporation. I also find that photoevaporative clearing leaves a signature on the distribution of circumbinary disk lifetimes, with a sharp increase in disk lifetimes for binary separations a<~0.3-1AU. Observations of young binary stars can therefore be used to test models of disk evolution, and I show that current data set a strong upper limit to the rate of on-going photoevaporation (<1e-9 M_sun/yr). Finally I discuss the implications of these results for planet formation, and suggest that circumbinary planets around close (a<~1AU) binaries should be relatively common.

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。

↑