arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1407.7033astro-ph.IMastro-ph.EP
收藏

行星形成成像仪(PFI)的科学案例

The Science Case for the Planet Formation Imager (PFI)

Stefan Kraus, John Monnier, Tim Harries, Ruobing Dong, Matthew Bate, Barbara Whitney, Zhaohuan Zhu, David Buscher, Jean-Philippe Berger, Chris Haniff, Mike Irel… 展开作者

Stefan Kraus, John Monnier, Tim Harries, Ruobing Dong, Matthew Bate, Barbara Whitney, Zhaohuan Zhu, David Buscher, Jean-Philippe Berger, Chris Haniff, Mike Ireland, Lucas Labadie, Sylvestre Lacour, Romain Petrov, Steve Ridgway, Jean Surdej, Theo ten Brummelaar, Peter Tuthill, Gerard van Belle

摘要:

在当代天体物理学中最吸引人和最激烈争论的领域之一是行星系统是如何从伴随恒星诞生的巨大旋转的气体和尘埃盘中组装起来的。尽管在理论和观测方面已经进行了重要的工作,而且仍在进行,但只有打开观测窗口,直接见证这一过程,才能全面了解行星形成的物理学。然后,关键要求是在材料组装的自然空间尺度上探测行星形成系统。根据定义,这就是所谓的希尔球,它描绘了一个引力体在其周围环境中的影响区域。行星形成成像仪项目(PFI)围绕着这一具有挑战性的目标进行了结晶:在最近的恒星形成区域的候选行星承载盘内提供希尔球体大小结构的分辨率图像。在这篇文章中,我们概述了PFI的主要科学案例。为此,我们简要回顾我们的知识行星形成过程,并讨论最近的观测结果,已获得的过渡盘类。对这些系统进行的分光光度和多波长干涉测量研究表明,存在着可能由轨道行星引起的扩展间隙和复杂的密度不均匀性。我们提出了详细的三维辐射流体动力学模拟磁盘与单个和多个嵌入式行星,从中我们计算合成图像在近红外,中红外,远红外和亚毫米波长,使直接比较的签名,可检测与PFI和补充设施,如ALMA。从这些模拟,我们得出一些初步的规格,将指导该设施的阵列设计和技术路线图。

英文摘要:

Among the most fascinating and hotly-debated areas in contemporary astrophysics are the means by which planetary systems are assembled from the large rotating disks of gas and dust which attend a stellar birth. Although important work has already been, and is still being done both in theory and observation, a full understanding of the physics of planet formation can only be achieved by opening observational windows able to directly witness the process in action. The key requirement is then to probe planet-forming systems at the natural spatial scales over which material is being assembled. By definition, this is the so-called Hill Sphere which delineates the region of influence of a gravitating body within its surrounding environment. The Planet Formation Imager project (PFI) has crystallized around this challenging goal: to deliver resolved images of Hill-Sphere-sized structures within candidate planet-hosting disks in the nearest star-forming regions. In this contribution we outline the primary science case of PFI. For this purpose, we briefly review our knowledge about the planet-formation process and discuss recent observational results that have been obtained on the class of transition disks. Spectro-photometric and multi-wavelength interferometric studies of these systems revealed the presence of extended gaps and complex density inhomogeneities that might be triggered by orbiting planets. We present detailed 3-D radiation-hydrodynamic simulations of disks with single and multiple embedded planets, from which we compute synthetic images at near-infrared, mid-infrared, far-infrared, and sub-millimeter wavelengths, enabling a direct comparison of the signatures that are detectable with PFI and complementary facilities such as ALMA. From these simulations, we derive some preliminary specifications that will guide the array design and technology roadmap of the facility.

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。

↑