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arXiv 2402.01941astro-ph.SRastro-ph.EP
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IRAS 23077+6707的高分辨率Pan-STARRS与SMA观测:一个巨型侧向原行星盘

High-resolution Pan-STARRS and SMA observations of IRAS 23077+6707: A giant edge-on protoplanetary disk

Kristina Monsch, Joshua B. Lovell, Ciprian T. Berghea, Gordian Edenhofer, Garrett K. Keating, Sean M. Andrews, Ammar Bayyari, Jeremy J. Drake, David J. Wilner

AI总结:

本研究通过Pan-STARRS和SMA的多波段观测,发现IRAS 23077+6707是一个巨型富气的侧向原行星盘,若位于仙王座恒星形成区其半径可达数千天文单位,是迄今发现的尺度最大的该类天体。

摘要:

我们利用亚毫米波阵列(Submillimeter Array, SMA)获取了IRAS 23077+6707(“Dracula's Chivito”)的1.3毫米/225 GHz热尘埃与CO气体发射的分辨图像,并通过全景巡天望远镜与快速反应系统(Panoramic Survey Telescope and Rapid Response System, Pan-STARRS)获取了其光学(0.5-0.8μm)散射光图像。Pan-STARRS数据显示出光学散射尘埃的双极分布,这是高倾角下观测到的盘的典型特征。其散射光发射跨度约14角秒,两条高度不对称的纤维结构沿每个星云的上边界延伸约9角秒。SMA数据测量了1.3毫米连续谱尘埃以及¹²CO、¹³CO和C¹⁸O的J=2-1谱线发射,空间范围为12-14角秒;在位置-速度空间和各CO线谱中,气体均呈现出开普勒旋转盘的典型形态。IRAS 23077+6707尚无已发表的距离估计值,但如果它位于仙王座恒星形成区(180-800秒差距),其半径将达数千天文单位。综上,我们推断IRAS 23077+6707是一个巨型、富气的侧向原行星盘,据我们所知,它是目前已发现的空间尺度最大的此类天体。

英文摘要:

We present resolved images of IRAS 23077+6707 ("Dracula's Chivito") in 1.3 mm/225 GHz thermal dust and CO gas emission with the Submillimeter Array (SMA) and optical (0.5-$0.8\,μ\mathrm{m}$) scattered light with the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS). The Pan-STARRS data show a bipolar distribution of optically scattering dust that is characteristic for disks observed at high inclinations. Its scattered light emission spans ${\sim}14''$, with two highly asymmetric filaments extending along the upper bounds of each nebula by ${\sim}9''$. The SMA data measure 1.3 mm continuum dust as well as $^{12}$CO, $^{13}$CO and C$^{18}$O $J$=2$-$1 line emission over $12''$-$14''$ extents, with the gas presenting the typical morphology of a disk in Keplerian rotation, in both position-velocity space and in each CO line spectrum. IRAS 23077+6707 has no reported distance estimate, but if it is located in the Cepheus star-forming region (180-800 pc), it would have a radius spanning thousands of au. Taken together, we infer IRAS 23077+6707 to be a giant and gas-rich edge-on protoplanetary disk, which to our knowledge is the largest in extent so far discovered.

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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