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arXiv 2108.13429astro-ph.EP
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初步证据表明,原行星盘喷出的质量比它们保留的更多

Preliminary Evidence That Protoplanetary Disks Eject More Mass Than They Retain

Amir Siraj, Abraham Loeb

摘要:

如果星际物体起源于原行星盘,它们可以用来校准这些盘喷射出的质量分数。星际天体1 I/`Oumuamua和2 I/Borisov的发现,加上流浪行星的统计数据,使得可以校准锁定在大小范围为$\sim 10^{4} - 10^{9} \; \mathrm{cm}$的星际天体中的质量。在这里,我们表明,至少需要恒星质量的$\sim 10\%$产生的星际天体的观察人口,与95\%的置信区间跨越$\sim 2\% - 50\%$。我们将这个量称为最小喷射分数(MEF),代表了对行星系形成的新约束,该约束要求每颗恒星需要处理的质量比最小质量太阳星云(MMSN)模型中的质量多一个数量级。未来发现的星际物体与LSST上的维拉C。鲁宾天文台将对我们的预测进行测试,并改进统计数据。

英文摘要:

If interstellar objects originate in protoplanetary disks, they can be used to calibrate the fraction of mass that such disks eject. The discoveries of interstellar objects 1I/`Oumuamua and 2I/Borisov, taken together with rogue planets statistics, allow for the calibration of mass locked in interstellar objects in size range $\sim 10^{4} - 10^{9} \; \mathrm{cm}$. Here, we show that at least $\sim 10\%$ of stellar mass is required to produce the observed population of interstellar objects, with a 95\% confidence interval spanning $\sim 2\% - 50\%$. We call this quantity the Minimum Ejection Fraction (MEF), representing a new constraint on planetary system formation that necessitates an order of magnitude more mass to be processed per star than in the Minimum Mass Solar Nebula (MMSN) model. Future discoveries of interstellar objects with LSST on the Vera C. Rubin Observatory will provide a test of our predictions and improve the statistics.

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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