N-body simulation of planetary formation through pebble accretion in a radially structured protoplanetary disk

IF 2.2 4区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Publications of the Astronomical Society of Japan Pub Date : 2023-09-07 DOI:10.1093/pasj/psad053
Tenri Jinno, Takayuki R Saitoh, Yota Ishigaki, Junichiro Makino
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Abstract

Abstract In the conventional theory of planet formation, it is assumed that protoplanetary disks are axisymmetric and have a smooth radial profile. However, recent radio observations of protoplanetary disks have revealed that many of them have complex radial structures. In this study, we perform a series of N-body simulations to investigate how planets are formed in protoplanetary disks with radial structures. For this purpose, we consider the effect of continuous pebble accretion onto the discontinuity boundary within the terrestrial planet-forming region (∼0.6 au). We find that protoplanets grow efficiently at the discontinuity boundary, reaching the Earth mass within ∼104 yr. We confirm that giant collisions of protoplanets occur universally in our model. Moreover, we find that multiple planet-sized bodies form at regular intervals in the vicinity of the discontinuity boundary. These results indicate the possibility of the formation of solar system-like planetary systems in radially structured protoplanetary disks.
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在放射状结构的原行星盘中通过卵石吸积形成行星的n体模拟
在传统的行星形成理论中,假设原行星盘是轴对称的,具有光滑的径向轮廓。然而,最近对原行星盘的射电观测显示,其中许多原行星盘具有复杂的径向结构。在这项研究中,我们进行了一系列的n体模拟来研究行星是如何在具有径向结构的原行星盘中形成的。为此,我们考虑了连续卵石增生对类地行星形成区域(~ 0.6 au)内不连续边界的影响。我们发现原行星在不连续边界有效地生长,在~ 104年内达到地球质量。我们证实,在我们的模型中,原行星的巨大碰撞普遍发生。此外,我们发现在不连续边界附近以规则的间隔形成多个行星大小的天体。这些结果表明,在放射状结构的原行星盘中可能形成类似太阳系的行星系统。
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来源期刊
Publications of the Astronomical Society of Japan
Publications of the Astronomical Society of Japan 地学天文-天文与天体物理
CiteScore
4.10
自引率
13.00%
发文量
98
审稿时长
4-8 weeks
期刊介绍: Publications of the Astronomical Society of Japan (PASJ) publishes the results of original research in all aspects of astronomy, astrophysics, and fields closely related to them.
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