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盘演化
盘的形成
分子云/核 塌缩成盘
行星形成行星系统
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原行星盘的观测
HH 30
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原行星盘的观测
HL Tau, ALMA 2014
Muller+2018Perez+2016
Andrews+2016
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原行星盘的基本结构
Cold icy dustUV, X-ray
Photodesorption
Dust settlingand growthMolecules
PhotodissociationPhotoionization
Cosmic ray
Turbulence?
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盘化学的数值模拟
Continuum radiative transfer
Thermochemical calculation
Ray-tracing
Dust temperature and radiation field
Gas temperature, abundances of species
Spectra, images
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盘的密度、温度、化学结构
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盘的密度、温度、化学结构
Du+2014
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模型基本参数
❏ 恒星参数
❏ 质量
❏ 发射能谱
❏ X-ray
❏ UV, Lyman
❏ Optical, infrared, ...
❏ 盘参数
❏ 质量
❏ 面密度分布
❏ 大小 rin, rout
❏ 化学参数
❏ 反应网络
❏ 元素丰度
Cleeves+2013Herczeg+2002,2004
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测量盘的质量 — 尘埃质量
SED fitting
Robitaille+2007
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测量盘的质量 — 气体质量
● CO
● HD: 氢分子气体的最忠实探针 (如果知道温度结构的话)
Bergin+2013
McClure+2016
TW Hya
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模型与观测比较
盘气体质量 + 其它参数
谱线强度, 与观测比较
模型计算
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Volatile depletion: 观测丰度低于模型预期
Du+2015See also Favre+2013, Schwarz+2016,
Kama+2016, Long+2017
模型输出
观测值
TW Hya
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Volatile depletion: 多个盘中水分子发射线的缺失
Du+2017
● Oxygen depleted by at least ~100
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Hydrocarbon rings:O and C deplete differently?
TW Hya DM Tau
Bergin+2016
Observed images
Model images
Underlying elemental distribution
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物理机制
气体分子凝结
尘埃合并生长
尘埃沉降
湍流搅动
尘埃输运
See Kama+2016
完全物理自洽的模型还没有
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Thanks!