DOI: 10.1016/j.epsl.2018.09.030
Scopus记录号: 2-s2.0-85054443530
论文题名: The background temperature of the protoplanetary disk within the first four million years of the Solar System
作者: Schrader D.L. ; Fu R.R. ; Desch S.J. ; Davidson J.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 504 起始页码: 30
结束页码: 37
语种: 英语
英文关键词: background temperature
; chondrule
; cooling rate
; protoplanetary disk
; shock
; sulfide
Scopus关键词: Silicate minerals
; Solar system
; Sulfur compounds
; Background temperature
; chondrule
; Cooling rates
; Protoplanetary disks
; shock
; sulfide
; Cooling
英文摘要: The background temperature of the protoplanetary disk is a fundamental but poorly constrained parameter that strongly influences a wide range of conditions and processes in the early Solar System, including the widespread process(es) by which chondrules originate. Chondrules, mm-scale objects composed primarily of silicate minerals, were formed in the protoplanetary disk almost entirely during the first four million years of Solar System history but their formation mechanism(s) are poorly understood. Here we present new constraints on the sub-silicate solidus cooling rates of chondrules at <873 K (600 °C) using the compositions of sulfide minerals. We show that chondrule cooling rates remained relatively rapid (∼100 to 101 K/hr) between 873 and 503 K, which implies a protoplanetary disk background temperature of <503 K (230 °C) and is consistent with many models of chondrule formation by shocks in the solar nebula, potentially driven by the formation of Jupiter and/or planetary embryos, as the chondrule formation mechanism. This protoplanetary disk background temperature rules out current sheets and resulting short-circuit instabilities as the chondrule formation mechanism. More detailed modeling of chondrule cooling histories in impacts is required to fully evaluate impacts as a chondrule formation model. These results motivate further theoretical work to understand the expected thermal evolution of chondrules at ≤873 K under a variety of chondrule formation scenarios. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109604
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Center for Meteorite Studies, School of Earth and Space Exploration, Arizona State University, 781 East Terrace Road, Tempe, AZ 85287, United States; Department of Earth and Planetary Sciences, Harvard University, 20 Oxford St., Cambridge, MA 02138, United States; School of Earth and Space Exploration, Arizona State University, PO Box 871404, Tempe, AZ 85287, United States
Recommended Citation:
Schrader D.L.,Fu R.R.,Desch S.J.,et al. The background temperature of the protoplanetary disk within the first four million years of the Solar System[J]. Earth and Planetary Science Letters,2018-01-01,504