Debris disc formation induced by planetary growth
Debris disc formation induced by planetary growth
复制标题
行星生长引起的碎片盘形成
DOI:
10.1093/mnras/stu1073
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发表时间:
2014
影响因子:
4.8
通讯作者:
T. Löhne
中科院分区:
文献类型:
--
作者:
H. Kobayashi;T. Löhne
Several hundred stars older than 10 million years have been observed to have infrared excesses. These observations are explained by dust grains formed by the collisional fragmentation of hidden planetesimals. Such dusty planetesimal discs are known as debris discs. In a dynamically cold planetesimal disc, collisional coagulation of planetesimals produces planetary embryos which then stir the surrounding leftover planetesimals. Thus, the collisional fragmentation of planetesimals that results from planet formation forms a debris disc. We aim to determine the properties of the underlying planetesimals in debris discs by numerically modelling the coagulation and fragmentation of planetesimal populations. The brightness and temporal evolution of debris discs depend on the radial distribution of planetesimal discs, the location of their inner and outer edges, their total mass, and the size of planetesimals in the disc. We find that a radially narrow planetesimal disc is most likely to result in a debris disc that can explain the trend of observed infrared excesses of debris discsvvv around G-type stars, for which planet formation occurs only before 100 million years. Early debris disc formation is induced by planet formation, while the later evolution is explained by the collisional decay of leftover planetesimals around planets that have already formed. Planetesimal discs with underlying planetesimals of radii ∼100 km at ≈30 au most readily explain theSpitzer Space Telescope24 and 70 μm fluxes from debris discs around G-type stars.
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DOI:
10.1086/498929
发表时间:
2005
期刊:
The Astrophysical Journal
影响因子:
--
作者:
D. Hines;D. Backman;J. Bouwman;L. Hillenbrand;J. Carpenter;M. Meyer;J. Kim;M. Silverstone;J. Rodmann;S. Wolf;E. Mamajek;T. Brooke;D. Padgett;T. Henning;A. Moro;E. Stobie;K. Gordon;J. Morrison;J. Muzerolle;K. Su
通讯作者:
K. Su
DOI:
10.1111/j.1365-2966.2010.16528.x
发表时间:
2010
影响因子:
4.8
作者:
Grant M. Kennedy;M. Wyatt
通讯作者:
M. Wyatt
DOI:
10.1086/379854
发表时间:
2003
期刊:
The Astronomical Journal
影响因子:
--
作者:
S. Kenyon;B. Bromley
通讯作者:
B. Bromley
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
L. Hillenbrand;J. Carpenter;J. Kim;M. Meyer;D. Backman;A. Moro;D. Hollenbach;D. Hines;I. Pascucci;J. Bouwman
通讯作者:
J. Bouwman
DOI:
10.1088/0004-637x/691/2/l133
发表时间:
2009-02
期刊:
The Astrophysical Journal
影响因子:
--
作者:
S. Stewart;Z. Leinhardt
通讯作者:
S. Stewart;Z. Leinhardt