Tracing Planets in Circumstellar Discs Observability of Large-scale Disc Structures with ALMA
Tracing Planets in Circumstellar Discs Observability of Large-scale Disc Structures with ALMA
复制标题
使用 ALMA 追踪星周盘中的行星 大尺度盘结构的可观测性
DOI:
10.1051/epjconf/20134602003
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发表时间:
2013
期刊:
影响因子:
--
通讯作者:
H.H. Klahr
中科院分区:
文献类型:
--
作者:
J.P. Ruge;S. Wolf;A. Uribe;H.H. Klahr
Planets are assumed to form in circumstellar discs around young stellar objects. The additional gravitational potential of a planet perturbs the disc and leads to characteristic structures, i.e. spiral waves and gaps, in the disc density profile. We perform a large-scale parameter study on the observability of these planet-induced structures in circumstellar discs in the (sub)mm wavelength range for the Atacama Large (Sub)Millimeter Array (ALMA). On the basis of hydrodynamical and magneto-hydrodynamical simulations of star-disc-planet models we calculate the disc temperature structure and (sub)mm images of these systems. These are used to derive simulated ALMA maps. Because appropriate objects are frequent in the Taurus-Auriga region, we focus on a distance of 140 pc and a declination of ≈ 20°. The explored range of star-disc-planet configurations consists of six hydrodynamical simulations (including magnetic fields and different planet masses), nine disc sizes with outer radii ranging from 9 AU to 225 AU, 15 total disc masses in the range between 2.67·10-7M⊙and 4.10·10-2M⊙, six different central stars and two different grain size distributions, resulting in 10 000 disc models. At almost all scales and in particular down to a scale of a few AU, ALMA is able to trace disc structures induced by planet-disc interaction or the influence of magnetic fields in the wavelength range between 0.4...2.0 mm. In most cases, the optimum angular resolution is limited by the sensitivity of ALMA. However, within the range of typical masses of protoplane tary discs (0.1 M⊙...0.001 M⊙) the disc mass has a minor impact on the observability. At the distance of 140 pc it is possible to resolve discs down to 2.67·10-6M⊙and trace gaps in discs with 2.67·10-4M⊙with a signal-to-noise ratio greater than three. In general, it is more likely to trace planet-induced gaps in magneto-hydrodynamical disc models, because gaps are wider in the presence of magnetic fields [1]. We also find, that zonal flows resulting from magneto-rotational instability (MRI) create gap-like structures in the disc re-emission radiation which are observable with ALMA. Through the unprecedented resolution and sensitivity of ALMA in the (sub)mm wavelength range the expected detailed observations of planet-disc interaction and global disc structures will deepen our understanding of the planet formation and disc evolution process. This article presents a summary of the study published by [2].
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DOI:
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发表时间:
2013
期刊:
Proceedings of the International Astronomical Union
影响因子:
--
作者:
Jean;C. Pinte;S. Maddison;F. M'enard
通讯作者:
F. M'enard
DOI:
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发表时间:
2010
期刊:
影响因子:
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作者:
Z. Regály;Z. Sándor;C. Dullemond;R. Boekel
通讯作者:
R. Boekel
DOI:
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发表时间:
2003
期刊:
影响因子:
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作者:
H. Jang;D. Sasselov
通讯作者:
D. Sasselov
DOI:
10.1088/2041-8205/750/1/l21
发表时间:
2012-03
期刊:
The Astrophysical Journal Letters
影响因子:
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作者:
A. Boley;M. Payne;S. Corder;William R. F. Dent;Eric B. Ford;M. Shabram
通讯作者:
A. Boley;M. Payne;S. Corder;William R. F. Dent;Eric B. Ford;M. Shabram
DOI:
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发表时间:
2010
期刊:
影响因子:
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作者:
P. Cossins;G. Lodato;L. T. D. O. Physics;Astronomy;U. Leicester;UK Dipartimento di Fisica;U. Milano;I. E. G. Observatory;Garching;H Germany
通讯作者:
H Germany