Location of the bow shock ahead of cloud G2 at the Galactic Centre

被引：21

作者：

Sadowski, Aleksander ^{[1
]}

Narayan, Ramesh ^{[1
]}

Sironi, Lorenzo ^{[1
]}

Oezel, Feryal ^{[1
,2
]}

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[2] Univ Arizona, Tucson, AZ 85721 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2013年 / 433卷 / 03期

基金：

美国国家科学基金会;

关键词：

acceleration of particles; accretion; accretion discs; black hole physics; radiation mechanisms: non-thermal; SGR A-ASTERISK; SUPERMASSIVE BLACK-HOLE; ACCRETION FLOW; SAGITTARIUS-A; GRMHD SIMULATIONS; GAS; DYNAMICS; SCHEME; MODELS; GALAXY;

D O I：

10.1093/mnras/stt879

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We perform detailed magnetohydrodynamic simulations of the gas cloud G2 interacting with the accretion flow around the Galactic Centre black hole Sgr A*. We take as our initial conditions a steady-state, converged solution of the accretion flow obtained earlier using the general-relativistic magnetohydrodynamic code harm. Using the observed parameters for the cloud's orbit, we compute the interaction of the cloud with the ambient gas and identify the shock structure that forms ahead of the cloud. We show that for many configurations, the cloud front crosses the orbit pericentre seven to nine months earlier than the centre-of-mass.

引用

页码：2165 / 2171

页数：7

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