Distinguishing an ejected blob from alternative flare models at the Galactic centre with GRAVITY
arXiv:1404.6149 · doi:10.1093/mnras/stu812
Abstract
The black hole at the Galactic centre exhibits regularly flares of radiation, the origin of which is still not understood. In this article, we study the ability of the near-future GRAVITY infrared instrument to constrain the nature of these events. We develop realistic simulations of GRAVITY astrometric data sets for various flare models. We show that the instrument will be able to distinguish an ejected blob from alternative flare models, provided the blob inclination is >= 45deg, the flare brightest magnitude is 14 <= mK <= 15 and the flare duration is >= 1h30.
11 pages, 9 figures, accepted by MNRAS
References in corpus (8)
- The Submillimeter Bump in Sgr A* from Relativistic MHD Simulations
- Flaring Activity of Sgr A* at 43 and 22 GHz: Evidence for Expanding Hot Plasma
- Simulating the Emission and Outflows from Accretion Disks
- Time Dependent Models of Flares from Sagittarius A*
- Accretion-Ejection Instability, MHD Rossby Wave Instability, diskoseismology, and the high-frequency QPO of microquasars
- Simultaneous NIR/sub-mm observation of flare emission from SgrA*
- General Relativistic Flux Modulations from Disk Instabilities in Sagittarius A*
- Limits on the Position Wander of Sgr A*