S0-2 star, G1- and G2-objects and flaring activity of the Milky Way's Galactic Center black hole in 2019
arXiv:2010.04234 · doi:10.3847/2041-8213/abeb70
Abstract
In 2019, the Galactic center black hole Sgr A* produced an unusually high number of bright near-infrared flares, including the brightest-ever detected flare (Do et al 2019, Gravity Collaboration 2020). We propose that this activity was triggered by the near simultaneous infall of material shed by G1 and G2 objects due to their interaction with the background accretion flow. We discuss mechanisms by which S-stars and G-objects shed material, and estimate both the quantity of material and the infall time to reach the black hole.
arXiv commentv1: 8 pages, 1 table. v2: 7 pages, 1 table. Abstract edited, section 3 and 4 are shortened, the table expanded, several comments and references added. Accepted to ApJL
References in corpus (24)
- On the Fate of Gas Accreting at a Low Rate onto a Black Hole
- The Galactic Center Massive Black Hole and Nuclear Star Cluster
- Detection of the gravitational redshift in the orbit of the star S2 near the Galactic centre massive black hole
- Nonthermal Electrons in Radiatively Inefficient Accretion Flow Models of Sagittarius A*
- Relativistic redshift of the star S0-2 orbiting the Galactic center supermassive black hole
- A powerful flare from Sgr A* confirms the synchrotron nature of the X-ray emission
- Variability Timescale and Spectral Index of Sgr A* in the Near Infrared: Approximate Bayesian Computation Analysis of the Variability of the Closest Supermassive Black Hole
- Time Dependent Models of Flares from Sagittarius A*
- The Galactic Center cloud G2 and its gas streamer
- On the nature of the fast moving star S2 in the Galactic Center
- Unprecedented variability of Sgr A* in NIR
- Near-infrared proper motions and spectroscopy of infrared excess sources at the Galactic Center
- The Fate of Binaries in the Galactic Center: The Mundane and the Exotic
- The Surprisingly Small Impact of Magnetic Fields On The Inner Accretion Flow of Sagittarius A* Fueled By Stellar Winds
- A population of dust-enshrouded objects orbiting the Galactic black hole
- Galactic Center Research: Manifestations of the Central Black Hole
- A Cool Accretion Disk around the Galactic Centre Black Hole
- The Flux Distribution of Sgr A*
- The Galactic Center Weather Forecast
- Direct Feeding of the Black Hole at the Galactic Center with Radial Gas Streams from Close-In Stellar Winds
- The Post-Periapse Evolution of Galactic Center Source G1: The second case of a resolved tidal interaction with a supermassive black hole
- An Inverse Compton Scattering Origin of X-ray Flares from Sgr A*
- Location of the bow shock ahead of cloud G2 at the Galactic Center
- Hydrodynamic Shielding and the Survival of Cold Streams