The Flare Activity of SgrA*; New Coordinated mm to X-Ray Observations

TL;DR

This study presents simultaneous multi-wavelength observations of SgrA* to understand its variable emission, revealing one X-ray flare and five infrared events, providing insights into the physical processes near the Galactic Center's black hole.

Contribution

First coordinated mm to X-ray observations of SgrA* that capture multiple flare events, advancing understanding of its emission mechanisms.

Findings

Detected one X-ray flare event.

Observed five infrared flare events.

Provided multi-wavelength data on SgrA* activity.

Abstract

We report new simultaneous near-infrared/sub-millimeter/X-ray observations of the SgrA* counterpart associated with the massive 3-4x10**6 solar mass black hole at the Galactic Center. The main aim is to investigate the physical processes responsible for the variable emission from SgrA*. The observations have been carried out using the NACO adaptive optics (AO) instrument at the European Southern Observatory's Very Large Telescope and the ACIS-I instrument aboard the Chandra X-ray Observatory as well as the Submillimeter Array SMA on Mauna Kea, Hawaii, and the Very Large Array in New Mexico. We detected one moderately bright flare event in the X-ray domain and 5 events at infrared wavelengths.