Spacetime & Spectra: Joint Chandra/JWST/EHT Observations of Sgr A*
Abstract
In 2022, the EHT released the first image of the Milky Way's massive black hole, Sgr A*. Coordinated Chandra observations placed crucial constraints on its energy budget, inclination, and spin. Sgr A* is one of only two EHT sources for which the imaging quality can resolve the BH shadow and provide a close-up view of accreting plasma near the horizon. It is variable on short time scales (min to hrs) and exhibits high contrast X-ray and infrared outbursts (flares), which may be linked to hotspots orbiting near the horizon. We propose joint Chandra and JWST observations of Sgr A* during the 2024 EHT campaign to characterize the BH's variable, multi-wavelength SED, to search for orbiting hotspots during flares, to seek Sgr A*'s missing jet, and to aide priors for EHT image reconstruction.
- Publication:
-
JWST Proposal. Cycle 2
- Pub Date:
- August 2023
- Bibcode:
- 2023jwst.prop.4572H