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Simultaneous X-ray and Infrared Observations of Sagittarius A*'s Variability
H. Boyce, D. Haggard, G. Witzel +11
Emission from Sgr A* is highly variable at both X-ray and infrared (IR) wavelengths. Observations over the last ~20 years have revealed X-ray flares that rise above a quiescent the…
An Adaptive Optics Survey of Stellar Variability at the Galactic Center
Abhimat Krishna Gautam., Tuan Do, Andrea M. Ghez +9
We present a year adaptive optics (AO) study of stellar variability and search for eclipsing binaries in the central pc () of the Milky Way nuc…
Improving Orbit Estimates for Incomplete Orbits with a New Approach to Priors -- with Applications from Black Holes to Planets
K. Kosmo O'Neil, G. D. Martinez, A. Hees +9
We propose a new approach to Bayesian prior probability distributions (priors) that can improve orbital solutions for low-phase-coverage orbits, where data cover less than approxim…
Multiwavelength Light Curves of Two Remarkable Sagittarius A* Flares
G. G. Fazio, J. L. Hora, G. Witzel +13
Sgr A*, the supermassive black hole (SMBH) at the center of our Milky Way Galaxy, is known to be a variable source of X-ray, near-infrared (NIR), and submillimeter (submm) radiatio…
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
G. Witzel, G. Martinez, J. Hora +16
Sagittarius A* (Sgr A*) is the variable radio, near-infrared (NIR), and X-ray source associated with accretion onto the Galactic center black hole. We present an analysis of the mo…
Off-axis point spread function characterisation in laser-guide star adaptive optics systems
O. Beltramo-Martin, C. M. Correia, E. Mieda +5
Adaptive optics (AO) restore the angular resolution of ground-based telescopes, but at the cost of delivering a time- and space-varying point spread function (PSF) with a complex s…
Confusing binaries: the role of stellar binaries in biasing disk properties in the Galactic Center
Smadar Naoz, Andrea M. Ghez, Aurelien Hees +3
The population of young stars near the Supermassive black hole (SMBH) in the Galactic Center (GC) has presented an unexpected challenge to theories of star formation. Kinematics me…