activity
20112022
most citedAn Improved Distance and Mass Estimate for Sgr A* from a Multistar Orbit Analysis

288 citations · 785 across the 12 of their papers we have counts for

collaborators

12 papers

astro-ph.IM2022★ 4 cited

AIROPA II: Modeling Instrumental Aberrations for Off-Axis Point Spread Functions in Adaptive Optics

Anna Ciurlo, Paolo Turri, Gunther Witzel +12

Images obtained with single-conjugate adaptive optics (AO) show spatial variation of the point spread function (PSF) due to both atmospheric anisoplanatism and instrumental aberrat…

astro-ph.GA2020★ 77 cited

A population of dust-enshrouded objects orbiting the Galactic black hole

Anna Ciurlo, Randall D. Campbell, Mark R. Morris +9

The central 0.1 parsecs of the Milky Way host a supermassive black hole identified with the position of the radio and infrared source Sagittarius A*, a cluster of young, massive st…

astro-ph.GA2019★ 18 cited

Consistency of the Infrared Variability of Sgr A* over 22 years

Zhuo Chen, E. Gallego-Cano, T. Do +14

We report new infrared measurements of the supermassive black hole at the Galactic Center, Sgr A*, over a decade that was previously inaccessible at these wavelengths. This enables…

astro-ph.GA2017★ 40 cited

The Post-Periapse Evolution of Galactic Center Source G1: The second case of a resolved tidal interaction with a supermassive black hole

Gunther Witzel, Breann. N. Sitarski, Andrea M. Ghez +13

We present new Adaptive Optics (AO) imaging and spectroscopic measurements of Galactic Center source G1 from W. M. Keck Observatory. Our goal is to understand its nature and relati…

astro-ph.GA2016

Constraining the Variability and Binary Fraction of Galactic Center Young Stars

Abhimat K. Gautam, Tuan Do, Andrea M. Ghez +6

We present constraints on the variability and binarity of young stars in the central 10 arcseconds (~0.4 pc) of the Milky Way Galactic Center (GC) using Keck Adaptive Optics data o…

astro-ph.GA2016★ 1 cited

The late-type stellar density profile in the Galactic Center: A statistical approach

Samantha N. Chappell, Andrea M. Ghez, Tuan Do +5

The late-type stellar population in the Galactic Center was first predicted to reside in a dynamically relaxed cusp (power law slope ranging from 3/2 to 7/4). However, observations…