107 citations · 398 across the 18 of their papers we have counts for
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First mid-infrared detection and modeling of a flare from Sgr A*
Sebastiano D. von Fellenberg, Tamojeet Roychowdhury, Joseph M. Michail +24
The time-variable emission from the accretion flow of Sgr A*, the supermassive black hole at the Galactic Center, has long been examined in the radio-to-mm, near-infrared (NIR), an…
Multiwavelength Observations of Sgr A*. II. 2019 July 21 and 26
Joseph M. Michail, Farhad Yusef-Zadeh, Mark Wardle +6
We report on the final two days of a multiwavelength campaign of Sgr A* observing in the radio, submillimeter, infrared, and X-ray bands in July 2019. Sgr A* was remarkably active,…
Broadband Multi-wavelength Properties of M87 during the 2018 EHT Campaign including a Very High Energy Flaring Episode
J. C. Algaba, M. Balokovic, S. Chandra +738
The nearby elliptical galaxy M87 contains one of the only two supermassive black holes whose emission surrounding the event horizon has been imaged by the Event Horizon Telescope (…
Polarized signatures of adiabatically expanding hotspots in Sgr A*'s accretion flow
Joseph M. Michail, Farhad Yusef-Zadeh, Mark Wardle +1
We report 235 GHz linear and circular polarization (LP and CP) detections of Sgr A* at levels of and , respectively, using ALMA. We describe the first full-Sto…
Multi-wavelength Observations of Sgr A*. I. 2019 July 18
Joseph M. Michail, Mark Wardle, Farhad Yusef-Zadeh +1
We present and analyze ALMA submillimeter observations from a multi-wavelength campaign of Sgr A* during 18 July 2019. In addition to the submillimeter, we utilize concurrent mid-I…
Detection of a 20 minute time lag observed from Sgr A* between 8 and 10 GHz with the VLA
Joseph M. Michail, Farhad Yusef-Zadeh, Mark Wardle
We report the detection and analysis of a radio flare observed on 17 April 2014 from Sgr A* at GHz using the VLA in its A-array configuration. This is the first reported simult…
Evidence for a jet and outflow from Sgr A*: a continuum and spectral line study
F. Yusef-Zadeh, M. Royster, M. Wardle +4
We study the environment of Sgr A* using spectral and continuum observations with the ALMA and VLA. Our analysis of sub-arcsecond H30alpha, H39alpha, H52alpha and H56alpha line emi…