Astrophysicist simulating and imaging Black Holes with the Event Horizon Telescope. Black holes, accretion disks & jets, MHD simulations, computational imaging, and other topics.

achael@princeton.edu

465 Jadwin Hall
Princeton University
Princeton, NJ 08540

Thesis Talk

  • “Simulating and imaging supermassive black hole accretion flows.’’
    Cambridge, MA. April 30, 2019.
    video | slides

Invited Talks

2023

  • “Polarization spirals, energy extraction, and black hole spin.”
    Princeton-IAS Bahcall Lunch. Princeton, NJ. May 2023.
    slides

  • “The black hole-jet connection in simulations of M87.”
    Hamilton Workshop on Kinetic Models of Relativistic Plasmas. Dublin, Ireland. February 2023.
    slides

  • “Horizon-scale images of black hole accretion and jet launching.”
    Duke University Physics Colloquium. Durham, NC. February 2023.
    slides

  • “Horizon-scale images of black hole accretion and jet launching.”
    UC Berkeley Astronomy Colloquium. Berkeley, CA. February 2023.
    slides

2022

  • “Imaging supermassive black holes with the Event Horizon Telescope.”
    Bard College Physics Colloquium. Annandale-on-Hudson, NY. November 2022.
    slides

  • “Multifrequency imaging for the ngEHT.”
    Broadening Horizons Workshop. Cambridge, MA. August 2022.
    slides

  • “Supermassive black holes and relativistic jets: insights from simulations and EHT observations.”
    IAU Focus Meeting 1. Busan, Korea. August 2022.
    slides

  • “Polarization with the Event Horizon Telescope.”
    EHT Summer Collaboration Meeting. Granada, Spain. June 2022.

2021

  • “Dynamic Imaging and Modeling of Sgr A*.”
    EHT US Focus Meeting. Tucson, AZ. November 2021.

  • “Imaging supermassive black hole accretion flows: magnetic fields, jets, and inner shadows.”
    Princeton Gravity Initiative Seminar. Princeton, NJ. September 2021.
    slides

  • “Observing the inner shadow of a black hole.”
    Goethe University Frankfurt Astronomy Seminar. Virtual. July 2021.
    slides

  • “Magnetic fields at the event horizon in M87.”
    PCTS Seminar. Virtual. April 2021.
    slides

  • “Magnetic fields at a supermassive black hole’s event horizon.”
    CU Boulder Astronomy Colloquium. Virtual. April 2021.
    slides

  • “Horizon-scale polarization and magnetic fields in M87* from the EHT.”
    Princeton-IAS Bahcall Lunch. Virtual. March 2021.
    slides

  • “ngEHT insights from radiative simulations: jets and lensed horizons.”
    ngEHT Science Meeting. Virtual. February 2021.
    slides

2020

  • “Photographing a black hole with the Event Horizon Telescope.”
    SciPy 2020 Keynote. Virtual. July 2020.
    video | slides

  • “Towards understanding black hole accretion and jet launching.”
    APS April Meeting. Virtual. April 2020.
    slides

  • “VLBI imaging techniques.”
    University of Arizona BH PIRE Webinar. Virtual. March 2020.
    slides

  • “Photographing a black hole with the Event Horizon Telescope”
    NMSU College of Engineering Distinguished Lecture Series. Las Cruces, NM. February 2020.
    slides

2019

  • “The black hole and jet in M87: connecting simulations and VLBI Images.”
    Princeton Gravity Group Seminar. Princeton, NJ. November 2019.
    slides

  • “The black hole and jet in M87: connecting simulations and VLBI Images.”
    Caltech TAPIR Seminar. Pasadena, CA. November 2019.
    slides

  • “The black hole and jet in M87: connecting simulations and VLBI Images.”
    NHFP Conference 2019. Washington, DC. October 2019.
    slides

  • “The black hole and jet in M87: connecting simulations and VLBI Images.”
    University of Waterloo Astronomy Seminar. Waterloo, ON. October 2019.
    slides

  • “Photographing a black hole with the Event Horizon Telescope.”
    Carleton College Special Lecture. Northfield, MN. May 2019.
    slides

  • “In the shadow of the black hole.”
    GitHub Satellite 2019. Berlin, Germany. May 2019.
    video

  • “Reconstructing an image of the black hole in M87 from EHT Data.”
    Black Hole Initiative Conference. Cambridge, MA. May 2019.
    slides

  • “Simulating and imaging supermassive black hole accretion flows.”
    Black Hole Initiative Colloquium. Cambridge, MA. May 2019.
    slides

  • “Two-temperature, radiative, MAD simulations of the supermassive black hole in M87.”
    ITC lunch (Keto Prize Talk). Cambridge, MA. May 2019.
    slides | video

  • “Photographing black holes: first results from the Event Horizon Telescope.”
    Harvard University, Special Colloquium. Cambridge, MA. April 2019.
    video

2018

  • “What will the Event Horizon Telescope see?”
    Columbia Astronomy Thursday Seminar. New York, NY. November 2018.
    slides

  • “Electron heating and particle acceleration in GRMHD simulations.”
    The Central Arcsecond: Towards Testing General Relativity in the Galactic Center. Ringberg, Bavaria. November 2018.
    slides

  • “What will the EHT see? Electron heating in simulations of Sgr A* and M87.”
    Northwestern CIERA Theory Group Meeting. Evanston, IL. October 2018.
    slides

  • “Imaging a black hole with the Event Horizon Telescope.”
    907th Amateur Telescope Makers of Boston Meeting. Cambridge, MA. March 2018.
    slides

2016

  • “Imaging techniques for the Event Horizon Telescope.”
    3rd Event Horizon Telescope Collaboration Meeting. Cambridge, MA. December 2016.
    slides

2014

  • “Probing dynamical activity near the Event Horizon with the EHT.”
    2nd Event Horizon Telescope Collaboration Meeting. Waterloo, ON. November 2014.
    abstract

Other Contributed Talks

  • “EHT observations, theoretical models, and results”
    Princeton Workshop on Black Hole Accretion Models. Princeton, NJ. February 2023.
    slides

  • “Polarization, energy extraction, and spin in EHT images.”
    EHT Summer Collaboration Meeting. Taichung, Taiwan. June 2023.

  • “Hybrid GRMHD and force-free simulations.”
    EHT Summer Collaboration Meeting. Granada, Spain. June 2022

  • “The inner shadow of a supermassive black hole.”
    AAS 240. Pasadena, CA. June 2022.
    slides

  • “The inner shadow of the black hole in M87.”
    16th Marcel Grossman Meeting. Virtual. July 2021.
    slides

  • “Simulating and imaging black hole accretion flsows.”
    AAS 235. Honolulu, HI. January 2020.
    slides

  • “The black hole and jet in M87: connecting simulations and EHT Images.”
    JSI Workshop 2019. Annapolis, MD. November 2019.
    slides

  • “Electron heating physics in images and variability of Sgr A*.”
    15th Marcel Grossman Meeting. Rome, Italy. July 2018.
    slides

  • “The role of electron heating physics in images and variability of Sgr A*.”
    28th New England Regional Quasar and AGN Meeting. New Haven, CT. May 2018.
    slides

  • “Evolving thermal and nonthermal electron distributions in simulations of Sagittarius A*.”
    AAS 231. Washington, DC. January 2018.
    slides

  • “Evolving thermal and nonthermal electron distributions in accretion simulations.”
    13th School of Modern Astrophysics. Moscow, Russia. July 2017.
    slides

  • “Evolving thermal and nonthermal electron distributions in accretion simulations.”
    When Brandeis met Jansky: Astrophysics and Beyond. Waltham, MA. May 2017.
    abstract

  • “Imaging black hole magnetic fields with the Event Horizon Telescope.”
    M87 Workshop. Taipei, Taiwan. May 2016.
    slides