Jason Dexter
JILA postdoctoral researcher Prasun Dhang, and JILA Fellows and University of Colorado Boulder Astrophysical and Planetary Sciences professors Mitch Begelman and Jason Dexter, turned to advanced computer simulations to model black holes surrounded by thin, highly magnetized accretion disks, to uncover the underlying physics that drives these enigmatic systems. Their findings, published in The Astrophysical Journal, offer crucial insights into the complex physics around black holes and could redefine how we understand their role in shaping galaxies.
JILA undergraduate student Aaron Barrios has recently been honored with the prestigious Jacob Van Ek Scholarship, an accolade conferred by the University of Colorado Boulder College of Arts and Sciences to a select group of exceptional undergraduates. This year, Barrios is among 23 distinguished students to receive one of the college's highest honors, reflecting his outstanding contributions and academic excellence in the fields of Physics, Astronomy, and Mathematics.
In a new paper in The Astrophysical Journal, JILA Fellow Jason Dexter, graduate student Kirk Long, and other collaborators compared two main theoretical models for emission data for a specific quasar, 3C 273. Using these theoretical models, astrophysicists like Dexter can better understand how these quasars form and change over time.
Two JILA graduate students were awarded this year's Richard Nelson Thomas Award for Graduate Students in Astrophyiscs. This award is given annually in honor of Dr. Richard Nelson Thomas, a founding member of JILA and an astrophysics researcher. Dr. Thomas was instrumental in establishing JILA's Visiting Fellows program, as well as growing the institution as a whole. Because of Dr. Thomas' legacy, his family and friends established an annual award given to an outstanding graduate student in astrophysics.
In 2019, a team of researchers used an international network of radio telescopes—called the Event Horizon Telescope—to take the first photo of a supermassive black hole in the center of the elliptical galaxy Messier 87 (M87). On that team of researchers was JILA Fellow Jason Dexter. Since then, Dexter has been studying M87's black hole further using simulations, with code written by researchers at the University of Illinois. As described in a new paper published in the Monthly Notices of the Royal Astronomical Society (MNRAS), Dexter, and his team of graduate students and postdoctoral researchers, collaborated with researchers at the Los Alamos National Laboratory and the University of Illinois to create a new simulation studying the edge of a black hole.
An international team of scientists, including a University of Colorado Boulder researcher, has taken the most detailed look yet at the supermassive black hole at the center of a galaxy called Messier 87. The results suggest the celestial object is surrounded by strong magnetic fields—key ingredients that could help generate galaxy-length jets of particles that shoot out around it.
In a team of over 300 scientists, JILA Fellow and assistant professor in theÌýDepartment of Astrophysical and Planetary Sciences, Jason Dexter digs further into the first picture ever taken of a black hole. His research has been recently published in a new paper for theÌýAstrophysical Journal Letters.
JILA Fellow Jason Dexter has been selected for a 2020 Sloan Fellowship.- Dexter is one of the 347 scientists who worked on the Event Horizon Telescope.