(Jan. 18, 2018) -- Chris Packham, associate professor of physics and astronomy at The University of Texas at San Antonio (UTSA), has collaborated on a new study that expands the scientific community’s understanding of black holes in our galaxy and the magnetic fields that surround them.
“Dr. Packham’s collaborative work on this study is a great example of the innovative research happening now in physics at UTSA. I’m excited to see what new research will result from these findings,” said George Perry, dean of the UTSA College of Sciences and Semmes Foundation Distinguished University Chair in Neurobiology.
Packham and astronomers lead from the University of Florida observed the magnetic field of a black hole within our own galaxy from multiple wavelengths for the first time. The results, which were a collective effort among several researchers, are deeply enlightening about some of the most mysterious objects in space.
A black hole is a place in space where gravity pulls so strongly that even light cannot escape its grasp. Black holes usually form when a massive star explodes and the remnant core collapses under the force of intense gravity. As an example, if a star around 3 times more massive than our own Sun became a black hole, it would be roughly the size of San Antonio. The black hole Packham and his collaborators featured in their study, which was recently published in Science, contains about 10 times the mass of our own sun and is known as V404 Cygni.
“The Earth, like many planets and stars, has a magnetic field that sprouts out of the North Pole, circles the planet and goes back into the South Pole. It exists because the Earth has a hot, liquid iron rich core,” said Packham. “That flow creates electric currents that create a magnetic field. A black hole has a magnetic field as it was created from the remnant of a star after the explosion.”
As matter is broken down around a black hole, jets of electrons are launched by the magnetic field from either pole of the black hole at almost the speed of light. Astronomers have long been flummoxed by these jets.
These new and unique observations of the jets and estimates of magnetic field of V404 Cygni involved studying the body at several different wavelengths. These tests allowed the group to gain a much clearer understanding of the strength of its magnetic field. They discovered that magnetic fields are much weaker than previously understood, a puzzling finding that calls into question previous models of black hole components. The research shows a deep need for continued studies on some of the most mysterious entities in space.
“We need to understand black holes in general,” Packham said. “If we go back to the very earliest point in our universe, just after the big bang, there seems to have always been a strong correlation between black holes and galaxies. It seems that the birth and evolution of black holes and galaxies, our cosmic island, are intimately linked. Our results are surprising and one that we’re still trying to puzzle out.”
Read the study Chris Packham collaborated on, “A precise measurement of the magnetic field in the corona of the black hole binary V404 Cygni.”
Learn more about the UTSA Department of Physics and Astronomy.
Through the month of February, the UTSA community is invited to join student organizations, colleges and departments at events that commemorate the African American people, places and events that have paved the way for racial equality.Various locations
Diploma Dash is a fast, certified 5k course for runners and a scenic route around Main Campus for walkers, strollers and dogs! There are individual and team prizes. Benefits UTSA students through the UTSA Alumni Association scholarship program.UTSA Main Campus
Enjoy music, food and socializing during this fundraising event benefiting the San Antonio Symphony League for the Youth Concert Series and the ITC for its ongoing educational mission.UTSA Institute of Texan Cultures, Hemisfair Campus
UTSA Libraries will host Robert Rico, M.P.A., Department of Criminal Justice, for his presentation "Restorative Justice: A Relational Approach to Civic Discourse." Pizza will be provided to students while supplies last.Buena Vista Street Building (BVB 2.309), Downtown Campus
Spend an evening stirring your curiosity during these monthly talks featuring some of UTSA’s most renowned faculty, and learn how the latest research in their fields applies to our daily lives. This month's speaker is Francine Romero, UTSA associate professor and associate dean of the College of Public Policy.The Historic Guadalupe Theatre, 1301 Guadalupe St., San Antonio
Meet with 60+ representatives from Texas and out-of-state schools to get information on becoming a competitive health professions applicant and information about the application and transition process.Student Union Denman Ballroom (SU 2.01.28), Main Campus
UTSA master's of fine arts student Lauren Riojas-Fitzpatrick showcases her thesis through an art exhibit.Terminal 136, 136 Blue Star, San Antonio
Hundreds of students, faculty, staff and alumni will roll up their sleeves to volunteer at nearly 20 service agencies throughout San Antonio.Convocation Center, Main Campus and service projects throughout San Antonio
The University of Texas at San Antonio is dedicated to the advancement of knowledge through research and discovery, teaching and learning, community engagement and public service. As an institution of access and excellence, UTSA embraces multicultural traditions and serves as a center for intellectual and creative resources as well as a catalyst for socioeconomic development and the commercialization of intellectual property - for Texas, the nation and the world.
To be a premier public research university, providing access to educational excellence and preparing citizen leaders for the global environment.
We encourage an environment of dialogue and discovery, where integrity, excellence, inclusiveness, respect, collaboration and innovation are fostered.