(Jan. 5, 2016) -- A team of researchers led by Eric Schlegel, Vaughan Family Endowed Professor in Physics at The University of Texas at San Antonio (UTSA), has discovered a powerful galactic blast produced by a giant black hole about 26 million light years from Earth. The black hole is the nearest supermassive black hole to Earth that is currently undergoing such violent outbursts.
Schlegel’s team used NASA’s Earth-orbiting Chandra X-ray Observatory to find the black hole blast in the famous Messier 51 system of galaxies. The system contains a large spiral galaxy, NGC 5194, colliding with a smaller companion galaxy, NGC 5195.
“Just as powerful storms here on Earth impact their environments, so too do the ones we see out in space,” Schlegel said. “This black hole is blasting hot gas and particles into its surroundings that must play an important role in the evolution of the galaxy.”
Schlegel and his colleagues, including Fisk University graduate student and UTSA alumna Laura Vega ’14, detected two X-ray emission arcs close to the center of NGC 5195, where the supermassive black hole is located.
“We think these arcs represent artifacts from two enormous gusts when the black hole expelled material outward into the galaxy,” said co-author Christine Jones, astrophysicist and lecturer at the Harvard-Smithsonian Center for Astrophysics (CfA). “We think this activity has had a big effect on the galactic landscape.”
Just beyond the outer arc, the researchers detected a slender region of hydrogen gas emission, suggesting that X-ray emitting gas displaced the hydrogen gas from the center of the galaxy.
Moreover, the properties of the gas around the arcs suggest that the outer arc has swept up enough material to trigger the formation of new stars. This type of phenomenon, where a black hole affects its host galaxy, is called “feedback.”
“We think that feedback keeps galaxies from becoming too large,” said co-author Marie Machacek, astrophysicist at CfA. “But at the same time, it can be responsible for how some stars form, showing that black holes can be creative, not just destructive.”
The astronomers believe the black hole’s outbursts may have been triggered by the interaction of NGC 5195 with its larger companion, NGC 5194, causing gas to be funneled toward the black hole. The team estimates that it took about one to three million years for the inner arc to reach its current position, and three to six million years for the outer arc.
“The black hole’s behavior may be a local example of events that commonly took place when the universe was much younger. That makes this observation potentially very important,” Schlegel said.
The researchers presented their findings today at the 227th meeting of the American Astronomical Society meeting in Kissimmee, Fla. They have also described their work in a paper submitted to The Astrophysical Journal.
NASA's Marshall Space Flight Center in Huntsville, Alabama, manages the Chandra program for NASA's Science Mission Directorate in Washington. The Smithsonian Astrophysical Observatory in Cambridge, Massachusetts, controls Chandra's science and flight operations.
Learn more about the UTSA Department of Physics and Astronomy.
State Rep. Diego Bernal presents a Q&A panel discussion with MALDEF, RAICES and DMCA Immigration Law Firm about DACA and the current state of affairs for Dreamers. Opening remarks by Congressman Joaquin Castro and Congressman Lloyd Doggett.
Buena Vista Building, Aula Canaria Auditorium (BVB 1.328), Downtown Campus
Come out and enjoy breakfast and beverages at the Official UTSA Tailgate in Albuquerque as our Roadrunners take on the New Mexico Lobos at the Gildan New Mexico Bowl. The official UTSA tailgate will be located in Fan Fest in the University Stadium Parking Lot, Stadium East.
University Stadium parking lot, Albuquerque, NM
Graduates from the College of Architecture, Construction and Planning, College of Business, College of Education and Human Development and the College of Public Policy will participate in the first commencement ceremony. President Romo will deliver the keynote address.
Graduates from the College of Engineering, College of Liberal and Fine Arts, College of Sciences and University College will participate in the second commencement ceremony. President Romo will deliver the keynote address.
UTSA's Department of Music hosts Dr. David Huron from Ohio State University as part of the Donald Hodges lecture series. Huron is a Canadian arts and humanities distinguished professor at Ohio State University.
John Peace Library, UTSA Faculty Center, (JPL 4.04.22), Main Campus
The Student Center for Community Engagement and Inclusion annually hosts a Volunteer Opportunities Fair to allow students, faculty and staff to learn about volunteer and service-learning opportunities in the San Antonio area.
University Center, 1st floor corridor, Main Campus
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.