UTSA-led team finds black hole affecting galactic climate
(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.
This spring UTSA is hosting a 30-second film festival on TikTok! Your mission? Create a 30-second video that highlights how you relax with Adobe Creative Cloud. This is your chance to take a break from the world around you make something fun. The top three videos will receive prizes that will help you on your creative journey and the top ten winners will receive free Adobe swag!Virtual Event
A lecture series brought to you by Loma de Vida Spa & Wellness and UTSA College for Health, Community and Policy. Dr. Sara Oswalt is the chair of & professor in the Department of Public Health at UTSA. She is also a certified sexuality educator through the American Association of Sexuality Educators, Counselors, & Therapists.Virtual Event
As part of the annual Campus Race to Zero Waste, the Office of Facilities will provide sensitive document shredding services for our UTSA community. You can bring work-related or personal documents. All we ask is for you to shred away to help recycle!Parking Lot UTSA Student Union and Ximenes Avenue Garade
In many courses, faculty broach relevant but difficult topics surrounding race, ethnicity, civil rights, and much more with sensitivity and caring—-but this may be especially difficult in an online classroom. In this session, Dr. Shelley Howell will discuss how faculty can create an inclusive classroom environment digitally to allow for conducive conversations for all parties.Virtual Event
Great discussions continue this spring with Mary McNaughton-Cassill, Professor of Psychology and Donna Edmondson, University Ombuds. They are providing five 30-minute interactive webinars. Topics include bridge building, stigmas, team building, staying engaged at work and our shared experiences.Virtual Event
The Black Student Union of UTSA presents a panel discussion on Black women in history and the impact of prominent Black women in the Roadrunner Community.Virtual Event
Join this workshop to explore how this instructor designed and delivered an exemplary course with an innovative design and a student-centered approach. This workshop is focused on the use of virtual labs and interactive content using interactive tools such as PlayPosit and Softchalk for an enhanced learning experience in large classes (more than 400 students).Virtual Event