THE FOLLOWING RELEASE WAS RECEIVED FROM THE UNIVERSITY OF MARYLAND,
BALTIMORE COUNTY (UMBC) IN BALTIMORE, MARYLAND AND IS FORWARDED FOR
YOUR INFORMATION. (FORWARDING DOES NOT IMPLY ENDORSEMENT BY THE AMERICAN
ASTRONOMICAL SOCIETY.) Steve Maran, American Astronomical Society
maran@aas.org 1-202-328-2010 x116

CONTACT:
Chip Rose
Office: 1-410-455-5793
Cell phone: 1-443-690-0307
crose@umbc.edu

UMBC Astronomer Helps Discover Possible New Black Hole

Previously Unknown Black Hole’s
Speed, Power Surprises NASA, European Space Agency Team

BALTIMORE -- An international team of astrophysicists including Volker
Beckmann of UMBC/NASA-Goddard has discovered a possible new black hole
near the center of the Milky Way galaxy.

The previously unknown black hole surprised scientists by suddenly
“switching on,” emitting strong pulses of radiation as it began consuming
gas from the star it orbits over 26,000 light years away from our solar
system. The discovery, detailed in a letter published in the journal
Astronomy & Astrophysics, was made using NASA and European Space Agency
(ESA) satellites.

In an ESA press release, Roland Walter, an astronomer at the ESA’s
INTEGRAL Science Data Center and lead author of the research results, said
"The galactic center is one of the most exciting regions for gamma ray
astronomy because there are so many potential gamma-ray sources.”

Beckmann, a research assistant professor at UMBC’s Joint Center for
Astrophysics and NASA’s Goddard Space Flight Center, was part of the team
who used NASA's Swift satellite and ESA's INTEGRAL satellite to spot the
tell-tale gamma-ray outburst. The research team includes scientists from
Switzerland, France, Belgium, Poland, the United States and Spain.

According to Beckmann, potential new black holes are scarcer than commonly
thought. “We know about 10 stellar systems in which we’re pretty sure that
there's a black hole involved, and 10 more are good candidates,” he said.
“What really surprised us was the intensity of the radiation it emitted
and how quickly it became an obvious black hole candidate.”

The team found that the black hole’s unusually strong gravitational pull
ripped off layers of the star it orbits, drawing them into its maelstrom.
“We’re not sure why this black hole is letting off occasional bright
outbursts of radiation instead of a steady stream,” said Beckmann, “But we
suspect these powerful emissions are caused by big chunks of the star’s
matter falling into the black hole.”

"This detection was possible because of the capability of NASA's Swift
satellite to respond quickly to new objects showing up in the sky,” said
Neil Gehrels, chief of NASA/Goddard’s Astroparticle Physics Laboratory and
leader of the Swift satellite team.

The possible new black hole has drawn the attention of the international
astronomy community, having been viewed by all major X-ray telescopes in
space including: NASA's Chandra telescope, the Japanese JAXA and NASA
collaboration Suzaku and the ESA's XMM-Newton X-ray satellite.