Extra X-rays at the Hub of our Milky Way Galaxy
April 29th, 2015
Credit: NASA/JPL-Caltech

NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR, has captured a new high-energy X-ray view (magenta) of the bustling center of our Milky Way galaxy. The smaller circle shows the area where the NuSTAR image was taken -- the very center of our galaxy, where a giant black hole resides. That region is enlarged to the right, in the larger circle, to show the NuSTAR data.

The NuSTAR picture is one of the most detailed ever taken of the center of our galaxy in high-energy X-rays. The X-ray light, normally invisible to our eyes, has been assigned the color magenta. The brightest point of light near the center of the X-ray picture is coming from a spinning dead star, known as a pulsar, which is near the giant black hole. While the pulsar's X-ray emissions were known before, scientists were surprised to find more high-energy X-rays than predicted in the surrounding regions, seen here as the elliptical haze.

Astronomers aren't sure what the sources of the extra X-rays are, but one possibility is a population of dead stars.

The background picture was captured in infrared light by NASA's Spitzer Space Telescope.

The NuSTAR image has an X-ray energy range of 20 to 40 kiloelectron volts.

Observation

About the Object

Name
Milky WayGalactic Center
Type
Star > Evolutionary Stage > Protostar
Nebula > Type > Interstellar Medium
Galaxy > Component > Center/Core
Distance
26,000 Light Years

Color Mapping

Band Wavelength Telescope
X-ray 30.0 keV NuSTAR
Infrared 3.6 µm Spitzer IRAC
Infrared 4.5 µm Spitzer IRAC
Infrared 8.0 µm Spitzer IRAC

Astrometrics

Position ()
RA = 17h 45m 37.2s
Dec = -28° 56' 10.2"
Field of View
0.0 x 0.0 arcminutes
Orientation
North is 58.6° left of vertical