Images by Date
Images by Category
Solar System
Stars
White Dwarfs
Supernovas
Neutron Stars
Black Holes
Milky Way Galaxy
Normal Galaxies
Quasars
Galaxy Clusters
Cosmology/Deep Field
Miscellaneous
Images by Interest
Space Scoop for Kids
Multiwavelength
Sky Map
Constellations
3D Wall
Photo Blog
Top Rated Images
Image Handouts
Desktops
High Res Prints
Fits Files
Image Tutorials
Photo Album Tutorial
False Color
Cosmic Distance
Look-Back Time
Scale & Distance
Angular Measurement
Images & Processing
AVM/Metadata
Getting Hard Copies
Image Use Policy
Web Shortcuts
Chandra Blog
RSS Feed
Chandra Mobile
Chronicle
Email Newsletter
News & Noteworthy
Image Use Policy
Questions & Answers
Glossary of Terms
Download Guide
Get Adobe Reader
More Information
Quasars & Active Galaxies
X-ray Astronomy Field Guide
Quasars & Active Galaxies
Questions and Answers
Quasars & Active Galaxies
Chandra Images
Quasars & Active Galaxies
Related Podcasts
Chandra's Archives Come to Life
Download Image

More Information
Handout
Handout: html | pdf

More Images
Chandra X-ray Image
of NGC 1068, Low Energy
(Credit: NASA/CXC/MIT/
UCSB/P.Ogle et al.)

More Releases
NGC 1068
NGC 1068
(03 Mar 10)

Related Images
NGC 5548
NGC 5548
(17 Feb 00)
NGC 4151
NGC 4151
(05 Jun 00)
NGC 1068:
Wind and Reflections from a Black Hole


NGC 1068
Credit: X-ray: NASA/CXC/MIT/UCSB/P.Ogle et al.; Optical: NASA/STScI/A.Capetti et al.

This composite X-ray (blue and green) and optical (red) image of the active galaxy, NGC 1068, shows gas blowing away in a high-speed wind from the vicinity of a central supermassive black hole. Regions of intense star formation in the inner spiral arms of the galaxy are highlighted by both optical and X-ray emission.

The elongated shape of the gas cloud is thought to be due to the funneling effect of a torus, or doughnut-shaped cloud, of cool gas and dust that surrounds the black hole. The torus, which appears as the elongated white spot in the accompanying 3-color X-ray images, has a mass of about 5 million Suns. Radio observations indicate that the torus extends from within a few light years of the black hole out to about 300 light years.

The X-rays observed from the torus are scattered and reflected X-rays that are probably coming from a hidden disk of hot gas formed as matter swirls very near the black hole. The torus is one source of the gas in the high-speed wind, but the hidden disk may also be involved. X-ray heating of gas further out in the galaxy contributes to the slower, outer parts of the wind.

Observations with the spectrometers aboard Chandra enable scientists to estimate the composition, temperature and flow velocity of the gas. They show that the composition of the material in the wind is roughly similar to that of the Sun's atmosphere, except for a deficit of oxygen atoms, and that it has a temperature of about 100,000 degrees Celsius (180,000 degrees Fahrenheit). The average gas speed is about 1 million miles per hour.

These Chandra data on NGC 1068 are consistent with a picture where the observer is looking along the edge of a torus of cool gas and dust around a supermassive black hole. In this case we see the indirect effects of the black hole, but do not get a direct view. In contrast, an observer looking down into the hole of the torus would see a brilliant black hole source (see NGC 5548, NGC 4151).

Fast Facts for NGC 1068:
Credit  X-ray: NASA/CXC/MIT/UCSB/P.Ogle et al.; Optical: NASA/STScI/A.Capetti et al.
Scale  Image is 36 arcsec on a side.
Category  Quasars & Active Galaxies
Coordinates (J2000)  RA 02h 42m 40.70s | Dec -00° 00' 47.60"
Constellation  Cetus
Observation Dates  December 04, 2000
Observation Time  13 hours
Obs. IDs  332
Color Code  Energy (X-ray: Green 0.4-0.8 keV, Blue 0.8-1.3 keV; Optical: Red)
Instrument  ACIS
Also Known As M77
References P. Ogle et al. 2003 Astronomy and Astrophysics, 402, 849
Distance Estimate  50 million light years
Release Date  July 09, 2003