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- EMBARGOED UNTIL 3:30 p.m. MST, January 11, 1995
-
- HUBBLE CAPTURES MERGER BETWEEN QUASAR AND GALAXY
-
- This NASA Hubble Space Telescope image shows evidence fo r a merger
- between a quasar and a companion galaxy. This surprising result might
- require theorists to rethink their explanations for the nature of
- quasars, the most energetic objects in the universe.
-
- The bright central object is the quasar itself, located several billion
- light-years away. The two wisps on the (left) of the bright central
- object are remnants of a bright galaxy that have been disrupted by
- the mutual gravitational attraction between the quasar and the
- companion galaxy. This provides clear evidence for a merger between
- the two objects.
-
- Since their discovery in 1963, quasars (quasi-stellar objects) have
- been enigmatic because they emit prodigious amounts of energy from a
- very compact source. The most widely accepted model is that a quasar
- is powered by a supermassive black hole in the core of a galaxy.
-
- These new observations proved a challenge for theorists as no current
- models predict the complex quasar interactions unveiled by Hubble.
-
- The image was taken with the Wide Field Planetary Camera-2.
-
- Credit: John Bahcall, Institute for Advanced Study, NASA.
-
- Note: The image is available through the Space Telescope home page on
- the World Wide Web, (url http://www.stsci.edu) or by request, a hard
- copy will be expressed to your office.
-
- Space Telescope Science Institute
- 3700 San Martin Drive
- Baltimore, MD 21218
- 410-338-4562
-
-