An overview of the Chandra mission and goals, Chandra's namesake, top 10 facts.
Classroom activities, printable materials, interactive games & more.
Overview of X-ray Astronomy and X-ray sources: black holes to galaxy clusters.
All Chandra images released to the public listed by date & by category
Current Chandra press releases, status reports, interviews & biographies.
A collection of multimedia, illustrations & animations, a glossary, FAQ & more.
A collection of illustrations, animations and video.
Chandra discoveries in an audio/video format.
Q&A: Galaxies, Galaxy Clusters, AGN, and Quasars

Q:
Where can I access details about the new discovery Q2345+007? I wonder about the flux or magnitude and peaks in the spectrums of both quasars. Can you determine if they are gravitationally bound?

A:
The paper is posted on the following web site: http://xxx.lanl.gov/abs/astro-ph/0202081 In the discussion section of this paper, the authors say that the quasars are about 200,000 light years apart. There is no observational evidence that the quasars are gravitationally bound, but their close proximity is consistent with models for collisions between galaxies in which they become bound and eventually merge to form a more massive black hole a period of several hundred million years.

Back | Index | Next