Resources
Q & A
Glossary
Acronym Guide
Further Reading
Outside the Site
Google Sky
WWT
Facebook
Youtube
Vimeo
Twitter
Flickr
Pinterest
Multimedia, Etc
Images/Illustrations
Animation & Video
Special Features
Chandra Podcasts
Chandra Mobile
Desktop Images
The Big Chandra Picture
High Res Prints
Presentations
Handouts
Screen Savers
Audio
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
Q& A: Black Holes

Q:
Who is involved with the analysis of the black hole at the center of our galaxy? Who will be in charge of naming this object?

A:
Radio astronomers Bruce Balick and Robert Brown found a strong source of radio waves in the direction of the galactic center in the early 1970s. They called it Sagittarius A*, to distinguish it from a nearby source called Sagittarius A. In the early 1980's, a team led by Charles Townes of UC Berkely used infrared telescopes to obtain evidence for a 3 million solar mass black hole, from the motion of gas clouds. In the 1996, a team led by Reinhard Genzel of the Max Planck Institute in Garching, Germany used improved Infrared detectors on an optical telescope in Chile to strengthen the case, as did a group led by UCLA's Andrea Ghez. See
http://chandra.harvard.edu/press/00_releases/press_011400gc.html and Science 267, 65, and 68 and 85 (7 Jan 2000 issue), which can be found online at:
http://www.sciencemag.org/content/vol287/issue5450/

Back | Index | Next