Cover - GCNEWS, Vol. 17, March 2004


A Newsletter for Galactic Center Research
This Volume was edited by Sera Markoff, Loránt Sjouwerman, Joseph Lazio, Cornelia Lang & Rainer Schödel

Volume 17, March 2004 - Coverpage

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GCNEWS Vol. 17, March 2004
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Orbits of Stars in the Central 1.5 x 1.5 arcsec2

Figure 1 from Ghez's article: The central 1.5 arcsec x 1.5 arcsec of our Galaxy. In the background, an image of the stars taken in 2003 is displayed and, in the foreground, colored dots show the positions of some of these stars over almost a decade of time (multiple measurements are taken every year, but only the annual averages are shown here for clarity). Also plotted are the best fitting simultaneous orbital solutions. These orbits, and a simple application of Kepler's Laws, provide the best evidence yet for a supermassive black hole, which has a mass of 4 million times the mass of our Sun. Animated version of this can be found at (See Article by Andrea Ghez).
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Table of Contents

  1. In the News - Sera Markoff
    1. "In this volume"
    2. "GC Conference Cameos" - Sera Markoff & Joseph Lazio

  2. Invited Article: "On the Road Towards a Deeper Understanding of Sgr A* and its Environment", by Rainer Schödel, Reinhard Genzel, Fred Baganoff & Andreas Eckart
  3. Invited Article: "Recent Advances Made with a Decade of Diffraction-Limited Data From the W. M. Keck 10m Telescopes", by Andrea Ghez
  4. Abstracts of recently submitted papers
  5. Announcements
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