Announcements 2004

3 Marzo 2004: The March 2004 edition of the Newsletter features news about the Adaptive Optics Development Program, progress reports from the Large Synoptic Survey Telescope and the AURA New Initiatives Office, and information on preparing observing proposals for 2004B.

25 Febrero 2004: A Canadian/Gemini team led by Tim Davidge (Herzberg Institute of Astrophysics) used the ALTAIR adaptive optics system with the Near Infrared Imager (NIRI) on the Frederick C. Gillett Gemini North Telescope to probe the red stellar content in the starburst galaxy M-82. The field studied is at a projected distance of 1 kiloparsec above the disk plane of the galaxy. This amorphous, nearly edge-on galaxy is the third brightest member of a nearby collection of galaxies called the M-81 group which is located about 12 million light-years from our Galaxy. The interactions of galaxies in the M-81 group spur bursts of star formation in its members and M-82 appears to now be experiencing such a violent outburst. This activity in the disk of M-82 appears to drive a bipolar galactic wind that feeds gas to the outer regions of the galaxy. This work indicates that recent star formation in M-82 …

2 Febrero 2004: Wide-field telescope observations from the CTIO Blanco 4-meter telescope of the remote and therefore early Universe, looking back to a time when it was a fifth of its present age (redshift = 2.38), have revealed an enormous string of galaxies about 300 million light-years long. This new structure defies current models of how the Universe evolved, which can’t explain how a string this big could have formed so early.

21 Enero 2004: Trailing 200,000-light-year-long streamers of seething gas, a galaxy that was once like our Milky Way is being shredded as it plunges at 4.5 million miles per hour through the heart of a distant cluster of galaxies. These findings use data from the Mayall 4-meter and Gemini Telescopes.

14 Enero 2004: The mirror for the SOAR 4-meter telescope arrived safely on Cerro Pachón in Chile on the afternoon of 9 January 2004 to the great excitement of the SOAR project team, who will now prepare the optics system for first light. Dedication of the telescope is planned for mid-April.

5 Enero 2004: Why are some galaxies brighter than others? Bright galaxies where stars are forming may outshine dimmer, more massive galaxies. In all previous surveys of the “Redshift Desert,” the brighter star-forming galaxies were the only type bright enough to be sampled. The Gemini Deep Deep Survey (GDDS) was able to sample the dimmer, more massive galaxies and provide a better representation of the galaxies at this epoch of the Universe. The GDDS results revealed that there is a greater abundance of these more massive and older galaxies than expected from current models when the Universe was only 20-40% of its current age.