SLAC Today is available online at:

In this issue:
Study Sheds Light on Ancestry of Milky Way
Profile: SLAC Welcomes Aundra Richards
Tree Planting Ceremony to Remember R. Yeager

SLAC Today

Wednesday - November 22, 2006

Study Sheds Light on Ancestry of Milky Way

From its orbit around Earth, the Cosmic Background Explorer (COBE) captured this edge-on view of our Milky Way galaxy in infrared light. Image courtesy of NASA. (Click on image for larger version.)

Our Milky Way Galaxy and its nearby dwarf galaxies may be cosmological neighbors, but are they also relatives?

Conventional scientific wisdom says yes, with modern models suggesting that the Milky Way formed from the merger of thousands of dwarf galaxies like those that still surround our galaxy today. But now, a new study has cast doubt on this notion by demonstrating a difference between the chemical make-up of the Milky Way and its dwarf neighbors, a finding that suggests they are actually of different descent.

An international group of scientists from nine institutions used the Very Large Telescope in Chile to survey more than 2,000 giant stars in the nearby Fornax, Sculptor, Sextans and Carina dwarf galaxies. Using a spectrograph mounted on the telescope, the team measured the ratio of iron to hydrogen for each star and compared their observations to those from stars in the Milky Way's halo, or outer region.  Read more...

(Weekly Column - Profile)

SLAC Welcomes
Aundra Richards

(Photo - Aundra Richards)A warm welcome to Aundra Richards, SLAC's new Acting Site Manager. Richards is also the Manager for the Lawrence Berkeley National Laboratory (LBNL) Site Office, and will be at SLAC Monday through Thursday each week.

The Site Office provides field management of SLAC for the Office of Science. The Site Office reports directly to the Office of Science and provides an on-site presence for implementation of programs and projects, as well as institutional management of the DOE-Stanford University-SLAC Management and Operations Contract.

After earning a Bachelor of Arts and Masters of Arts in History from the University of Santa Clara in Santa Clara, California, Richards began her career with the U.S. DOE Oakland Operations Office in 1979 as an intern Contract Specialist in the Procurement Division. Over the years, she rose through the ranks and held the position of Director of Contracts when the office closed in 2004. Before joining LBNL as Site Manager, Aundra completed special assignment details for DOE Headquarters in the Office of Field Management, and with the National Nuclear Security Administration as Associate Administrator for Management and Administration.

Welcome, Aundra!

Tree Planting Ceremony to Remember R. Yeager

A Coastal Oak will be planted at SLAC next week to honor the memory of Rick Yeager.

Richard P. ("Rick") Yeager, SLAC's Security Manager in the Business Services Division for fourteen years, passed away in September after a courageous fight with cancer.

All of Yeager's friends and coworkers are invited to attend the dedication ceremony of a Coastal Oak tree and memorial plaque to honor his memory.

The event will take place on Wednesday, November 29th, at noon at the Sector 6 Picnic Area. Rick's wife, Kathy, and his daughter, Jeannie, will also attend.

For more information, please contact Doug Kreitz.

ILC Cryogenics

The proposed International Linear Collider will use 16,000 superconducting cavities made of niobium, and scientists around the world are working on the cryogenic system needed to keep the cavities cool.  Read more...

Events (see all | submit)

Access (see all)

(see all | submit)

 Lab Announcements

Community Bulletin Board

News (see all | submit)

dividing line
(Office of Science/U.S. DOE Logo)

View online at