University of Hawaii Instutute for Astronomy
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IfA Publications

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For immediate release
February 4, 2008


Dr. Lisa Kewley
Institute for Astronomy
University of Hawaii at Manoa

Prof. J. Patrick Henry
Institute for Astronomy
University of Hawaii at Manoa

Mrs. Karen Rehbock
Assistant to the Director
Institute for Astronomy
University of Hawaii at Manoa


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UH Astronomers Win American Astronomical Society Prizes

Lisa Kewley
Lisa Kewley
Photo by Karen Teramura.

Two University of Hawaii astronomers have been awarded prestigious prizes from the American Astronomical Society.

Dr. Lisa Kewley is the 2008 winner of the Newton Lacy Pierce Prize in Astronomy for her work that has shown how the properties of a galaxy depend on how long ago it was formed.

Prof. J. Patrick Henry is one of four scientists to receive the 2008 Rossi Prize for their pioneering work that used observations of X-rays to study clusters of galaxies and the dark matter they contain.

Kewley and Henry both make use of the fact that light from distant parts of the Universe can take billions of years to arrive at Earth. By pointing their telescopes at objects that are at different distances from Earth they can study how the average properties of galaxies and of clusters of galaxies have changed over the 14-billion-year life of the universe.

Kewley studies individual galaxies. Using telescopes on Mauna Kea and elsewhere, she discovered major differences between old and new galaxies in properties such as the rate at which new stars are formed, the concentration of oxygen, and the presence of a quasar-like nucleus.  As a by-product of her research, she calculated that most of the oxygen atoms we breathe were created between five and 12 billion years ago.

Born and raised in South Australia, Kewley received her PhD in 2002 from the Australian National University. She first came to the UH Institute for Astronomy in 2004 as a Hubble postdoctoral fellow, and in 2007 she became an assistant astronomer, the research equivalent of an assistant professor. In 2006, she won the Annie Jump Cannon Award, also given by the AAS.

Pat Henry  
J. Patrick Henry.
Photo by Karen Teramura.

Henry focuses his attention on galaxy clusters because they contain the largest known concentrations of dark matter—the mysterious invisible substance that makes up most of the mass of the universe. By studying galaxy clusters with X-ray telescopes in space and optical telescopes on Mauna Kea, he was able to determine how fast clusters of galaxies were being formed at different times in the past. From this he could deduce how much dark matter there is in the universe and how lumpy it is. The Rossi Prize recognizes Henry for being one of the first astronomers to do this type of research using X-rays and for improving the method.

Henry received his PhD from the University of California, Berkeley in 1974. While working at the Smithsonian Astrophysical Observatory in Cambridge, Mass. from 1974 to 1981, he developed the High Resolution Imager for the Einstein X-ray Observatory. He has been a professor at UH since 1981, and is known for his lively Astronomy 110 classes as well as his strong research program. Henry is also the recipient in 2003 of the Senior Research Award from the Humboldt Foundation of Germany.

"These awards show the overall strength of the Institute for Astronomy faculty, both senior faculty such as Pat Henry and younger faculty such as Lisa Kewley," said Rolf Kudritzki, director of the IfA.

The AAS awards the Pierce Prize annually for outstanding achievement in observational astronomy over the past five years to an astronomer who is under 36 years of age. The prize includes a $1,500 award.

The High Energy Astrophysics Division of the American Astronomical Society awards the Rossi Prize in recognition of significant contributions to the field of high-energy astrophysics. The prize is named in honor of Professor Bruno Rossi, an authority on cosmic ray physics and a pioneer in the field of X-ray astronomy. The prize includes a $1,500 award. The winners of the Rossi Prize will give a joint lecture at the 213th AAS meeting in January 2009 in Long Beach, Calif. The co-winners with Henry are Steven Allen (Stanford University and Stanford Linear Accelerator Center) and Maxim Markevitch and Alexey Viklinhin (Harvard-Smithsonian Center for Astrophysics, Cambridge, Mass.).

Chandra images
Three galaxies (Abell 2029, MS2137 and MS1137) imaged by the Chandra X-ray Observatory (seen as they were 1 billion, 3.5 billion, and 6.7 billion years ago, respectively) are among those that both Henry and Steven Allen used in their work. Credit: NASA/CXC/IoA/S.Allen et al.



1. Lisa Kewley. Photo by Karen Teramura.

2. J. Patrick Henry. Photo by Karen Teramura.

3.Three galaxies (Abell 2029, MS2137 and MS1137) imaged by the Chandra X-ray Observatory (seen as they were 1 billion, 3.5 billion, and 6.7 billion years ago, respectively) are among those that both Henry and Steve Allen used in their work. Credit: NASA/CXC/IoA/S.Allen et al. See

Founded in 1967, the Institute for Astronomy at the University of Hawaii at Manoa conducts research into galaxies, cosmology, stars, planets, and the sun. Its faculty and staff are also involved in astronomy education, deep space missions, and in the development and management of the observatories on Haleakala and Mauna Kea.

Established in 1907 and fully accredited by the Western Association of Schools and Colleges, the University of Hawaii is the state's sole public system of higher education. The UH System provides an array of undergraduate, graduate, and professional degrees and community programs on 10 campuses and through educational, training, and research centers across the state. UH enrolls more than 50,000 students from Hawaii, the U.S. mainland, and around the world.

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