Matias Zaldarriaga is an Argentine

Argentina

Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

 cosmologist. Born in Coghlan neighbourhood

Coghlan, Buenos Aires

Coghlan is a barrio , of the city of Buenos Aires, Argentina.It is the name of a middle class neighbourhood located between Belgrano, Saavedra, Núñez and Villa Urquiza; it was originally inhabited by Irish and English immigrants....

, Buenos Aires

Buenos Aires

Buenos Aires is the capital and largest city of Argentina, and the second-largest metropolitan area in South America, after São Paulo. It is located on the western shore of the estuary of the Río de la Plata, on the southeastern coast of the South American continent...

, at the present time he works in the Institute for Advanced Study

Institute for Advanced Study

The Institute for Advanced Study, located in Princeton, New Jersey, United States, is an independent postgraduate center for theoretical research and intellectual inquiry. It was founded in 1930 by Abraham Flexner...

 located in Princeton, New Jersey, United States. He is known especially for his work on the cosmic microwave background (CMB). Together with Uros Seljak

Uroš Seljak

Uros Seljak is a Slovenian cosmologist, a professor of physics at University of California, Berkeley and University of Zurich...

, he developed the CMBFAST

CMBFAST

In physical cosmology, CMBFAST is a computer code, written by Uros Seljak and Matias Zaldarriaga, for computing the anisotropy of the cosmic microwave background...

 code, the first computationally efficient method for computing the anisotropy of the CMB for an arbitrary set of cosmological parameters. In 2003, he was awarded the Helen B. Warner Prize for Astronomy

Helen B. Warner Prize for Astronomy

The Helen B. Warner Prize for Astronomy is awarded annually by the American Astronomical Society to a young astronomer for a significant contribution to observational or theoretical astronomy....

 by the
American Astronomical Society

American Astronomical Society

The American Astronomical Society is an American society of professional astronomers and other interested individuals, headquartered in Washington, DC...

, and in 2005 he won the Gribov Medal of the European Physical Society

European Physical Society

The European Physical Society is a non-profit organization whose purpose is to promote physics and physicists in Europe. Formally established in 1968, its membership includes the national physical societies of 41 countries, and some 3200 individual members. The Deutsche Physikalische Gesellschaft,...

. In
2006, he was the recipient of a MacArthur Fellowship

MacArthur Fellows Program

The MacArthur Fellows Program or MacArthur Fellowship is an award given by the John D. and Catherine T...

.