Paul Kalas

Paul Kalas
250px Paul Kalas in 2015, Cerro Pachon, Chile
Born	(1967-08-13) August 13, 1967 New York City
Citizenship	United States of America
Nationality	Greek American
Fields	Astronomy
Institutions	University of California, Berkeley
Alma mater	University of Hawaii University of Michigan, Ann Arbor
Doctoral advisor	David Jewitt
Known for	Exoplanet Research Fomalhaut, Fomalhaut b
Notable awards	Newcomb Cleveland Prize (2009)

Paul Kalas (born August 13, 1967) is a Greek American astronomer known for his discoveries of debris disks around stars. Kalas led a team of scientists to obtain the first visible-light images of an extrasolar planet with orbital motion around the star Fomalhaut, at a distance of 25 light years from Earth. The planet is referred to as Fomalhaut b.

Background

Kalas was born in New York to George and Maria Kavallinis, who immigrated to the United States from Heraklion, Crete. Kalas attended Detroit Country Day School in Michigan, and studied astronomy and physics at the University of Michigan, Ann Arbor. He earned a Ph.D. in Astronomy in 1996 from the University of Hawaii under the direction of astronomer David Jewitt.

Kalas worked as a postdoctoral scientist at the Max Planck Institute for Astronomy in Heidelberg, Germany, the Space Telescope Science Institute, and the University of California, Berkeley. In 2006, he became an Adjunct Professor of Astronomy at the University of California, Berkeley.

Kalas lives with his wife Aspasia Gkika and daughters Maria-Nikoleta and Natalia near Berkeley, California.

Discoveries

Kalas discovered several circumstellar disks using a coronagraph on the Hubble Space Telescope and at the University of Hawaii 2.2-meter telescope at Mauna Kea, Hawaii. In 1995 he discovered various forms of asymmetric structure in optical images of the Beta Pictoris disk. He was the lead scientist for the first optical images of debris disks surrounding the nearby red dwarf AU Microscopii and the bright star Fomalhaut.

Kalas' Hubble Space Telescope image of Fomalhaut revealed a narrow belt of dusty material analogous to our Solar System's Kuiper Belt. However, Kalas also found that Fomalhaut's belt is narrow and geometrically offset from the star by 15 astronomical units. These features are considered strong evidence for an extrasolar planet orbiting Fomalhaut that gravitationally sculpts the morphology of the belt.

Circumstellar disks discovered: 5

AU Microscopii	October 14, 2003
Fomalhaut	May 17, 2004
HD 15115	July 17, 2006
HD 53143	September 11, 2004
HD 139664	October 14, 2004

Honors

• Elected Fellow of the American Association for the Advancement of Science (2014)

• AIAA William H. Pickering Lecture (2010)

• Newcomb Cleveland Prize of the American Association for the Advancement of Science (2009)

External links

• The Circumstellar Disk Learning Site
• Kalas' homepage
• Sky & Telescope Article on Fomalhaut discovery
• Space.com article on AU Microscopii discovery
• New Scientist article on HD 53143 and HD 139664 discoveries

• http://astro.berkeley.edu/~kalas/