16 Carnegie Science | Fall 2018 ew work from an international team of astronomers including Carnegie postdoctoral fellow Jaehan Bae used archival radio telescope data to develop a new method for finding very young extrasolar planets. Of the thousands of exoplanets discovered by astronomers, only a handful are in their formative years. The new technique successfully confirmed the existence of two previously predicted Jupiter-mass planets around the star HD 163296. The Astrophysical Journal Letters published their work. SUPPORT: A grant from the NASA supported this research. The NASA High-End Computing Program, through the NASA Advanced Supercomputing Division at Ames Research Center Computing, provided resources. ALMA is a partnership of European Southern Observatory (ESO) (representing its member states), National Science Foundation (USA), and National Institutes of Natural Sciences (Japan), together with National Research Council (Canada), National Science Council of Taiwan and Academia Sinica Institute of Astronomy and Astrophysics (Taiwan), and Korea Astronomy and Space Science Institute (Korea), in cooperation with Chile. The Joint ALMA Observatory is operated by ESO, Associated Universities, Inc./ National Radio Astronomy Observatory (NRAO), and National Astronomical Observatory of Japan. The NRAO is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. Tilman Birnstiel acknowledges funding from the European Research Council (ERC) under the European Unions Horizon 2020 Research and Innovation program under grant agreement No. 714769. Young stars are surrounded by rotating disks of gas and dust, from which planets are formed. Finding more baby planets will help astronomers answer the many outstanding questions about planet formation, including the process by which our own Solar System evolved. The 60-odd radio telescope antennae of the Atacama Large Millimeter/submillimeter Array (ALMA) have been able to image these disks with never-before-seen clarity. The research team—including lead author Richard Teague and coauthor Edwin Bergin of the University of Michigan, Tilman Birnstiel of the Ludwig Maximilian University of Munich, and Daniel Foreman-Mackey of the Flatiron Institute— used archival ALMA data to demonstrate that anomalies in the velocity of the gas in these rotating protoplanetary disks can be used to indicate the presence of giant planets. New W a y To Find Baby Exoplanets N This is an artist’s impression of protoplanets forming around a young star. Image courtesy NRAO/AUI/NSF; S. Dagnello