Tucked away in a star-forming region in the Taurus constellation, a pair of circling stars are displaying some unexpected differences in the circumstellar disks of dust and gas that surround them. A new study led by researchers at Lowell Observatory, combining data from the Atacama Large Millimeter/submillimeter Array (ALMA) and Keck Observatory, has unveiled intriguing findings about planet formation in this binary star system, known as DF Tau, along with other systems in this region.
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Astronomers Catch Unprecedented Features at Brink of Active Black Hole
International teams of astronomers monitoring a supermassive black hole in the heart of a distant galaxy have detected features never seen before using data from NASA missions and other facilities including the National Science Foundation (NSF) National Radio Astronomy Observatory (NSF NRAO) Very Long Baseline Array (VLBA). The features include the launch of a plasma jet moving at nearly one-third the speed of light and unusual, rapid X-ray fluctuations likely arising from near the very edge of the black hole.
Ken Kellermann Awarded the 2024 Karl G. Jansky Lectureship
Credit: NRAO/AUI/NSF
Associated Universities, Inc. (AUI) and the U.S. National Science Foundation National Radio Astronomy Observatory (NSF NRAO) have awarded the 2024 Karl G. Jansky Lectureship to Dr. Ken Kellermann, Senior Scientist, Emeritus at NSF NRAO. The Jansky Lectureship is an honor established by the trustees of AUI to recognize outstanding contributions to the advancement of radio astronomy.
After earning his Ph.D. in physics and astronomy at the California Institute of Technology in 1963, Dr. Kellermann did postdoctoral work at the Commonwealth Scientific and Industrial Research Organization (CSIRO), using the new Parkes radio telescope to observe planetary thermal emissions. He joined the National Radio Astronomy Observatory in 1965, where he has remained ever since studying extragalactic radio sources. Dr. Kellermann was one of the leading researchers in the development of Very Long Baseline Interferometry (VLBI). His work has allowed astronomers to view the radio sky in unprecedented detail and forms the basis of modern high-resolution radio astronomy. He was awarded the Helen B. Warner Prize for Astronomy in 1971 and the Catherine Wolfe Bruce Gold Medal in 2014. Together with Ellen N. Bouton he is the author of “Star Noise: Discovering the Radio Universe,” published by Cambridge University Press.
Dr. Kellermann will deliver his Jansky Lecture, entitled “Discovering the Radio Universe” in Charlottesville, VA on October 24; at the U.S. National Science Foundation Green Bank Observatory (NSF GBO) in Green Bank, WV on November 6; and in Socorro, NM on November 26. Learn more about these event times and locations.
First awarded in 1966, the Jansky Lectureship is named in honor of the man who, in 1932, first detected radio waves from a cosmic source. Karl Jansky’s discovery of radio waves from the central region of the Milky Way started the science of radio astronomy, which has changed our understanding of the Universe.
Other recipients of the Jansky award include eight Nobel laureates (Drs. Subrahmanyan Chandrasekhar, Edward Purcell, Charles Townes, Arno Penzias, Robert Wilson, William Fowler, Joseph Taylor, and Reinhard Genzel) as well as Jocelyn Bell-Burnell, discoverer of the first pulsar.
See a list of past recipients.
The National Radio Astronomy Observatory and the Green Bank Observatory are facilities of the National Science Foundation, operated under cooperative agreement by Associated Universities, Inc.
This news article was originally published on the NRAO website on October 11, 2024.
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Double the Disks, Double the Discovery: New Insights into Planet Formation in DF Tau
Tucked away in a star-forming region in the Taurus constellation, a pair of circling stars are displaying some unexpected differences in the circumstellar disks of dust and gas that surround them. A new study led by researchers at Lowell Observatory, combining data from the Atacama Large Millimeter/submillimeter Array (ALMA) and Keck Observatory, has unveiled intriguing findings about planet formation in this binary star system, known as DF Tau, along with other systems in this region.
Young Stars in the Milky Way’s Backyard Challenge Our Understanding of How They Form
Astronomers have made groundbreaking discoveries about young star formation in the Large Magellanic Cloud (LMC), using the James Webb Space Telescope (JWST), along with observations from the Atacama Large Millimeter/submillimeter Array (ALMA). The study, published in The Astrophysical Journal, gives new insight into the early stages of massive star formation outside our galaxy.
Astronomers Catch Unprecedented Features at Brink of Active Black Hole
International teams of astronomers monitoring a supermassive black hole in the heart of a distant galaxy have detected features never seen before using data from NASA missions and other facilities including the National Science Foundation (NSF) National Radio Astronomy Observatory (NSF NRAO) Very Long Baseline Array (VLBA). The features include the launch of a plasma jet moving at nearly one-third the speed of light and unusual, rapid X-ray fluctuations likely arising from near the very edge of the black hole.