NASA's Goddard Space Flight Center 6 Mar 2017, 16:58 UTC
Institute of Astronomy and Astrophysics, Academai Sinica
An Extraordinary Celestial Spiral with a TwistALMA adds a new dimension to a Hubble Space Telescope result4 Mar 2017, 07:22 UTC
NASA's Ames Research Center News and Features 3 Mar 2017, 21:55 UTC
NASA's Goddard Space Flight Center 3 Mar 2017, 18:00 UTC
NASA's Goddard Space Flight Center 3 Mar 2017, 15:04 UTC
ALMA NAOJ 3 Mar 2017, 01:09 UTC An international team of astronomers, led by Hyosun Kim in Academia Sinica Institute of Astronomy and Astrophysics (ASIAA, Taiwan), has found a way of deriving the orbital shape of binary stars that have orbital periods too long to be directly measured. This was possible thanks to an observation toward the old star LL Pegasi (also known as AFGL 3068) using the state-of-the-art telescope, the Atacama Large Millimeter/submillimeter Array (ALMA). This work appears in the journal Nature Astronomy this week, and is selected as the cover story of the March issue. Image 1. The composite image of molecular gas around an old star LL Pegasi. Credit: ALMA(ESO/NAOJ/NRAO), Hyosun Kim et al. "It's really exciting to see such a beautiful spiral-shell pattern in the sky. Our observations of LL Pegasi binary system have revealed the delicately ordered three-dimensional geometry of this spiral-shell pattern, and we have produced a very satisfying theory to account for its details," says Hyosun Kim. The new ALMA images reveal the detailed features of spiral-shell pattern imprinted in the gas material continuously ejected from LL Pegasi. A comparison of this observation with computer simulations led the team, for the first time, to the conclusion that a highly elliptical ...
MIT 2 Mar 2017, 23:55 UTC This week, the Hydrogen Epoch of Reionization Array (HERA) telescope project team was awarded a grant from the Gordon and Betty Moore Foundation to MIT to expand the HERA telescope in South Africa to begin looking for the effects of light from the first generation of stars that formed in the universe. HERA, an international project led by researchers at the University of California at Berkeley, with initial funding from the National Science Foundation (NSF), is looking for signals from the “epoch of reionization” (EoR) when 90 percent of the hydrogen atoms created in the early universe were destroyed by the first luminous stars and black holes. The enhancement of the array, supported by the additional funding and carried out in partnership with MIT, the University of Virginia, and the National Radio Astronomy Observatory, will increase HERA's capability in several different ways. “Expanding HERA will help us map bubbles of ionization around early galaxies in our universe and will extend our ability to find the earliest signs of star formation in our universe,” said Aaron Parsons, lead investigator on the HERA project and associate professor of astronomy at UC Berkeley, who noted the importance of collecting area and bandwidth for ...