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Missing Baryons Found in Far-Out Reaches of Galactic Halos


Missing Baryons Found in Far-Out Reaches of Galactic Halos
Berkeley Lab physicists play key role in studies that solve a cosmological mystery
March 16, 2021
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A new study has found that a share of particles that has been challenging to locate is most likely sprinkled across the distant bounds of galaxy halos. The study found some of these particles of baryonic matter are located up to 6 million light-years from their galactic centers. This color-rendered image shows the halo of the Andromeda galaxy, which is the Milky Way’s largest galactic neighbor. (Credit: NASA)
By Glenn Roberts Jr.
Researchers have channeled the universe’s earliest light – a relic of the universe’s formation known as the cosmic microwave background (CMB) – to solve a missing-matter mystery and learn new things about galaxy formation. Their work could also help us to better understand dark energy and test Einstein’s theory of general relativity by providing new detai ....

United States , Milky Way , Magallanesy Antaica Chilena , New Mexico , Nicholas Battaglia , Simone Ferraro , Stefania Amodeo , Emmanuel Schaan , Emily Moser , University Of California , Dark Energy Spectroscopic Instrument , Cardiff University , Canadian Institute For Theoretical Astrophysics , National Science Foundation , Divisional Fellow In Berkeley Lab Physics Division , University Of Toronto , Office Of Science , National Energy Research Scientific Computing Center , Alfredp Sloan Foundation , Baryon Oscillation Spectroscopic Survey , Princeton University , Lawrence Berkeley National Laboratory , Cornell University , European Space Agency , Berkeley Lab , Flatiron Institute ,

Ancient light illuminates matter that fuels galaxy formation


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ITHACA, N.Y. - Using light from the Big Bang, an international team led by Cornell University and the U.S. Department of Energy s Lawrence Berkeley National Laboratory has begun to unveil the material which fuels galaxy formation.
There is uncertainty on the formation of stars within galaxies that theoretical models are unable to predict, said lead author Stefania Amodeo, a Cornell postdoctoral researcher in astronomy in the College of Arts and Sciences, who now conducts research at the Observatory of Strasbourg, France. With this work, we are providing tests for galaxy formation models to comprehend galaxy and star formation. ....

New Mexico , United States , Simone Ferraro , Stefania Amodeo , Mike Niemack , Emmanuel Schaan , Stevek Choi , Emily Moser , Nick Battaglia , Lawrence Berkeley , Cornell Center , A National Science Foundation Astronomy , Baryon Oscillation Spectroscopic , Lawrence Berkeley National Laboratory , National Science Foundation , Cornell University , Berkeley Lab , College Of Arts , European Space Agency Planck , National Science Foundation Atacama Cosmology Telescope , Big Bang , Cosmology Telescope , Gas Thermodynamics , Thermal Sunyaev Zel Dovich Measurements , Physical Review , Atacama Cosmology Telescope ,