HETDEX Discovers Thousands of Hydrogen Halos

Astronomers using data from the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) have discovered over 33,000 massive hydrogen gas halos, known as Lyman-alpha nebulae, surrounding galaxies 10 billion to 12 billion years ago during the 'Cosmic Noon'. This discovery, published in The Astrophysical Journal, increases the known number of these structures by a factor of ten, confirming they are common rather than rare. Key researchers involved include Erin Mentuch Cooper, Karl Gebhardt, and Dustin Davis. The Hobby-Eberly Telescope Dark Energy Experiment at McDonald Observatory collected the extensive data, which was analyzed with the help of supercomputers at the United States — Texas Advanced Computing Center. This finding provides a vast statistical catalog for astronomers to study the origin and evolution of early galaxies and refine existing models of the early universe. Data from the James Webb Space Telescope, supported by the United States — NASA, International — European Space Agency, and Canada — Canadian Space Agency, was also used in conjunction with HETDEX observations.