|
Local Hole
The KBC Void (or Local Hole) is an immense, comparatively empty region of space, named after astronomers Ryan Keenan, Amy Barger, and Lennox Cowie, who studied it in 2013. The existence of a local underdensity has been the subject of many pieces of literature and research articles. The underdensity is proposed to be roughly spherical, approximately 2 billion light-years (600 Parsec#Megaparsecs and gigaparsecs, megaparsecs, Mpc) in diameter. As with other void_(astronomy), voids, it is not completely empty but contains the Milky Way, the Local Group, and the larger part of the Laniakea Supercluster. The Milky Way is within a few hundred million light-years of the void's center. It is debated whether the existence of the KBC void is consistent with the Lambda-CDM model, ΛCDM model. While Haslbauer et al. say that voids as large as the KBC void are inconsistent with ΛCDM, Sahlén et al. argue that the existence of supervoids such as the KBC void is consistent with ΛCDM. Galaxies i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amy Barger
Amy J. Barger (born January 18, 1971) is an American astronomer and Henrietta Leavitt Professor of Astronomy at the University of Wisconsin–Madison. She is considered a pioneer in combining data from multiple telescopes to monitor multiple wavelengths and in discovering distant galaxies and supermassive black holes, which are outside of the visible spectrum. Barger is an active member of the International Astronomical Union. Education and career Barger earned a Bachelor of Arts in astronomy-physics in 1993 from the University of Wisconsin-Madison. She was a Marshall scholar at King's College, University of Cambridge and received a doctor of philosophy in astronomy from the university in 1997. Barger holds positions as a Henrietta Leavitt Professor of Astronomy at the University of Wisconsin-Madison and as an affiliate graduate faculty member in the University of Hawaii Department of Physics and Astronomy. Notable research Barger's research discoveries concern distant Univ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |