They come from many sources and are not checked. Sign in to disable ALL ads. About 50,000 light years across. Its radial velocity was obtained with FXCOR and the penalized pixel-fitting (pPXF) code. 8) Ultra-compact dwarf galaxies (UCG, UCD) are among the most crowded stellar systems known. About 54 million light years from Earth. Formation of ultra-compact dwarf galaxies: tests of the galaxy threshing scenario in Fornax P. A. Thomas,1⋆ M. J. Drinkwater 2and E. Evstigneeva 1Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QH 2Department of Physics, University of Queensland, QLD 4072, Australia Accepted 2008 June 2. Ultra-Compact Dwarf Galaxies Genoveva Micheva genoveva@astro.su.se. Listen to the audio pronunciation of Ultra compact dwarf galaxy on pronouncekiwi. Packed with an extraordinary number of stars, M60-UCD1 is an "ultra-compact dwarf galaxy". Currently, the team prepares an analysis of the complete photometric dataset, what will be presented in a forthcoming paper. The (Phys.org)—A team of astronomers led by Favio Faifer of the National University of La Plata, Argentina, has discovered the first ultra-compact dwarf (UCD) galaxy in an X-ray bright galaxy group designated NGC 5044. Thank you for helping build the largest language community on the internet. That is why Faifer's team observed the NGC 5044 with the Gemini Multi-Object Spectrograph (GMOS) at the Gemini South telescope in Chile. Optional (only if you want to be contacted back). However, UCDs typically have sizes more than twice as large as nuclei at the same luminosity. Note: Ultra-compact dwarfs (UCDs) are stellar systems displaying colours and metallicities between those of globular clusters (GCs) and early-type dwarf galaxies, as well as sizes of Reff <= 100 pc and luminosities in the range -13.5 < MV < -11 mag. Active galaxy – Compact region at the center of a galaxy that has a much-higher-than-normal luminosity; Baby Boom Galaxy – The brightest starburst galaxy in the very distant universe; Blue compact dwarf galaxy – Small galaxy composed of up to several billion stars; Messier 82 – A starburst galaxy in the constellation Ursa Major Figure 5 Colour–velocity distributions of stars and UCDs in the. The lower panel shows the photographic. ScienceDaily, 13 February 2009. In cosmic contrast, the small, round smudge at picture center is now recognized as an ultra-compact dwarf galaxy. Science X Daily and the Weekly Email Newsletter are free features that allow you to receive your favorite sci-tech news updates in your email inbox, © Phys.org 2003 - 2020 powered by Science X Network. Mr Dabringhausen comments, “Billions of years ago, UCDs must have been extraordinary. (2017) First confirmed ultra­ compact dwarf galaxy in the NGC 5044 group. Galaxy threshing and the formation of ultra-compact dwarf galaxies Kenji Bekki and Warrick J. Couch School of Physics, University of New South Wales, Sydney 2052, Australia and Michael J. Drinkwater School of Physics, University of Melbourne, Victoria 3010, Australia ABSTRACT Recent spectroscopic and morphological observational studies of galaxies Ultra-compact dwarf galaxies (UCD) are a class of very compact galaxies with very high stellar densities, discovered in the 2000s. An ultra-compact dwarf is within the crosshairs in the lower inset, while an ultra-diffuse galaxy is featured in the upper inset. The galaxy, known as M60-UCD1, is located about 54 million light years from Earth. The galaxy, known as M60-UCD1, is located about 5… The team became intrigued by the ultra-compact dwarf galaxy M60-UCD1, some 16.6 million parsecs (54 million light years) from Earth, in part because its X … Ultra-Compact Dwarf Galaxies in Galaxy Clusters 377. Materials provided by Royal Astronomical Society (RAS). The community is divided on whether ultra compact dwarfs are small galaxies or large globular clusters. This paper investigates the possibility that ultra-compact dwarf (UCD) galaxies in the Fornax cluster are formed by the threshing of nucleated, early NASA highlighted Vo’s discovery in a September 2013 press release; according to NASA, the ultra compact dwarf galaxy found by Vo “is the most luminous known galaxy of its type and one of the most massive, weighing 200 million times more than our Sun.” In their paper Mr Dabringhausen, Professor Kroupa and their colleague Dr Holger Baumgardt present a different explanation. A., de Rossi, Maria E., Forte, Juan C. and Cellone, Sergio A. We extended our original survey of the Fornax Cluster 1 magnitude fainter, finding a further 46 new compact … 1999, Phillipps et al. In the early Universe, a newly-discovered type of galaxy, Ultra-Compact Dwarfs (UCDs) had stars packed together a million times more closely … The spectroscopic analysis of the UCD revealed a radial velocity that agrees with the velocity of the elliptical galaxy NGC 5044. An observer on a (hypothetical) planet inside a UCD would have seen a night sky as bright as day on Earth.”. Astronomy and Astrophysics, 599 (L8). ultra-compact dwarf galaxies (UCDs). Our results indicate that NGC 5044-UCD1 is most likely an extreme GC (MV ~ -12.5 mag) belonging to the GC system of the elliptical galaxy NGC 5044. Scientists have recently examined distant galaxy clusters, searching for more UCDs to help us answer this question.Origins of DwarfsIn recent years we have discovered a growing sample of small, very dense galaxies. . Astronomers believe that UCDs were created when more normal galaxies collided in the early Universe. 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