Astronomers believe that UCDs were created when more normal galaxies collided in the early Universe. Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Now, Seth and his colleagues have discovered that an ultra-compact dwarf galaxy may possess a supermassive black hole, which would make it the smallest galaxy known to contain such a giant. More information: Abstract
Context. From the Lick/IDS indices, we have obtained a luminosity-weighted age and metallicity of 11.7+/-1.4 Gyr and [Z/H] = -0.79 +/- 0.04 dex, respectively, as well as [alpha/Fe] = 0.30 +/- 0.06. So in today’s UCDs, a good part of their mass is made up of these dark remnants, largely invisible to Earth-based telescopes but fossils of a more dramatic past. the Science X network is one of the largest online communities for science-minded people. The community is divided on whether ultra compact dwarfs are small galaxies or large globular clusters. The astronomers investigated M60-UCD1, the brightest ultra-compact dwarf galaxy currently known, using the Gemini North 8-meter optical-and … Next to the interpretation as a galaxy, UCDs were also consid- They display masses, colors, and metallicities between those of globular clusters and early-type dwarf galaxies. (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 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 We report the discovery of a remarkable ultra-compact dwarf galaxy around the massive Virgo elliptical galaxy NGC 4649 (M60), which we call M60-UCD1. To have such a vast number of stars packed closely together is quite unlike anything we see today. NGC 1023) Larson and Brodie (2000, 2002) The galaxy, known as M60-UCD1, is located about 54 million light years from Earth. An ultra-compact dwarf galaxy, weighing 200 million times more than our Sun. While Hobbit galaxy was used in a press release the term ultra faint dwarf is much more common in the literature. Showing page 1. Ultracompact dwarf galaxy M60-UCD1 shines in the inset image based on images from the Hubble Space Telescope and Chandra X-Ray Telescope. You can be assured our editors closely monitor every feedback sent and will take appropriate actions. Within diameters ranging between 40 and 650 light years, they can have masses up to one billion solar. Photometric surveys of galaxy clusters have revealed a large number of ultra compact dwarfs (UCDs) around predominantly massive elliptical galaxies. These more massive stars consume hydrogen (their nuclear fuel) much more rapidly, before ending their lives in violent supernova explosions. To study its stellar population content, we measured the Lick/IDS indices and compared them with predictions of single stellar population models, and we used the full spectral fitting technique. Its GC/UCD system is completely unexplored. (2009, February 13). Aims. We analyzed confirmed GCs, examined putative GC candidates, and looked for new GCs around the nearby dwarf spiral galaxy NGC 247 at about 3.5 … We recently reported the discovery of a new galaxy type, ultra-compact dwarf (UCD) galaxies, in both the Fornax and Virgo clusters. ultra-compact dwarf galaxies (UCDs). The The galaxy â dubbed M60-UCD1 â was found in the Virgo cluster, located about 54 million light years from the Milky Way. This is the closest massive UCD known and the first spectroscopically verified massive UCD which is located in a low-density environment. Royal Astronomical Society (RAS). The information you enter will appear in your e-mail message and is not retained by Tech Xplore in any form. The tidal theory of dwarf galaxy formation proposed by Kroupa is not supported by the major of people who work in dwarf galaxies. 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, Â© Phys.org 2003 - 2020 powered by Science X Network. It was discovered with NASA's Hubble Space Telescope and follow-up observations were done with NASA's Chandra X-ray Observatory and ground-based optical telescopes. . The astronomers think that at one time, each UCD had an incredibly high density of stars, with perhaps 1 million in each cubic light year of space, compared with the 1 that we see in the region of space around the Sun. Ultra-Compact Dwarf Galaxies in Galaxy Clusters 377.
2020 ultra compact dwarf galaxy