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Hubble Maps The Cosmic Web Of "clumpy" Dark Matter In 3-d



*Description*: Hubble Space Telescope has a narrow field of view, which is only a fraction of the angular diameter of the Moon. Certain research programs have devoted a substantial amount of Hubble observing time to survey comparatively larger areas of sky to address a wide range of galaxy evolution and cosmological questions. This is accomplished by assembling mosaic images taken with Hubble's cameras. These surveys constrain the star formation history of the universe, probing the faintest galaxies and tracking the origin, structure, and merger history of galaxies as they evolve. [Right] - COSMOS The Cosmological Evolution Survey (COSMOS) is the largest Hubble mosaic of the sky. It covers two square degrees of sky. By comparison, the Earth's moon is one-half degree across. The survey detected over 2 million galaxies spanning 75 percent of the age of the universe. The field is being imaged by most major space-based and ground-based telescopes. [Left] - Several survey fields are nested inside the one-degree width of sky in the southern constellation Fornax. GEMS Galaxy Evolution from Morphology and Spectral Energy Distributions (GEMS) imaged an area of 900 square minutes of arc on the sky with the Hubble Space Telescope's Advanced Camera for Surveys. This contiguous field is centered on the Chandra Deep Field South, a deep X-ray telescope survey of the universe. GEMS contains roughly 10,000 galaxies down to a depth of 24th magnitude. GOODS The Great Observatories Origins Deep Survey (GOODS) unites extremely deep observations from Hubble with NASA's other space observatories (the Spitzer Space Telescope and the Chandra X-ray Observatory), and ESA's orbiting XMM-Newton telescope, as well as observations by the most powerful ground-based telescopes. GOODS covers a total of roughly 320 square arc minutes. HUDF The Hubble Ultra Deep Field is humankind's farthest view into to the universe in visible light, uncovering several thousand galaxies down to 31st magnitude. The field of view is one Hubble Advanced Camera for Surveys wide field frame. Technical facts about this news release: About this Survey Name: Cosmological Evolution Survey (COSMOS) Field Description: Astronomical Survey Position (J2000): R.A. 10h 00m 28s.6 Dec. +02° 12' 21".0 Constellation: Sextens Dimensions: The COSMOS survey field covers 2 square degrees. About the Data Mission: Hubble Subaru VLT XMM/Newton Survey Type: Optical Optical Spectral x-Ray Instrument: ACS/WFC Suprime-Cam VIMOS EPIC Principal Ivestigator: Scoville: 9822; 10092 Taniguchi Kneib Hasinger Filters/Band Pass: F814W (I) B,V,r,i,z; intermediate; narrow bands R~200 0.5-2 keV 7e-16 cgs; 2-10 keV 3e-15 cgs Exposure Date(s): Oct. 2003 - May 2004 Jan-Feb 2004; 2005 Apr. 2004 Winter 2003-Winter 2004; XMM A04 About the Image Release Credit: NASA, ESA, and R. Massey (California Institute of Technology) Release Date: January 7, 2007 Orientation/Scale: Full Resolution Image Single HST ACS COSMOS Tile [ http://imgsrc.hubblesite.org/hu/db/2007/01/images/j/formats/compass_large_web.jpg ] What is an American Astronomical Society Meeting release? A major news announcement issued at an American Astronomical Society meeting, the premier astronomy conference. An international team of astronomers using NASA's Hubble Space Telescope has created a three-dimensional map that provides the first direct look at the large-scale distribution of dark matter in the universe. Read more: * NASA Press Release [ http://hubblesite.org/newscenter/archive/releases/2007/01/text/ ] * The Full Story [ http://hubblesite.org/newscenter/archive/releases/2007/01/full/ ] *News Release Number:*: STScI-2007-01i


LICENZA : Pubblico dominio
ARGOMENTI : # in Matematica e scienze / Astronomia
TAG : tag: moon , COSMOS Field , Hubble Space Telescope (HST) , moon , Constellation , Fornax , Advanced Camera for Surveys , Spitzer Space Telescope , Visible Light , VLT , California
FONTE : Hubble Space Telescope Collection