
	Where results make sense

Topic: WMAP

Related Topics

Wilkinson Microwave Anisotropy Probe WMAP

In the News (Tue 2 Dec 08)

Damian Green

Sumner Redstone

Crimson Tide

Tommy Tuberville

Bill Clinton

Wayne Rooney

Vilasrao Deshmukh

Wake Forest

Grand Slam

Oklahoma State

	WMAP - Wikipedia, the free encyclopedia
		The science goals of the WMAP broadly dictate that the relative CMB temperature be measured accurately over the full sky with high angular resolution and sensitivity.
		The specific goal of WMAP is to map the relative CMB temperature over the full sky with an angular resolution of at least 0.3°, a sensitivity of 20 µK per 0.3° square pixel, with systematic artifacts limited to 5 µK per pixel.
		WMAP scans the sky in such a way as to cover ~30% of the sky each day and as the L2 point follows the Earth around the Sun WMAP observes the full sky every six months.
	en.wikipedia.org /wiki/WMAP (795 words)

	WMAP Status: Overview
		WMAP is the first mission to use an L2 orbit as its permanent observing station.
		WMAP Arrives at L2 Following a three month journey, WMAP arrived safely at its permanent observing station near the L2 Lagrange Point, a quasi-stable position 1.5 million km from Earth in the direction opposite the Sun.
		Two of the WMAP first-year papers were listed as the two most highly cited papers in all of space science.
	wmap.gsfc.nasa.gov /m_mm/ms_status.html (417 words)

	NASA - Top Story - NEW IMAGE OF INFANT UNIVERSE REVEALS ERA OF FIRST STARS, AGE OF COSMOS, AND MORE - Feb. 11, 2003
		WMAP will continue to observe the cosmic microwave background for an additional three years, and its data will reveal new insights into the theory of Inflation and the nature of the dark energy.
		WMAP is named in honor of David Wilkinson of Princeton University, a world-renown cosmologist and WMAP team member who died in September 2002.
		WMAP is the result of a partnership between the NASA Goddard Space Flight Center and Princeton University.
	www.nasa.gov /centers/goddard/news/topstory/2003/0206mapresults.html (1179 words)

	First year results from the Wilkinson Microwave Anisotropy Probe (WMAP)
		WMAP was created with the aim of extending on previous observations in two main ways: to make a map of the full sky, and to measure the CMB with much improved precision by minimizing systematic errors.
		WMAP is a critical test of these models, and finds them in good agreement with the data.
		In addition to this WMAP also finds that the fluctuations are entirely consistent with Gaussianity, and have placed the tightest constraints yet on the level of non-Gaussianity within the primordial spectrum.
	www.phys.lsu.edu /mog/mog22/node8.html (1328 words)

	WMAP Year Two Data? - Bad Astronomy and Universe Today Forum (Site not responding. Last check: 2007-10-21)
		WMAP was supposed to report the results from the analysis of the second year's worth of satellite data early this year, but this has been delayed quite a bit already, and evidently is being delayed even more.
		The WMAP team is still struggling to determine whether the anomalies are real or merely the result of errors in the data analysis, and in the meantime they have not released the second-year data.
		WMAP team member Hinshaw says the first sky maps of polarisation may be completed in a matter of weeks.
	www.bautforum.com /showthread.php?t=23857 (3203 words)

	UCLA News
		NASA's WMAP mission observes the universe as it was 380,000 years after the Big Bang, and is making a detailed investigation of the sky's cosmic microwave background — the radiant heat left over from the Big Bang — to help us understand the structure of the universe.
		WMAP has provided insights into the amount of mysterious dark matter in the universe; many scientists had believed dark matter makes up 90 percent or more of the universe.
		WMAP reveals the universe is 13.7 billion years old, with an uncertainty of only 200 million years.
	newsroom.ucla.edu /page.asp?id=3903 (853 words)

	IEEEVM: The Wilkinson Microwave Anisotropy Probe (WMAP)
		WMAP is more sensitive than COBE and, therefore, will map the CMB with greater sensitivity and higher resolution.
		A major goal of the science of cosmology (the study of the nature of the universe) is to determine the statistical properties of the universe.
		The most prominent feature of WMAP is a pair of back-to-back telescopes that focus the microwave radiation from two spots on the sky roughly 140° apart and feed it to 10 separate differential receivers that sit in an assembly directly underneath the optics.
	www.ieee-virtual-museum.org /collection/event.php?id=3456992&lid=1 (557 words)

	WMAP (Site not responding. Last check: 2007-10-21)
		WMAP is a collection of subroutines that will allow the user to create daily weather maps like the ones appearing in major U.S. newspapers.
		In the default case, WMAP attempts to choose a pleasing number of symbols along a front line by calculating the arc length of the line and spacing the symbols at equal distances along it.
		When a WMAP routine detects an error condition, it calls the routine SETER, which is the principal routine in the error-handling package for NCAR Graphics.
	ngwww.ucar.edu /ngdoc/ng4.3/supplements/wmap (7149 words)

	WMAP Cosmology 101: Age of the Universe (Site not responding. Last check: 2007-10-21)
		WMAP has been able to determine these parameters with an accuracy of better than 5%.
		When we combine the WMAP data with complimentary observations from other CMB experiments (ACBAR and CBI), we are able to determine an age for the universe closer to an accuracy of 1%.
		The expansion age measured by WMAP is larger than the oldest globular clusters, so the Big Bang theory has passed an important test.
	www.ulo.ucl.ac.uk /~diploma/year_one/NASA_cosmology/uni_101age.html (1034 words)

	Cosmology News
		The WMAP team is analyzing these data with utmost care, leading one to speculate that exciting conclusions may follow.
		Thus, efforts to determine the shape of the universe are, for the moment, dead in the water.
		Fortunately, for an independent cross-check on the WMAP data we can look forward to the Planck satellite, due to launch in 2007, which will provide a fresh view of the microwave sky.
	www.geometrygames.org /ESoS/CosmologyNews.html (1063 words)

	SPACE.com -- About WMAP and the Cosmic Microwave Background (Site not responding. Last check: 2007-10-21)
		The mission was renamed WMAP when its first findings were released.
		Scientists study the variations for clues about the size and geometry of the early universe, as well as the matter that was present when the microwave background was released.
		The WMAP spacecraft sits about 1 million miles (1.5 million kilometers) from Earth, or four times the distance to the Moon.
	www.space.com /scienceastronomy/map_mission_basics_030211.html (946 words)

	WMAP Year Two Data? - Page 9 - Bad Astronomy and Universe Today Forum (Site not responding. Last check: 2007-10-21)
		WMAP, on the other hand, is well past the date the data release was expected.
		Alessandro Melchiorri (University of Rome) is one of the cosmologists who, along with several WMAP team members, is scheduled to attend the fundamental physics conference (http://www.physics.uci.edu/CMB/) at UCIrvine March 23-25, 2006.
		The only thing I can think of is that they may talk about the status of the WMAP mission and mention some of the new results, giving their colleagues in the field a sneak preview, without releasing anything to the public.
	www.bautforum.com /showthread.php?p=700977#post700977 (4184 words)

	The Oldest Light in the Universe
		NASA today released the best "baby picture" of the Universe ever taken; the image contains such stunning detail that it may be one of the most important scientific results of recent years.
		In addition, the new portrait precisely pegs the age of the universe at 13.7 billion years, with a remarkably small one percent margin of error.
		Above: WMAP observes light emitted when the universe was 13+ billion years younger than it is today.
	www.solarviews.com /eng/oldestlight.htm (639 words)

	Mapping of cosmos backs Big Bang theory / Birth of time revealed in world according to WMAP
		By analyzing the ripples, scientists have concluded the cosmos is 13.7 billion years old; that it will expand forever until it dissipates like a cloud; that it consists mostly of mysterious "dark matter" and "dark energy," and that the first stars began forming much sooner than originally thought.
		NASA called the achievement by the Wilkinson Microwave Anisotropy Probe, or WMAP, "one of the most important scientific results of recent years." Its data "lay the foundation for a unified and coherent cosmic theory," said WMAP principal investigator Charles Bennett at the press conference.
		WMAP is a joint project of NASA and Princeton University.
	sfgate.com /cgi-bin/article.cgi?f=/c/a/2003/02/12/MN15416.DTL&type=science (806 words)

	The Day the Stars Ignited :: Astrobiology Magazine ::
		The WMAP image reveals 13 billion+ year old temperature fluctuations (shown as color differences) that correspond to the seeds that grew to become the galaxies.
		Encoded in the patterns are the answers to many age-old questions, such as the age and geometry of the Universe.
		WMAP data reveals that 23% of the Universe is unseen dark matter, a mysterious form of matter intrinsically different from atoms.
	www.astrobio.net /news/modules.php?op=modload&name=News&file=article&sid=374 (997 words)

	The Wilkinson Microwave Anisotropy Probe (WMAP) (Site not responding. Last check: 2007-10-21)
		The WMAP mission has provided the first detailed full-sky map of the microwave background radiation in the universe.
		The wavelengths of radiation detected by WMAP were in the microwave region of the electromagnetic spectrum as depicted in the NASA graphic below.
		The positioning of the WMAP satellite made use of the Lagrange point L2 which permitted it to be kept in place with a minimum expenditure of fuel and always keep its sensors pointed away from both the Earth and the Sun.
	hyperphysics.phy-astr.gsu.edu /hbase/astro/wmap.html (340 words)

	Imagine the Universe! WMAP Special Exhibit
		WMAP will be looking at a cosmic glow far older than anything that the Hubble Space Telescope or Chandra X-ray Observatory can see.
		WMAP will "map" slight temperature fluctuations within the microwave background that vary by only 0.00001° C across a chilly light that now averages 2.73° C above absolute zero.
		So WMAP is a cosmologist's dream come true, supplying the long-sought data needed to test the crazy theories we have of how it all began and how we got from there to here.
	imagine.gsfc.nasa.gov /docs/features/exhibit/map_exhibit.html (775 words)

	Max Tegmark's cosmology library: WMAP foregrounds
		We perform an independent foreground analysis of the WMAP maps to produce a cleaned CMB map (available below), useful for cross-correlation with, e.g., galaxy and X-ray maps.
		We use a variant of the Tegmark & Efstathiou (1996) technique that is completely blind, making no assumptions about the CMB power spectrum, the foregrounds, WMAP detector noise or external templates.
		Compared with the foreground-cleaned internal linear combination map produced by the WMAP team, our map has the advantage of containing less non-CMB power (from foregrounds and detector noise) outside the Galactic plane.
	space.mit.edu /home/tegmark/wmap3.html (647 words)

	New Scientist Breaking News - Tantalising evidence hints Universe is finite
		At the centre of the debate are observations by NASA's Wilkinson Microwave Anisotropy Probe (WMAP), which was launched in 2001.
		Weeks and his colleagues, a team of astrophysicists in France, say the WMAP results suggest that the Universe is not only small, but that space wraps back on itself in a bizarre way (Nature, vol 425, p 593).
		Computers at two universities and at NASA's Goddard Space Flight Center are scanning the WMAP results for all the possible patterns of circles that might exist on the microwave background.
	www.newscientist.com /article.ns?id=dn4250 (1092 words)

	Wmap
		There are a lot of ways to skin that "universal expansion" cat, and even if COBE and WMAP had shown the CMBR to be absolutely smooth, there would have been some factions of the Big Bang cosmologists dancing and clapping their hands.
		I examine the status of inflationary cosmology in light of the first-year data from the WMAP satellite, focusing on the simplest models of inflation: those driven by a single scalar field.
		The WMAP observation of the Cosmic Microwave Background is the first unified, self-consistent data set capable of putting meaningful constraints on the inflationary parameter space.
	www.physicsforums.com /showthread.php?p=248756&mode=threaded (1544 words)

	CNN.com - 'Baby pic' shows cosmos 13 billion years ago - Feb. 13, 2003
		By measuring temperature variations in the microwaves, down to a millionth of a degree, scientists on the WMAP team were able to create a picture of the early universe, before galaxies and stars were even formed.
		The image from WMAP, bottom, is 35 times sharper than a similar cosmic portrait taken in 1992 by its predecesor, the Cosmic Background Explorer.
		The data from WMAP fits with conclusions drawn from other investigations of the early universe, including observations by the Hubble telescope and the Cosmic Background Explorer, which was sent up a decade ago to study the universe's origins.
	www.cnn.com /2003/TECH/space/02/11/cosmic.portrait (690 words)

	Shape of the Universe (WMAP Special Exhibit)
		WMAP will be able to determine the likely shape of our Universe.
		WMAP will measure a great big "triangle" in the sky and see if it adds up to what a flat, Euclidean-based universe should be.
		Two sides of the triangle are equal: they correspond to the distance that light has traveled from its creation in the Big Bang to the present day.
	imagine.gsfc.nasa.gov /docs/features/exhibit/map_shape.html (642 words)

	LAMBDA - Wilkinson Microwave Anisotropy Probe
		The WMAP (Wilkinson Microwave Anisotropy Probe) mission is designed to determine the geometry, content, and evolution of the universe via a 13 arcminute FWHM resolution full sky map of the temperature anisotropy of the cosmic microwave background radiation.
		The choice of orbit, sky-scanning strategy and instrument/spacecraft design were driven by the goals of uncorrelated pixel noise, minimal systematic errors, multifrequency observations, and accurate calibration.
		In the first release of WMAP data, only the temperature data and analyses were released.
	lambda.gsfc.nasa.gov /product/map/current (253 words)

Try your search on: Qwika (all wikis)