Advanced Physics Forums - Author Subject Finding dark matter. Astrophysics NewsBoy. Posts 245 Registered10-10-2003 Location The Netherlands Member Is Offline School RSG Broklede. http://www.advancedphysics.org/viewthread.php?tid=88
BUBL LINK / 5:15 Internet Resources: Astrophysics DeweyClass 523.01 ResourceType article abstracts Location france, europe Lastchecked 20001215 Particle and Astrophysics of dark matter Paper discussing http://bubl.ac.uk/link/a/astrophysics.htm
Extractions: BUBL LINK / 5:15 Catalogue of Internet Resources Home Search Subject Menus A-Z ... About A-Z Index Titles Descriptions Astrobiology Web Astrophysics Preprint Server Astroweb: Astronomy and Astrophysics on the Internet Center for Particle Astrophysics ... WWW Virtual Library: Astronomy and Astrophysics Page last updated: 17 March 2003 Comments: bubl@bubl.ac.uk Astrobiology Web A searchable collection of resources in the field of astrobiology including cosmochemistry, chemical evolution, the origin and evolution of life, planetary biology and chemistry, formation of stars and planets (space science), and expansion of terrestrial life into space.
Dark Matter Presentations CIAM, Moscow); PDF The Extent of the dark matter Halo Ramanath Cowsik(Indian Institute of Astrophysics); PPT Galaxies Formation http://www.physics.ucla.edu/hep/DarkMatter/dmtalks.htm
Extractions: Dark Matter 2002 Presentations Please click on highlighted link to access each presentation. [PPT] requires MS Powerpoint to open; [PDF] requires Adobe Acrobat Reader; [PS] requires a Postscript reader. To see a list of Dark Matter 2002 attendees, please click here . If you are having difficulty accessing any of these files, please contact dm2002@physics.ucla.edu . Talks will continue to be uploaded as they're received. Last upload: April 4, 2002. February 20 9:30am
Extractions: A new generation of particle detector that operates at temperatures near absolute zero has proven extremely accurate in identifying the particles that crash through it, an international team of scientists reported last week. The novel detector, buried 35 feet underground on the Stanford University campus, has dedicated itself for more than a year to the search for exotic and elusive particles that, according to some theories, make up more than 90 percent of the mass of the universe. Though the device has yet to find evidence of such particles - known collectively as WIMPs, or weakly interacting massive particles - it has proved to have a keen ability to discriminate between the different kinds of particles that zip through it. Developed over the past 11 years by scientists at 10 institutions and coordinated by the Center for Particle Astrophysics at the University of California, Berkeley, it uses germanium or silicon semiconductors cooled to several hundredths of a degree above absolute zero, the coldest possible temperature. The scientific team goes by the name Cryogenic Dark Matter Search, or CDMS.
Extractions: 24 May 2002 TOM CLARKE Two astronomers have snatched a tantalizing glimpse of what could be cold dark matter clumped around distant galaxies. Cold dark matter is one of the leading candidates to explain the mystery of the Universe's missing matter. Gravitational lenses suggest dark matter is dotted round galaxies. "This is not proof that it's there, but it is in agreement with what we'd expect to see if it was," says one of the pair, Christopher Kochanek of the Harvard-Smithsonian Centre for Astrophysics in Cambridge, Massachusetts. The size of the Universe and the speed at which it is expanding means that it contains about 80% more matter than all the visible stars, planets and dust clouds account for. Because we can't see this matter, physicists have dubbed it, whatever it happens to be, dark matter. One strong theory predicts that it comprises invisible, weakly interacting massive particles, or WIMPs, collectively called cold dark matter. To look for this cold dark matter, which, if it exists, is not emitting or reflecting any light, Kochanek and colleague Neal Dalal of the University of California, San Diego, are using radio telescopes and a phenomenon called gravitational lensing.
00011 concerning atmospheric neutrinos, dark matter, high energy cosmic neutrinos, andother subjects. The International Symposium on Neutrino Astrophysics, to be http://www.uap.co.jp/uap/Publication/SERIES/DATA/00011/
Extractions: This book contains the proceedings of the International Symposium on Neutrino Astrophysics to be held at Takayama/Kamioka, Japan on October 19-22,1992. In 1987, neutrinos arriving from the supernova explosion, were detected for the first time in human history by the Kamiokande Group in Japan and by the Irvine, Michigan and Brookhaven (IMB) Group in the United States; having arrived from the Large Magelanic Cloud 170 thousand light years away from Earth. Observations of these supernova-produced neutrinos have since provided significant contributions to the fields of astrophysics and particle physics.
Astronomy And Astrophysics - Suite101.com Welcome to the Astronomy and Astrophysics Topic area in Suite101 Side III About 97%of what makes the Universe is unknown, a combination of dark matter and dark http://www.suite101.com/welcome.cfm/astronomy_astrophysics
Extractions: Search The Web Member Central Join Our Community! Login What's New Become a SuiteU Affiliate ... MemberUpdate Suite University About Suite University Suite University News Visit the University Course Listing ... FREE Demo Course New Topics SpiritWell Travel Book Reviews Agora News Foraging Wild Foods ... More... Suite Events Teacher Appreciation Event 2004 Family Focus 2004 In Tune With Johann Sebastian Bach More about Suite101 About Suite101.com Advertise With Suite For more information - Select a related topic - Adult Education Amateur Astronomy Astronomy and Astrophysic Biographies of Scientists Homeschool Curriculum Rev Indexing Making Learning FUN! Math is fun Physics Lite Saving For College Science Surfing Social and Emotional Lear Success Strategies for Co Teachers Using Technology Teaching Computers To Chi Welsh Language Words, Words, and More Wo Writing Well - Select a related course - Adventures in Impressioni Awesome Grades in Math an Beyond Stenciling Creating Dynamic Unit Stu Cure Your Math Anxiety: B Developing Basic Grammar Effective College Strateg Grant Research and Writin Helping with Homework Homeschooling Your Specia How to Start Homeschoolin Learning a Second Languag Stenciling 101 Study of Linguistics and Teacher's Net Teaching Writing to Child Teaching Writing to Child Understanding Poetry Visual Literacy - A Cours Visit Education Detailed Topic List Home Science and mathematics ... Astronomy Astronomy and Astrophysics
Theory Seminar Series Archives Laboratory Astrophysics of Supersymmetry and dark matter. MichaelPeskin, September 22, 2003. SLAC, Stanford University. You have http://pitp.physics.ubc.ca/TSArchives/20030922/20030922.html
Extractions: You have already learned from Sean Carroll that the energy in the universe is preposterously composed of three major ingredients: baryonic matter, dark matter, and dark energy. Dark matter is still unidentified, but there are good candidates for it from particle physics. In particular, it was proposed 20 years ago that extensions of the Standard Model with supersymmetry provide an explanation for the dark matter. In this lecture I will review that story and explain a recently understood twist, that the now- understood density of dark matter requires a supersymmetric model to have special properties, constraining the large parameter space. The discovery of supersymmetry at the next generation of accelerators would allow us to study dark matter in the laboratory and provide a microscopic prediction of the dark matter density. I will discuss what is needed from this next phase of "laboratory astrophysics". Additional resources for this talk: Slides . You may need Adobe Acrobat Reader for this resource.
Particle Astrophysics At Brown graduate students, and undergraduates conducting experimental work in astrophysicsand high and XENON, both of which aim to learn more about WIMP dark matter. http://particleastro.brown.edu/homeframe.html
Extractions: Welcome! We are the Particle Astrophysics research group at Brown University, which is part of the wider Cosmology and Astrophyics Program of the Brown University Physics Dept . Our group consists of faculty, post docs, graduate students, and undergraduates conducting experimental work in astrophysics and high energy physics. We are involved in two research collaborations, CDMS II and XENON , both of which aim to learn more about WIMP dark matter. Group Leader: Prof Rick Gaitskell, Brown University [ email / personal web ]. Please contact him directly for research opportunities, and also take time to look at our web site. CDMSII in the News:
X-Ray Clusters Universe XRay Clusters in a Cold + Hot dark matter Universe. Greg L. Bryan andMichael L. Norman Laboratory for Computational Astrophysics, National Center http://zeus.ncsa.uiuc.edu:8080/chdm_script.html
Extractions: Computing the Universe: X-Ray Clusters in a Cold + Hot Dark Matter Universe Greg L. Bryan and Michael L. Norman Laboratory for Computational Astrophysics, National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign. X-ray telescopes orbiting the Earth have discovered that clusters of galaxies are immersed in halos of million degree gas. This hot gas is a byproduct of the galaxy formation process and emits large amounts of energy in the form of X-rays. (33k JPEG) So luminous are these X-ray clusters they are visible to cosmological distances. Consequently, astronomers study X-ray clusters because they map out the large scale structure of the universe. Here, we study the formation of X-ray clusters by means of numerical simulations. (116K MPEG) The calculation begins roughly one billion years after the big bang, when the universe was denser and more uniform than it is today. In this illustration, a closed two-dimensional universe is represented as the surface of an expanding sphere. The calculation is performed in a patch hundreds of millions of light years on a side, which is large enough to fairly represent the universe as a whole. The calculation follows the growth of initially small matter density fluctuations as the universe expands. (132K MPEG) To more clearly see the structure formation process, let's repeat the last sequence and view it in a frame which is comoving with the expanding universe. Here one sees how small fluctuations grow and cluster into larger coherent structures. This behavior is caused by gravity, which has overcome the cosmic expansion and pulled slightly overdense regions into dense filaments, seen here in green. The intersection of filaments, seen in red, locate where rich clusters of galaxies form, as well as their hot X-ray halos.
Theoretical Astrophysics And Cosmology include the nature of dark matter and dark energy, inflationary cosmology, plasmaphysics and magnetohydrodynamics, solar and stellar astrophysics, largescale http://physics.uchicago.edu/t_astro.html
Extractions: Physics Home ON THIS PAGE: Sean M. Carroll Eugene N. Parker Robert Rosner Michael S. Turner The University of Chicago is a leader in interdisciplinary research in theoretical astrophysics and cosmology, including connections to particle physics, general relativity, and computational physics. Collaboration with the Department of Astronomy and Astrophysics is organized under the Enrico Fermi Institute . The NSF-funded Center for Cosmological Physics organizes research, symposia, a visitors program, and education/outreach activities at the interface of phyiscs and astrophysics. We also have close ties to the Fermilab Theoretical Astrophysics Group , which focuses on both early- and late-universe cosmology, and the ASCI Flash Center at Chicago, which carries out numerical studies of astrophysical thermonuclear flashes. Current research topics include the nature of dark matter and dark energy, inflationary cosmology, plasma physics and magnetohydrodynamics, solar and stellar astrophysics, large-scale structure, the cosmic microwave background, and connections to string theory and quantum gravity. Sean M. Carroll
Faculty Of Arts & Sciences: News And Events in astrophysicists quest to find dark matter in the universe, has been named directorof the HarvardSmithsonian Center for Astrophysics (CfA), director of http://www.fas.harvard.edu/home/news_and_events/releases/alcock_05172004
Extractions: Alcock to Lead Harvard-Smithsonian Center for Astrophysics Astrophysicist noted for 'dark matter' studies to take helm at Harvard, Smithsonian observatories Cambridge, Mass. - May 17, 2004 - Following an international search, Charles R. Alcock, a pioneer in astrophysicists' quest to find "dark matter" in the universe, has been named director of the Harvard-Smithsonian Center for Astrophysics (CfA), director of the Smithsonian Astrophysical Observatory, director of the Harvard College Observatory and professor of astronomy at Harvard University, effective Aug. 1, 2004. Alcock comes to the CfA from the University of Pennsylvania, where he is Reese W. Flower Professor of Astronomy. "Charles Alcock is an extraordinary astrophysicist and scientific administrator," said Harvard President Lawrence H. Summers. "I greatly look forward to working with him as we develop the University's program in astrophysics." "With his great skills, experience and expertise, Dr. Alcock is well suited to lead the Center for Astrophysics to new levels of excellence," said Lawrence Small, secretary of the Smithsonian Institution. "We're fortunate to have such a distinguished scientist joining the Center, one of the largest and most diverse astrophysical research organizations in the world."
PH 105 (Duke Astrophysics) Course Links tutorial on dark matter, Cosmology, and LargeScale Structure of the Universe;dark matter page from the Center for Particle Astrophysics; http://www.phy.duke.edu/~kolena/dukeastro.html
Extractions: properties of stars planets around other stars the search for extraterrestrial intelligence black holes ... gravitational effects on time and space (including black holes) galactic evolution cosmology inflation Big Bang ... gamma-ray bursters the 25 brightest stars the 30 closest stars from The Observer's Handbook the surface of Betelgeuse the first image of the surface of a star other than the sun Blackbody Radiation (virtual reality) Doppler Effect Applet Binary Star Applet black hole candidates (in binary systems) black hole candidates (at centers of clusters or galaxies) Hubble finds a bare black hole pouring out light massive black holes dwell in most galaxies according to '97 Hubble census a giant elliptical galaxy NGC 4261 and an unexpected new mystery... the black hole is not at the center!
PSIgate - Browse Results Particle Astrophysics Group The Particle Astrophysics Group at SheffieldUniversity undertake research into dark matter detection. http://www.psigate.ac.uk/roads/cgi-bin/psibrowse.pl?limit=0&toplevel=astronomy&s
Nuclear Research: Dept. Of Physics, Princeton University Tom Shutt Particle Astrophysics, detection of dark matter, neutrino astrophysics.PRINCETONUNIVERSITY, Site Administrator, Last Updated 124-2004, HOME. http://pupgg.princeton.edu/www/jh/research/nuclear.htmlx
Extractions: The particle and nuclear astrophysics program addresses questions of fundamental physics in astrophysical systems. Current research topics include solar neutrinos and neutrino oscillations, and dark matter detection. Princeton has a major role in the Borexino solar neutrino experiment at the Gran Sasso laboratory in Italy. The detector consists of 1300 tons of ultra-pure liquid scintillator, and will make the first direct-counting measurement of the Sun's low-energy 7Be neutrinos. This will provide a very sensitive probe of neutrino oscillations, as well as an important test of our understanding of the complex physics of the brightest available neutrino source. Princeton is involved in current and future dark matter detection experiments. The evidence is now overwhelming that some 30% of the universe is in the form of cold dark matter, but the nature of this matter remains a mystery. The most attractive theory is that it is Weakly Interacting Massive Particles (WIMPs) that froze-out of the early universe. Such particles are a generic prediction of supersymmetry, and, should they exist, dominate the Milky Way and are likely to be detectable on Earth. Princeton is involved in one of the leading dark matter experiments (CDMS), as is playing a major role in the development of a new liquid-xenon time projection chamber (XENON) that should be scalable to sufficient size to critically test the WIMP hypothesis. Particle astrophysics probes questions of fundamental importance, but still takes place in relatively small collaborations. Graduate students are involved in both hardware development and data analysis. Detector development stresses creative advances in detector sensitivity, using laboratory prototypes of manageable size.
Unsolved Problems In Astrophysics, Contents 4.3 Peculiar Motions on Large Scales, 74. 4.4 dark matter and Baryons in Clustersof Galaxies, 79. 4.5 Is 1? 81. 10.7 Summary, 217. 11 Particle dark matter, 221. http://www.sns.ias.edu/~jnb/Books/Unsolved/contents.html
Extractions: Back to Unsolved Problems Preface xiii 1 The Cosmological Parameters 1.1 Introduction 1.2 Why Measure the Parameters? Testing the Physics How Will It All End? 1.3 The State of the Measurements 1.4 Cosmology for the Next Generation 2 In the Beginning... 2.1 The Future Fate of Cosmology 2.2 Testing Inflation 2.3 The Power of the Cosmic Microwave Background 2.4 Cosmic Concordance 2.5 A New Age? 3 Understanding Data Better with Bayesian and Global Statistical Methods 3.1 Introduction 3.2 Combining Experimental Measurements 3.3 Bayesian Combination of Incompatible Measurements 3.4 Another Variant of the Method 3.5 Results for the Hubble Constant 3.6 Conclusion 4 Large-Scale Structure in the Universe 4.1 Introduction 4.2 Clustering and Large-Scale Structure Galaxies and Large-Scale Structure Clusters and Large-Scale Structure 4.3 Peculiar Motions on Large Scales 4.4 Dark Matter and Baryons in Clusters of Galaxies 4.5 Is 4.6 The SDSS and Large-Scale Structure The Sloan Digital Sky Survey Clusters of Galaxies 4.7 Summary
Frontiers - Update The UKs particle astrophysics programme has received a major boost through willbe known as the British Underground Facility for dark matter and Neutrino http://www.pparc.ac.uk/frontiers/archive/update.asp?id=10U8&style=update
Vietnam2004 Astrophysics gamma ray bursters; nuclear astrophysics; cosmic microwave background; gravity andgravitational wave physics; high energy phenomena; dark matter, dark energy; large http://opserv.obspm.fr/confs/Vietnam/astrointro.lwp/astrointro.htm
Extractions: New views on the Universe The Rencontres du Vietnam began with a meeting in Hanoi on Particle Physics and Astrophysics in December 1993; a second one was held in Saigon in October 1995. The third Rencontres du Vietnam, devoted to Condensed Matter Physics was held in Hanoi in January 1999. The fourth Rencontres du Vietnam, entitled Physics at Extreme Energies, was also held in Hanoi in July 2000. The aim of the Rencontres has been to extend the successful international collaboration of Europe, Russia, Japan and the United States in these rapidly evolving fields to the emerging Pacific rim countries. The number of countries represented and the presence of leading scientists has emphasised the importance which the international community places on scientific links with Vietnam. As a natural continuation of this series, two parallel conferences, one on particle physics and the other on astrophysics, will be organised in 2004. This section concerns the astrophysics conference. For general information concerning the two conferences, you should click here ; the home site of the Vth Rencontres du Vietnam is http://opserv.obspm.fr/confs/Vietnam/index.html
Dark Matter provide a component of the hot dark matter in the universe. Projects. Arrival directionsof munos observed by MACRO; HEAp High Energy Astrophysics; MINOS Main http://astrowww.astro.indiana.edu/dark_matter.html
Extractions: Researchers TDR figure. Half of the MINOS far detector. (CNA) The HEAp group has searched for evidence of cold dark matter (WIMPs) with the MACRO detector that would appear as a high energy neutrino signal pointing back to the center of the sun or the center of the earth. These neutrinos would result from WIMP annihilations in the center of the sun or the center of the earth. The HEAp group is also participating in the MINOS experiment that is searching for evidence of neutrino mass which could provide a component of the hot dark matter in the universe. Projects Publications Home Activities Undergraduate ... Contacts Astronomy Department
Arcetri Astrophysics Preprints Arcetri Astrophysics Preprint 14/2001. Full article (PS, ~ 86 KB ). ULTRAHIGHENERGY COSMIC RAYS FROM ANNIHILATION OF SUPERHEAVY dark matter. http://www.arcetri.astro.it/pubblicazioni/preprint/2001/14_2001.html
Extractions: The University of Chicago, Chicago, Illinois 60637-1433 We consider the possibility that ultra-high energy cosmic rays originate from the annihilation of relic superheavy dark matter. We find that a cross section of Av cm (M X GeV) is required to account for the observed rate of super-GZK events if the superheavy dark matter follows a Navarro-Frenk-White density profile. This would require extremely large-l contributions to the annihilation cross section. We also calculate the possible signature from annihilation in sub-galactic clumps of dark matter and find that the signal from sub-clumps dominates and may explain the observed flux with a much smaller cross section than if the superheavy dark matter is smoothly distributed. Finally, we discuss the expected anisotropy in the arrival directions of the cosmic rays, which is a characteristic signature of this scenario.
