IMPRS On Astrophysics: About Us GNO, BOREXINO) and in WIMP dark matter search (CRESST). The theoretical groupsare studying particle physics candidates for dark matter as well as http://www.imprs-astro.mpg.de/about_us.html
Extractions: Basics About us Where we are IMPRS Supervisors IMPRS Committees Academic Matters PhD Projects PhD Supervisors Degree Requirements Admission at LMU ... Submission of PhD Thesis Teaching Lecturers Courses Previous Courses Lecture Notes Graduate Students IMPRS Students Gallery Events Seminars ... FAQ Misc. Living in Munich Housing The International Max-Planck Research School on Astro phy sics is a graduate School which offers a Ph.D. pro gram in Astrophysics and Cosmology. Open for students from all countries world wide, the school intends to attract highly-qualified and motivated young scientists which aim for a graduate degree in Physics and Astronomy. Outstanding research facilities and training programs as well as Ph.D. fellowships available for all students provides a unique environment for participants. Founded in 2000 on an initiative of the Max-Planck Society, the following internationally renowned institutes and research groups form the school: The Max-Planck Institute for extraterrestrial Physics (MPE)
CDMS Experiment Results Refute Recent WIMP Dark Matter Claim Some light may soon be shed on dark matter, the invisible stuff of which most of Astrophysics where he has been leading the search for WIMP candidates. http://www.lbl.gov/Science-Articles/Archive/dark-matter-CDMS.html
Extractions: Some light may soon be shed on dark matter, the invisible stuff of which most of the universe seems to be made. The Cryogenic Dark Matter Search (CDMS), a collaboration of researchers from 10 institutions including the Lawrence Berkeley National Laboratory, has announced the achievement of "the world's best discrimination in the search for dark matter." Their findings appear "incompatible" with the findings reported by another multi-institutional collaboration. OUR MILKY WAY GALAXY APPEARS TO BE SURROUNDED BY A HALO OF GAMMA RAYS. ONE POSSIBLE CAUSE FOR THIS HIGH-ENERGY GLOW ARE WIMPS WEAKLY INTERACTING MASSIVE PARTICLES THAT WOULD BE THE PRIME CONSTITUENTS OF DARK MATTER, THE INVISIBLE STUFF OF WHICH MOST OF THE UNIVERSE SEEMS TO BE MADE. Photo courtesy of NASA Various astronomical observations together with more than 70 years of combined astrophysics and particle physics research have shown that perhaps as much as 90 percent of the known universe is made up of matter that is visible to us only by its gravitational effects. Since it cannot be seen by the light it emits, this matter has been dubbed "dark." The nature of dark matter holds implications for the evolution, structure, and ultimate fate of the universe, as well as for our current physics models. Consequently, astrophysicists and cosmologists have undertaken an intense search for the source of dark matter. One of the prime potential candidates is a family of weakly interacting massive particles or "WIMPS."
Astrophysics Introductory Course Astrophysics Introductory Course of the IMPRS at the LMU Components;Rotation curves, TullyFisher relation, dark matter; Disk dynamics, http://www.usm.uni-muenchen.de/people/bender/imprs/imprs_intro.html
Extractions: To view them you can download the Acrobat Reader for free: The limiting factors Telescopes and instruments Astrophysical Objects (a slide show) Bibliography imprs_chapter0_2005.pdf Equilibrium distribution functions Equations of state Boltzmann and Saha equations Atomic and molecular transitions Interaction cross sections and radiation processes Radiative transfer imprs_chapter1_2005.pdf
Science -- Sign In ASTROPHYSICS Orbiting Observatories Tally dark matter. Charles Seife. WASHINGTON,DCAs galaxy clusters belch xrays in all directions, they reveal the http://www.sciencemag.org/cgi/content/short/293/5537/1970a
Extractions: You do not have access to this item: Summary : Seife, ASTROPHYSICS: Orbiting Observatories Tally Dark Matter, Science You are on the site via Free Public Access. What content can I view with Free Public Access If you have a personal user name and password, please login below. SCIENCE Online Sign In Options For Viewing This Content User Name Password this computer. Help with Sign In If you don't use cookies, sign in here Join AAAS and subscribe to Science for free full access. Sign Up More Info Register for Free Partial Access including abstracts, summaries and special registered free full text content. Register More Info Regain Access to a recent Pay per Article purchase Need More Help? Can't get past this page? Forgotten your user name or password? AAAS Members activate your FREE Subscription
Science -- Sign In To divine the properties of dark matter, astronomers first must find out where it Ludovic Van Waerbeke of the Institute of Astrophysics in Paris (IAP), http://www.sciencemag.org/cgi/content/full/300/5627/1894
Extractions: You do not have access to this item: Full Text : Irion, The Warped Side of Dark Matter, Science You are on the site via Free Public Access. What content can I view with Free Public Access If you have a personal user name and password, please login below. SCIENCE Online Sign In Options For Viewing This Content User Name Password this computer. Help with Sign In If you don't use cookies, sign in here Join AAAS and subscribe to Science for free full access. Sign Up More Info Register for Free Partial Access including abstracts, summaries and special registered free full text content. Register More Info Pay per Article 24 hours for US $10.00 from your current computer Regain Access to a recent Pay per Article purchase Need More Help? Can't get past this page? Forgotten your user name or password? AAAS Members activate your FREE Subscription
NERSC 2003 Annual Report : Astrophysics : Universe: The Movie In the cold dark matter theory, structure grows hierarchically by The darkside of the halo occupation distribution, Astrophysics Journal (submitted); http://old-www.nersc.gov/research/annrep03/advances/1.1.universe.html
Extractions: Universe: The Movie How did the Universe evolve from a generally smooth initial state after the Big Bang (as seen in the cosmic microwave background radiation) to the chunky texture that we see today, with clusters, filaments, and sheets of galaxies? That is the question of large-scale structure formation. In the cold dark matter theory, structure grows hierarchically by gravitational attraction, with small objects merging in a continuous hierarchy to form more and more massive objects. The concept of dark matter halos came from the realization that the dark matter in a galaxy extends well beyond the visible stars and gas, surrounding the visible matter in a much larger halo; the outer parts of galaxies are essentially all dark matter. Scientists came to this conclusion because of the way stars and galaxies move, and because of a phenomenon called gravitational lensing: when light passes through the vicinity of a galaxy, the gravity of the dark matter halo bends the light to different wavelengths, acting like imperfections in the glass of a lens. Figure 1
Research In Astrophysics And Cosmology At OSU cosmic rays; dark matter; and other aspects of particle and nuclear astrophysics My other main interest is the nature of the dark matter and the http://www.physics.ohio-state.edu/~astro/research.html
Extractions: CASE.EDU: HOME DIRECTORIES SEARCH SEARCH NEWS: RELATED SITES: Case physicist serves as experiment's deputy project manager May 5, 2004 With the first data from their "underground observatory" in Northern Minnesota, scientists of the Cryogenic Dark Matter Search (CDMS II)—including Dan Akerib of Case Western Reserve University—have peered with greater sensitivity than ever before into the suspected realm of the Weakly Interacting Massive Particles (WIMPs). The sighting of WIMPs could answer the double-mystery of dark matter on the cosmic scale of astrophysics, and of supersymmetry on the subatomic scale of particle physics. We know that neither our Standard Model of particle physics, nor our model of the cosmos, is complete," said experiment spokesperson Bernard Sadoulet. "This particular missing piece seems to fit both puzzles, in particle physics and in astrophysics. We are seeing the same shape from two different directions." WIMPs, which carry no charge, are a study in contradictions. While physicists expect them to have about one hundred times the mass of protons, their ghostly nature allows them to slip through ordinary matter while leaving barely a trace. The term "weakly interacting" refers not to the amount of energy deposited when they interact with normal matter, but rather to the fact that they interact extremely infrequently. In fact, as many as a hundred billion WIMPs may have been streaming through your body undetected while you have been reading these first few sentences.
The Dark Matter Mystery. The dark matter Mystery 90% of the mass in the universe is not visible, Particle Astrophysics has taken center stage. The suspense is almost too much http://www.umich.edu/~lowbrows/reflections/1999/lsimmons.8.html
Extractions: Printed in Reflections: December, 1999. There are three possibilities in determining the Effective Omega (the density parameter of the universe divided by the critical density of the universe): Recollapse (meaning a closed universe) if Omega is greater than one. Expansion forever but gradually slowing down and stopping at infinity (meaning a flat universe) if Omega is equal to one. Expansion forever (meaning an open universe) if Omega is smaller than one. Considering the nature of Dark Matter: It should be emphasized that cosmology is joining the list of experimental sciences by using many techniques, including astronomy, astrophysics, particle physics, nuclear physics, condensed matter physics, low temperature physics, you-name-it physics, etc. The list continues to expand. Where will it all end? Particle Astrophysics has taken center stage. The suspense is almost too much to bear. This page originally appeared in Reflections of the University Lowbrow Astronomers (the club newsletter).
Pr-28-01.html The nature of dark matter is one of the fundamental puzzles in astrophysics today . Alternatively, dark matter may consist of massive compact objects http://www.eso.org/outreach/press-rel/pr-2001/pr-28-01.html
Extractions: ESO OUTREACH HOME INDEX HELP ... VLT INFORMATION Information from the European Southern Observatory Embargoed until Wednesday, December 5, 2001, 20:00 hrs CET (19 hrs UT) Summary An international team of astronomers has observed a Dark Matter object directly for the first time Images and spectra of a MACHO microlens - a nearby dwarf star that gravitationally focuses light from a star in another galaxy - were taken by the NASA/ESA Hubble Space Telescope (HST) and the European Southern Observatory's Very Large Telescope (VLT) The result is a strong confirmation of the theory that a large fraction of Dark Matter exists as small, faint stars in galaxies such as our Milky Way PR Photo 35a/01 : HST image of a MACHO. PR Photo 35b/01 : VLT spectrum of a MACHO. The nature of Dark Matter is one of the fundamental puzzles in astrophysics today. Observations of clusters of galaxies and the large scale structure of individual galaxies tell us that no more than a quarter of the total amount of matter in the Universe consists of normal atoms and molecules that make up the familiar world around us. Of this normal matter, no more than a quarter emits the radiation we see from stars and hot gas. So, a large fraction of the matter in our Universe is dark and of unknown composition For the past ten years, active search projects have been underway for possible candidate objects for Dark Matter. One of many possibilities is that the Dark Matter consists of weakly interacting, massive sub-atomic sized particles known as
ESF - Neutrino Astrophysics (NEUTRINO) HighEnergy Neutrinos as a Diagnostic for dark matter The aim here is to probethe distribution of dark matter in our galaxy by analysing the signature of http://www.esf.org/esf_article.php?activity=2&article=34&domain=1&page=70
DUSEL Supporters Special interests dark matter search with liquid xenon Special interestsdark matter, Supernova neutrino detection, Nuclear Astrophysics Ann Nelson http://www.int.washington.edu/DUSEL/supporters.html
Limits On Galactic Dark Matter With 5 Years Of EROS SMC Data Astronomy Astrophysics. Limits on Galactic dark matter with 5 years of EROSSMC data. C. Afonso1, 2, 3, JN Albert4, J. Andersen5, R. Ansari4, http://www.edpsciences.org/articles/aa/abs/2003/12/aa3417/aa3417.html
Extractions: Choose a journal Actualité Chimique Agronomie Agron. Sustain. Dev Analusis Anim. Res. Ann. Phys. Fr. Ann. For. Sci. Apidologie Aquat. Living Resou EAS Publications Se Environ. Biosafety Épistémologiques EPJdirect ESAIM: COCV ESAIM: M2AN ESAIM: PROC E.J.E.S.S. Eur. Phys. J. AP Eur. Phys. J. A Eur. Phys. J. B Eur. Phys. J. C Eur. Phys. J. D Eur. Phys. J. E Europhys. Lett. Europhysics News Fruits Genet. Sel. Evol. J. Chim. Phys. J. Phys. I France J. Phys. II France J. Phys. III France J. Phys. IV France Lait Mater. Tech. Méc. Ind. Microsc. Microanal. Nat. Sci. Soc. Quadrature Radioprotection RAIRO Oper. Res. RAIRO - Theoret. In Reprod. Nutr. Dev. REE Rev. Met. Paris Vet. Res. 20 Sep 05 Mirror sites: France USA CDS First visit ... Press releases
Extractions: The initial radial density profiles of dark matter halos are laid down by gravitational collapse in hierarchical structure formation scenarios and are subject to further compression as baryons cool and settle to the halo centers. We here describe an explicit implementation of the algorithm, originally developed by Young, to calculate changes to the density profile as the result of adiabatic infall in a spherical halo model. Halos with random motion are more resistant to compression than are those in which random motions are neglected, which is a key weakness of the simple method widely employed. Young's algorithm results in density profiles in excellent agreement with those from N-body simulations. We show how the algorithm may be applied to determine the original uncompressed halos of real galaxies, a step which must be computed with care in order to enable a confrontation with theoretical predictions from theories such as LCDM. References and citations for this submission:
VI. PARTICLE PHYSICS WITHOUT ACCELERATORS dark matter experiments are probing wider mass ranges than existing accelerators . A. THE RELATION BETWEEN PARTICLE PHYSICS AND ASTROPHYSICS http://www.hep.net/documents/drell/sec6.html
Extractions: While accelerators can deliver larger numbers of particles with a specific energy, non-accelerator experiments can selectively probe territory beyond the reach of accelerators that we know how to build today. Supernovae shocks and black holes produce particles of higher energy than we can make. Dark matter experiments are probing wider mass ranges than existing accelerators. Proton decay experiments give us information about physics on an energy scale too high for us to reach now by any other means. A. THE RELATION BETWEEN PARTICLE PHYSICS AND ASTROPHYSICS In this chapter, we focus on particle astrophysics, a relatively new subfield of particle physics that shares many intellectual frontiers with high-energy physics. Although the experiments in particle astrophysics are not directly associated with accelerators, the two disciplines have common roots and many physicists take part in both. There are some 250 experimental particle astrophysicists. The questions addressed by particle astrophysics are among the most fundamental puzzles of science today. Why do we live in a universe that is made of matter and not a mix of matter and antimatter? What is the nature of the dark matter that constitutes more than 90% of the mass of the universe? If indeed dark matter can be proven to be non-baryonic, this would be the ultimate Copernican revolution: not only are we not at the center of the universe, but we are not even made of what it is mostly made. What is the origin of the large scale structure of the universe? Are quantum phenomena the seeds for tiny density enhancements that have now become galaxies? How do stars shine and die, and what do the neutrinos we observe tell us about these mechanisms? What are the giant accelerators in the cosmos and what can we learn about fundamental physics by studying them?
The Interaction Point, January 23, 2004 Astrophysics Program Investigates dark matter Synchrotron Research Reveals Howto Remove Uranium from Water The Many Lives of Mark II http://www2.slac.stanford.edu/tip/2004/jan23/astrophysics.htm
Extractions: January 23, 2004 Back to SLAC Homepage Back to TIP Homepage In this issue: FRONT PAGE SPECIAL: SPEAR3 DEDICATION FEATURES POLICIES AND PROCEDURES EVENTS ABOUT TIP Astrophysics Program Investigates Dark Matter By Linda DuShane White Steve Kahns primary focus as Deputy Director of the Kavli Institute for Particle Astrophysics and Cosmology (KIPAC) is to develop major new programs. "As is essential for scientific programs at SLAC, two programs have been presented to and approved by the Experimental Program Advisory Committee (EPAC) in November 2003. So we have the green light to go forward," explains Kahn. These two programs are cornerstone elements of the new Kavli experimental program. Both are in the early stages, and both involve relatively substantial programs in experimental cosmology performed at SLAC. "Both of these projects are very visible national projects that have a prominent role in U.S. programs," Kahn added.
Cosmology Astrophysics Twin Universe matter against dark matter. Intern . 6 - JPPetit and P.Midy matter ghost matter astrophysics. http://www.jp-petit.com/science/f300/f301.htm
Extractions: 3-P.Midy and J.P.Petit Scale Invariant Cosmology International Journal of Modern Physics D, vol.8 June 1999 pp.271-280 Twin matter against dark matter. Intern. Meet. on Atrophys. and Cosm. " Where is the matter ? ", Marseille 2001 june 25-29. Preprints - J.P.Petit and P.Midy Repulsive dark matter
Focus On Dark Matter dark matter in Astrophysics and Particle Physics 1998 Proceedings of the SecondInternational Conference on dark matter in Astro and Particle Physics, http://www.iop.org/EJ/abstract/1367-2630/2/1/001
Extractions: Create account Alerts Contact us IOP Journals Home ... This volume Klaus Pretzl 2000 New J. Phys. EDITORIAL This `Focus on Dark Matter' cluster of articles is the very first in a series of featured topics to appear in New Journal of Physics that will be of great interest to the physics community. The idea is to bring together contributions from leading researchers in topical fields to provide insights into the key issues for both experts and non-specialists alike. Investigations of dark matter in the universe are of fundamental interest to astronomers, astrophysicists, cosmologists, and nuclear and particle physicists. Recent developments have provided new insight into the matter budget of the universe. Using supernovae of type 1a as standard candles, distance measurements indicate an accelerating expansion of the universe. This result suggests a non-zero cosmological constant, and the resulting vacuum energy density contributes 70% of the critical mass of the universe. Gravitational lensing, originally proposed by Einstein and later utilized for mass determination of galactic clusters by F Zwicky and others, has recently been used to map dark matter in clusters and large-scale structures. These experiments show that 30% of the critical mass is contained in these structures, of which only 3% is visible. Since the baryonic component of matter is only 6% of the critical mass, assuming a Hubble constant of 60 km s
