• Galactic Gong – Milky Way Struck and Still Ringing After 100 Million Years

    Updated: 2012-06-29 16:44:30
    When galaxies collide, stars are thrown from orbits, spiral arms are stretched and twisted, and now scientists say galaxies ring like a bell long after the cosmic crash. A team of astronomers from the United States and Canada say they have heard echoes of that ringing, possible evidence of a galactic encounter 100 million years [...]

  • What does it take to claim discovery of the Higgs?

    Updated: 2012-06-29 15:49:52
    If the Higgs exists, why has discovering it taken so long – and why, if no definitive discovery is announced next week, might it continue to take even longer?

  • Scientists discover that Milky Way was struck some 100 million years ago, still rings like a bell

    Updated: 2012-06-28 17:24:48
    Our galaxy, the Milky Way, is a large spiral galaxy surrounded by dozens of smaller satellite galaxies. Scientists have long theorized that occasionally these satellites will pass through the disk of the Milky Way, perturbing both the satellite and the disk. A team of astronomers from Canada and the United States have discovered what may well be the smoking gun of such an encounter, one that occurred close to our position in the galaxy and relatively recently, at least in the cosmological sense.

  • Discussing Gravity with Erik Verlinde

    Updated: 2012-06-28 17:22:31
    SciLogs All Blogs Next Discussing Gravity with Erik Verlinde from Marcel S . Pawlowski 28. June 2012, 18:22 We have just returned from a talk by the Bethe colloquium Erik Verlinde from the university of Amsterdam spoke about Dark Matter , Dark Energy and the Emergence of Gravity Verlinde is a dutch theoretical physicist working on string theory and gravity . He became very famous for his theory of entropic gravity and was awarded the Spinoza Prize for his work . In his talk , he showed that his approach can not only reproduce the MONDian behavior of the different kinds of galaxies . He even gave an explanation on why the centers of galaxy clusters deviate from the baryonic Tully-Fisher relation by a factor of four . The reason , he says , lies in the distribution of matter . Very roughly ,

  • ICSOS-11: 11th International Conference on the Structure of Surfaces

    Updated: 2012-06-26 00:00:00
    Conference: 21 Jul 2014 - 25 Jul 2014, University of Warwick, Coventry, United Kingdom. Organized by IOP Thin Films and Surfaces Group.

  • Interdisciplinary Surface Science Conference (ISSC-19)

    Updated: 2012-06-26 00:00:00
    Conference: 25 Mar 2013 - 28 Mar 2013, East Midlands Conference Centre, Nottingham, United Kingdom. Organized by IOP Thin Films and Surfaces Group.

  • PR'13: International conference on photorefreactive effects, materials and devices

    Updated: 2012-06-26 00:00:00
    Conference: 4 Sep 2013 - 6 Sep 2013, The Winchester Hotel, Winchester, United Kingdom. Organized by IOP Optical Group.

  • WONP-NURT 2013

    Updated: 2012-06-26 00:00:00
    Workshop: 4 Feb 2013 - 8 Feb 2013, La Habana, Cuba.

  • The Second International Conference on Radiation and Dosimetry in Various Fields of Research (RAD 2014)

    Updated: 2012-06-26 00:00:00
    Conference: 27 May 2014 - 30 May 2014, Nis, Serbia. Organized by Applied Physics Laboratory (APL), Faculty of Electronic Engineering, University of Niš, Niš, Serbia.

  • High-speed imaging for dynamic testing of materials and structures

    Updated: 2012-06-26 00:00:00
    Conference: 16 Sep 2013 - 20 Sep 2013, Institute of Physics, London, United Kingdom. Organized by IOP Applied Physics and Technology Division.

  • Seventh International Accelerator School for Linear Colliders

    Updated: 2012-06-26 00:00:00
    School: 27 Nov 2012 - 8 Dec 2012, Radisson Blu Hotel, Indore, India. Organized by P. D. Gupta, Local Committee Chair.

  • EuroDisplay 2013 (33rd International Display of Research Conference)

    Updated: 2012-06-26 00:00:00
    Conference: 16 Sep 2013 - 19 Sep 2013, Imperial College London, London, United Kingdom. Organized by IOP Optical Group and Society for Information Display.

  • International Conference on Nuclear Scattering (ICNS 2013)

    Updated: 2012-06-26 00:00:00
    Conference/exhibition: 8 Jul 2013 - 12 Jul 2013, Edinburgh International Conference Centre, Edinburgh, United Kingdom. Organized by Institute of Physics.

  • Physical Aspects of Polymer Science

    Updated: 2012-06-26 00:00:00
    Conference: 9 Sep 2013 - 11 Sep 2013, University of Sheffield, Sheffield, United Kingdom. Organized by IOP Polymer Physics Group.

  • Electron Microscopy and Analysis Group Conference 2013 (EMAG)

    Updated: 2012-06-26 00:00:00
    Conference/exhibition: 3 Sep 2013 - 6 Sep 2013, University of York, York, United Kingdom. Organized by IOP Electron Microscopy and Analysis Group.

  • IMC 2014 International Microscopy Congress

    Updated: 2012-06-26 00:00:00
    Conference/exhibition: 7 Sep 2014 - 12 Sep 2014, Prague, Czech Republic. Organized by Czechoslovak Microscopy Society + IFSM.

  • IOP Nuclear Physics Group Conference

    Updated: 2012-06-26 00:00:00
    Conference: 7 Apr 2013 - 10 Apr 2013, University of York, York, United Kingdom. Organized by IOP Nuclear Physics Group.

  • Aharonov's back from the future weak quantum measurements

    Updated: 2012-06-24 22:19:29
    Weak measurement From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Weak_measurement modified slightly by me in italic font Weak measurements are a type of quantum measurement, where the measured system is very weakly coupled to the measuring device. After the measurement the measuring device pointer is shifted by what is called the "weak value", so that a pointer initially pointing at zero before the measurement would point at the weak value after th...<img src="http://feeds.feedburner.com/~r/stardrive/GrxM/~4/xwuedDJoidg" height="1" width="1"/

  • Guests take a peek inside Tevatron experiments

    Updated: 2012-06-20 18:48:42
    In connection with a symposium celebrating the Tevatron, Fermilab scientists gave special tours of the collider's two experiments. A reporter from Naperville Community Television Channel 17 took the opportunity to visit the detectors and filed this report.

  • New “particle physics Bible” released

    Updated: 2012-06-19 16:10:15
    Every two years, the international Particle Data Group releases a new edition of The Review of Particle Physics. The 2012 edition, which runs over 1,400 pages long, was released online today.

  • New Berkeley paper on spontaneous symmetry breakdown in materials

    Updated: 2012-06-19 14:06:54
    It’ a difficult paper to understand fully. However, their main point seems to be that they have an algorithm for computing key properties like superconductivity of non-relativistic v/c << 1 Galilean relativity many-particle systems with spontaneous broken ground state symmetries. Unlike the special relativity case, the number of massless Goldstone bosons need not be equal to the number of broken symmetry Lie algebra generators dim G - dim H when G ---> G/H (coset space of degener...

  • BaBar data may hint at new physics

    Updated: 2012-06-18 15:17:38
    A new crack in the Standard Model may be starting to form. Recently analyzed data from the BaBar experiment show that one type of particle decay happens more often than predicted by the Standard Model.

  • Off the Charts: Largest Map of Dark Matter Across the Cosmos | DISCOVER Magazine


    Updated: 2012-06-17 14:40:00
    :

  • 99 things to do at TRIUMF physics laboratory

    Updated: 2012-06-15 16:00:34
    Over a couple of months in late 2011, the two communication interns, along with TRIUMF web publishing coordinator Jennifer Gagné, created “99 Things You Can Do At TRIUMF,” a video to give the non-initiated a peek into the lab life.

  • High-energy X-ray telescope lifts off

    Updated: 2012-06-14 22:33:35
    In a scene straight out of a James Bond film, NASA’s newest high-energy telescope launched into orbit yesterday after being dropped from the underbelly of a Lockheed airplane.

  • Beating the odds in the study of ultra-high-energy cosmic rays

    Updated: 2012-06-12 07:45:22
    It’s a mystery where ultra-high-energy cosmic rays come from and what they’re made of. But a new technique, currently in the works, could drastically improve scientists’ chances of finding out.

  • Dark Matter vs. Aether | Cosmic Variance

    Updated: 2012-06-08 17:35:18
    This is an easier one than dark matter vs. modified gravity. As mentioned, I’m going to be on Science Friday today, and they asked me to contribute a guest blog post, which I’m cross-posting below. Old news, I’m sure, for longtime CV readers, but here you go. ——————– Probably the biggest single misconception I come [...]

  • Neutrino velocity consistent with speed of light

    Updated: 2012-06-08 15:12:44
    Einstein can breathe a sigh of relief – neutrinos obey the cosmic speed limit after all.

  • Physicists demonstrate quantum interference between two photons of different frequencies

    Updated: 2012-06-07 14:50:02
    (Phys.org) -- When two photons simultaneously enter two input ports of a beam splitter, their paths interfere destructively, which causes the photons to simultaneously exit the beam splitter through the same output port. Because this quantum interference effect changes the input into a different output, it could have applications in quantum information processing. But whereas the two photons are usually identical in experiments demonstrating this effect, a new study has demonstrated that quantum interference can also occur between two photons with different frequencies, giving researchers an additional degree of control.

  • Does filamentary accretion of dark matter sub-halos naturally produce a VPOS-like structure?

    Updated: 2012-05-15 09:44:56
    SciLogs All Blogs Next Does filamentary accretion of dark matter sub-halos naturally produce a VPOS-like structure from Marcel S . Pawlowski 15. May 2012, 10:44 In the previous post we discussed the VPOS , the vast polar structure of satellite objects around the Milky Way . One of the suggested origins within the cosmological cold dark matter paradigm is that the satellites have been preferentially accreted along large , cosmic filaments . These are long , thread-like structures which arise naturally during the formation of structure in the cosmos . The movie below shows how they come : about One work suggesting that filamentary accretion can solve the VPOS-problem is Lovell et al . 2011 Its abstract claims that : All six haloes of the Aquarius simulations possess a population of subhaloes

  • The vast polar structure - VPOS - of satellite objects around the Milky Way

    Updated: 2012-04-28 22:54:24
    SciLogs All Blogs Next The vast polar structure VPOS of satellite objects around the Milky Way from Marcel S . Pawlowski 28. April 2012, 23:54 After the worrisome news for dark matter in the last weeks we have to add another today and there is more to come very soon This time , we show that the disc of satellite galaxies is only a part of a bigger structure : a vast polar structure VPOS of diverse satellite objects surrounds the Milky Way , unexpected from cosmological . models With the increasing resolution of cosmological simulations of structure and galaxy formation , it became possible to make predictions on smaller scales . In particular , it became apparent that the dark matter subhalos , typically identified as the sites of luminous satellite galaxies around a host galaxy , are more

  • Dark Matter gone missing in many places: a crisis of modern physics?

    Updated: 2012-04-19 20:41:31
    : SciLogs All Blogs Next Dark Matter gone missing in many places : a crisis of modern physics from Marcel S . Pawlowski 19. April 2012, 21:41 On The Dark Matter Crisis , we have already presented numerous problems that appear within the LCDM model of cosmology . Some of these have been given names , like the Missing Satellites Problem where LCDM predicts more dark matter subhaloes around the Milky Way than there are observed satellite galaxies , which are expected to trace them . Or the Missing Baryons Problem from cosmological predictions we expect a certain density in the baryonic , luminous and thus in principle observable matter . But when you add up all the visible matter you observed , you only get 10-40 per cent of what you expect . The larger fraction is missing . Even the ongoing

  • German TV tip: physics at the verge of collapse - science in the dark

    Updated: 2012-04-16 23:46:36
    A short TV-tip for our German readers: on April 17 (today) at 18:30 on 3sat"nano spezial" about fundamental problems of physics and cosmology, dark matter and dark energy. It is titled "Physik vor dem Kollaps - Die Wissenschaft steht im Dunkeln". It includes an interview with Pavel Kroupa. For those without TV: the programme can already be found online in the 3sat Mediathek and will be available for the next seven days.

  • Question D: What about the Bullet cluster? And what about the Train-Wreck cluster Abell 520?

    Updated: 2012-04-15 19:15:29
    : SciLogs All Blogs Next Question D : What about the Bullet cluster And what about the Train-Wreck cluster Abell 520 from Pavel Kroupa 15. April 2012, 20:15 : Summary One result is very definite by now : neither the Bullet nor the Train Wreck clusters support nor do they prove the existence of cold or warm dark matter . And , they certainly do not disprove MOND . Quite on the contrary , according to current knowledge , they falsify the concordance cosmological or LCDM . model The Bullet cluster consists of two clusters of galaxies that have penetrated each other leaving behind a slab of gas while the now seperating clusters retain matter as revealed through gravitational lensing . Assuming General Relativity GR to be valid t he lensing measurements tell us that collisionless dark matter

  • Question C.III: Fundamental theoretical problems

    Updated: 2012-03-31 14:25:26
    : SciLogs All Blogs Next Question C.III : Fundamental theoretical problems from Pavel Kroupa 31. March 2012, 15:25 Rather than being posted soon after II : MOND works far too well published on the 21.03.2011 a delay caused by internal university issues arose . We are back though , for the time being , with the originally advertised Question C.III : Fundamental theoretical problems this contribution To re-iterate : what is the purpose of this series on SciLogs We are aiming to document , within the time we have for such matters , the already noticeable paradigm shift away from a dark-matter dominated Einsteinian inflationary cosmology model to a different description which may , or may not , be fundamentally based on Einstein's GR theory . nbsp Continuing now with Qestion C.III : : Summary

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