Searching for High Energy Neutrino counterpart signals; The case of the Fermi Bubbles signal and of Dark Matter annihilation in the inner Galaxy

The recent uncovering of the \textit{Fermi} Bubbles/haze in the \textit{Fermi} gamma-ray data has generated theoretical work to explain such a signal of hard $\gamma$-rays in combination with the \textit{WMAP} haze signal. Many of these theoretical models can have distinctively different implications with regards to the production of high energy neutrinos. We discuss the neutrino signals from different models proposed for the explanation of the \textit{Fermi} Bubbles/haze, more explicitly, from Dark Matter annihilation in the galactic halo with conditions of preferential CR diffusion, from recent AGN jet activity, from periodic diffusive shock acceleration, from stochastic 2nd order Fermi acceleration and from long time-scale star formation in the galactic center in combination with strong galactic winds. We find that some of these models will be probed by the IceCube DeepCore detector. Moreover, with a km$^3$ telescope located at the north hemisphere, we will be able to discriminate between the hadronic, leptonic and the DM models. Additionally using the reconstructed neutrino spectra we will probe annihilation of TeV scale dark matter towards the galactic center.Comment: 15 pages, 10 figures, 1 table, changes in v2: in agreement with PRD version, small revisions in text, addition of table, conclusions unchange

Students’ Achievement In Developing Instructional Material Of Junior High School Mathematics In English Through Implementation Of Peer Assesment In Cooperative Setting

This research proposes that to study students’ achievement in developing the instructional material of Junior High School Mathematics in English through implementation of peer assessment in cooperative setting. The subject of this study are fifth semester students of Study Program of Mathematics Education, Malang State University, offering AY 2010/2011. Descriptive study is implemented in this study. The researcher analizes syllaby, lesson plan, worksheet, media, assessment, and scenario that developing by students for teaching mathematics in English. This research concludes that students’ achievement in developing instructional material of junior high school mathematics in English through implementation of peer assessment in cooperative setting is good.This research also found that students work cooperatively and appreciate each other during the teaching learning process in coooperative setting. Key words: instructional material, teaching mathematics in English, peer assesment, cooperativ

Spherical harmonics analysis of Fermi gamma-ray data and the Galactic dark matter halo

We argue that the decomposition of gamma-ray maps in spherical harmonics is a sensitive tool to study dark matter (DM) annihilation or decay in the main Galactic halo of the Milky Way. Using the spherical harmonic decomposition in a window excluding the Galactic plane, we show for one year of Fermi data that adding a spherical template (such as a line-of-sight DM annihilation profile) to an astrophysical background significantly reduces chi^2 of the fit to the data. In some energy bins the significance of this DM-like fraction is above three sigma. This can be viewed as a hint of DM annihilation signal, although astrophysical sources cannot be ruled out at this moment. We use the derived DM fraction as a conservative upper limit on DM annihilation signal. In the case of bb-bar annihilation channel the limits are about a factor of two less constraining than the limits from dwarf galaxies. The uncertainty of our method is dominated by systematics related to modeling the astrophysical background. We show that with one year of Fermi data the statistical sensitivity would be sufficient to detect DM annihilation with thermal freeze out cross section for masses below 100 GeV.Comment: 16 pages, 10 figures, 1 table; v2: minor corrections, v3: major revision of the presentation, results unchange

Searching for the continuum spectrum photons correlated to the 130 GeV gamma-ray line

Indications for a gamma-ray line(s) signal towards the Galactic center at an energy of about 130 GeV have been recently presented. While dark matter annihilations are a viable candidate for this signal, it is generally expected that such a flux would be correlated to a gamma-ray component with continuum energy spectrum due to dark matter pair annihilating into other Standard Model particles. We use the gamma-ray data from the inner 10 x 10 degree window to derive limits for a variety of DM annihilation final states. Extending the window of observation, we discuss bounds on the morphological shape of a dark matter signal associated to the line, applying both standard templates for the dark matter profile, such as an Einasto or a NFW profile, and introducing a new more general parametrization.Comment: 9 pages, 6 figures and 1 table, corrected typographical errors, added citations and journal referenc