today in particle astrophysics: 10/01/2008

Authors: A. De Rosa (1), P. Ubertini (1), R. Campana (2), A. Bazzano (1), A. J. Dean (3), L. Bassani (4) ((1)INAF/IASF-Roma, (2) University of Rome La Sapienza, (3) University of Southampton, (4) INAF/IASF-Bologna)

Constraints on WIMP Dark Matter from the High Energy PAMELA $\bar{p}/p$ data

Authors: F. Donato, D. Maurin, P. Brun, T. Delahaye, P. Salati

Dark Matter and Dark Radiation

Authors: Lotty Ackerman, Matthew R. Buckley, Sean M. Carroll, Marc Kamionkowski

Authors: J. Gorosabel (1), A. de Ugarte Postigo (2), A.J. Castro-Tirado (1), I. Agudo (1), M. Jelinek (1), S. Leon (3), T. Augusteijn (4), J.P.U. Fynbo (5), J. Hjorth (5), M.J. Michalowski (5), D. Xu (5), P. Ferrero (6), D.A. Kann (6), S. Klose (6), A. Rossi (6), J.P. Madrid (7), A. LLorente (8), M. Bremer (9), J.-M. Winters (9) ((1) Instituto de Astrofisica de Andalucia (CSIC), Granada, Spain. (2) ESO, Chile. (3) IRAM, Granada, Spain. (4) NOT, La Palma, Spain. (5) DARK, Denmark. (6) TLS, Tautenburg, Germany. (7) McMaster University, Canada. (8) Herschel Science Operations Centre, Madrid, Spain. (9) IRAM, France)

tipa -- 10/24/2008

A low-frequency radio halo associated with a cluster of galaxies

Authors: G. Brunetti, S. Giacintucci, R. Cassano, W. Lane, D. Dallacasa, T. Venturi, N. Kassim, G. Setti, W.D. Cotton, M. Markevitch

tipa -- 10/23/2008

Nucleosynthesis in Electron Capture Supernovae of AGB Stars

Authors: S. Wanajo, K. Nomoto, H. -Th. Janka, F. S. Kitaura, B. Mueller

Radiative cooling in relativistic collisionless shocks. Can simulations and experiments probe relevant GRB physics?

Authors: Mikhail V. Medvedev (KU), Anatoly Spitkovsky (Princeton)

tipa -- 10/22/2008

Old-Population Hypervelocity Stars from the Galactic Center: Limits from the SDSS

Authors: Juna A. Kollmeier (1), Andrew Gould (2), Gillian Knapp (3), Timothy C. Beers (4) ((1) Carnegie Observatories, (2) The Ohio State University, (3) Princeton University, (4) Michigan State University)

Alas, the dark matter structures were not that trivial

Authors: Kasper B. Schmidt, Steen H. Hansen, Andrea V. Maccio'

On the Origin of the 511 keV Emission in the Galactic Centre

Authors: Reba M. Bandyopadhyay (Univ. of Florida), Joseph Silk (Oxford), James E. Taylor (Univ. of Waterloo), Thomas J. Maccarone (Southampton)

Fossil remnants of reionization in the halo of the Milky Way

Authors: P. Madau, M. Kuhlen, J. Diemand, B. Moore, M. Zemp, D. Potter, J. Stadel

Oscillation and Future Detection of Failed Supernova Neutrinos from Black Hole Forming Collapse

Authors: Ken'ichiro Nakazato, Kohsuke Sumiyoshi, Hideyuki Suzuki, Shoichi Yamada

X-ray studies of HESS J1837--069 with Suzaku and ASCA: a VHE gamma-ray source originated from the pulsar wind nebula

Authors: Takayasu Anada, Ken Ebisawa, Tadayasu Dotani, Aya Bamba (ISAS/JAXA)

Multi-Tev Gamma-Ray Observation from the Crab Nebula Using the Tibet-III Air Shower Array Finely Tuned by the Cosmic-Ray Moon's Shadow

Authors: M. Amenomori, et al (The Tibet AS Gamma Collaboration)

The SNO+ Experiment

Authors: Mark C. Chen, for the SNO+ collaboration

Recent Progress in Formal Theory

Authors: Joseph Polchinski

tipa -- 10/21/2008

Early Annihilation and Diffuse Backgrounds in 1/v WIMP models

Authors: Marc Kamionkowski (Caltech), Stefano Profumo (UC Santa Cruz)

Inspiralling Supermassive Black Holes: A New Signpost for Galaxy Mergers

Authors: Julia M. Comerford, Brian F. Gerke, Jeffrey A. Newman, Marc Davis, Renbin Yan, Michael C. Cooper, S.M. Faber, David C. Koo, Alison L. Coil, D.J. Rosario

Limits on an Energy Dependence of the Speed of Light from a Flare of the Active Galaxy PKS 2155-304

Authors: H.E.S.S. Collaboration: F. Aharonian, et al.

First Results from the PAMELA Space Mission

Authors: M. Boezio, V. Bonvicini, G. Jerse, E. Mocchiutti, A. Vacchi, G. Zampa, N. Zampa, O. Adriani, M. Bongi, L. Bonechi, S. Bottai, D. Fedele, P. Papini, S. B. Ricciarini, P. Spillantini, E. Taddei, E. Vannuccini, G. C. Barbarino, D. Campana, R. Carbone, G. Osteria, G. A. Bazilevskaya, A. N. Kvashnin, Y. I. Stozhkov, R. Bellotti, A. Bruno, F. Cafagna, E. A. Bogomolov, S. Y. Krutkov, G. Vasilyev, S. Borisov, M. Casolino, M. P. De Pascale, N. De Simone, V. Di Felice, V. Malvezzi, L. Marcelli, N. Nikonov, P. Picozza, R. Sparvoli, P. Carlson, P. Hofverberg, S. Orsi, M. Pearce, G. Castellini, A. M. Galper, L. Grishantseva, A. Leonov, S. V. Koldashov, V. V. Mikhailov, S. A. Voronov, Y. T. Yurkin, V. G. Zverev, W. Menn, M. Simon, M. Ricci

MAGIC upper limits on the VHE gamma-ray emission from the satellite galaxy Willman 1

Authors: MAGIC Collaboration: E. Aliu, et al

The Fermi Gamma Ray Space Telescope discovers the Pulsar in the Young Galactic Supernova-Remnant CTA 1

Authors: The Fermi LAT Collaboration: G. Kanbach, K. Wood, M. Ziegler, et al

Recent Results from KamLAND

Authors: Koichi Ichimura, for the KamLAND Collaboration

tipa -- 10/20/2008

Cosmic Analogues of the Stern-Gerlach Experiment and the Detection of Light Bosons

Authors: Doron Chelouche, Eduardo I. Guendelman

Cosmological Inflation: Theory and Observations

Authors: Daniel Baumann (Harvard), Hiranya V. Peiris (Cambridge)

tipa -- 10/17/2008

TeV Gamma Rays from Geminga and the Origin of the GeV Positron Excess

Authors: Hasan Yuksel (Bartol Res. Inst., U. of Delaware), Matthew D. Kistler (Ohio State University), Todor Stanev (Bartol Res. Inst., U. of Delaware)

The Destruction of Thin Stellar Disks Via Cosmologically Common Mergers

Authors: Chris W. Purcell (UC Irvine), Stelios Kazantzidis (CCAPP/OSU), James S. Bullock (UC Irvine)

Proving Inflation: A Bootstrap Approach

Authors: Latham Boyle (CITA), Paul J. Steinhardt (Princeton)

Discovery of a very highly extinguished supernova in a luminous infrared galaxy

Authors: E. Kankare, S. Mattila, S. Ryder, M.-A. Perez-Torres, A. Alberdi, C. Romero-Canizales, T. Diaz-Santos, P. Vaisanen, A. Efstathiou, A. Alonso-Herrero, L. Colina, J. Kotilainen

Propagation and Source Energy Spectra of Cosmic-Ray Nuclei at High Energies

Authors: M. Ave, P.J. Boyle, C. Hoeppner, J. Marshall, D. Muller

tipa -- 10/16/2008

Neutron-Rich Freeze-Out in Viscously Spreading Accretion Disks Formed from Compact Object Mergers

Authors: B. D. Metzger, A. L. Piro, E. Quataert

The Star Formation Law in Nearby Galaxies on Sub-Kpc Scales

Authors: Frank Bigiel (1), Adam Leroy (1), Fabian Walter (1), Elias Brinks (2), W.J.G. de Blok (3), Barry Madore (4), Michele D. Thornley (5) ((1) MPI f. Astronomy; (2) Univ. of Hertfordshire; (3) Univ. of Cape Town; (4) Carnegie Observatories; (5) Bucknell Univ.)

Time evolution of the line emission from the inner circumstellar ring of SN 1987A and its hot spots

Authors: Per Groeningsson, Claes Fransson, Bruno Leibundgut, Peter Lundqvist, Peter Challis, Roger A. Chevalier, Jason Spyromilio

Discovery of gamma-ray emission from the shell-type supernova remnant RCW 86 with H.E.S.S

Authors: HESS Collaboration: F. Aharonian, et al

Prospects of neutrino oscillation measurements in the detection of reactor antineutrinos with a medium-baseline experiment

Authors: Mikhail Batygov, Stephen Dye, John Learned, Shigenobu Matsuno, Sandip Pakvasa, Gary Varner

tipa -- 10/15/2008

GRB 080913 at redshift 6.7

Authors: J. Greiner, T. Kruehler, J.P.U. Fynbo, A. Rossi, R. Schwarz, S. Klose, S. Savaglio, N.R. Tanvir, S. McBreen, T. Totani, B.B. Zhang, X.F. Wu, D. Watson, S.D. Barthelmy, A.P. Beardmore, P. Ferrero, N. Gehrels, D.A. Kann, N. Kawai, A. Kuepcue Yoldas, P. Meszaros, B. Milvang-Jensen, S.R. Oates, D. Pierini, P. Schady, K. Toma, P.M. Vreeswijk, A. Yoldas, B. Zhang, P. Afonso, K. Aoki, D.N. Burrows, C. Clemens, R. Filgas, Z. Haiman, D.H. Hartmann, G. Hasinger, J. Hjorth, E. Jehin, A.J. Levan, E.W. Liang, D. Malesani, T.-S. Pyo, S. Schulze, G. Szokoly, H. Terada, K. Wiersema

Gamma-Ray Burst at the extreme: "the naked-eye burst" GRB 080319B

Authors: P.R. Wozniak, W.T. Vestrand, A.D. Panaitescu, J.A. Wren, H.R. Davis, R.R. White (Los Alamos National Laboratory)

Constraints to Energy Spectra of Blazars based on Recent EBL Limits from Galaxy Counts

Authors: F. Krennrich, E. Dwek, A. Imran

tipa -- 10/14/2008

Core-Collapse Astrophysics with a Five-Megaton Neutrino Detector

Authors: Matthew D. Kistler, Hasan Yuksel (Ohio State), Shin'ichiro Ando (Caltech), John F. Beacom (Ohio State), Yoichiro Suzuki (Tokyo)

Solar Energetic Particle Spectrum on 13 December 2006 Determined by IceTop

Authors: R. Abbasi, for the IceCube Collaboration

Detection of the ultra-high z short GRB 080913 and its implications on progenitors and energy extraction mechanisms

Authors: D. Perez-Ramirez, A. de Ugarte Postigo, J. Gorosabel, M. A. Aloy, M. A. Guerrero, J. P. Osborne, K. L. Page, R. S. Warwick, I. Horvath, P. Veres, M. Jelinek, P. Kubanek, S. Guziy, M. Bremer, J. M. Winters, A. J. Castro-Tirado

tipa -- 10/13/2008

Implications of Ultra-High-Energy Cosmic Rays for Transient Sources in the Auger Era

Authors: Kohta Murase, Hajime Takami

Expanding Ejecta in the Oxygen-Rich Supernova Remnant G292.0+1.8: Direct Measurement through Proper Motions

Authors: P. Frank Winkler, Karl Twelker, Claudine N. Reith, Knox S. Long

tipa -- 10/10/2008

The Mass and Radius of the Neutron Star in EXO 1745-248

Authors: Feryal Ozel, Tolga Guver, Dimitrios Psaltis (University of Arizona)

Pulsars as the Sources of High Energy Cosmic Ray Positrons

Authors: Dan Hooper, Pasquale Blasi, Pasquale Dario Serpico

X-Ray Observation of Very High Energy Gamma-Ray Source, HESS J1745-303, with Suzaku

Authors: Aya Bamba (1), Ryo Yamazaki (2), Kazunori Kohri (3), Hironori Matsumoto (4), Stefan Wagner (5), Gerd Puehlhofer (5), Karl Kosack (6) ((1) ISAS/JAXA, (2) Hiroshima U., (3) Lancaster U., (4) Kyoto U., (5) LSW, (6) MPIK)

On the Origin of TeV Gamma-ray Emission from HESS J1834-087

Authors: R. Mukherjee, E. V. Gotthelf, J. P. Halpern

Pulsar Timing for the Fermi Gamma-ray Space Telescope

Authors: D. A. Smith, L. Guillemot, F. Camilo, I. Cognard, D. Dumora, C. Espinoza, P. C. C. Freire, E. V. Gotthelf, A. K. Harding, G. B. Hobbs, S. Johnston, V. M. Kaspi, M. Kramer, M. A. Livingstone, A. G. Lyne, R. N. Manchester, F. E. Marshall, M. A. McLaughlin, A. Noutsos, S. M. Ransom, M. S. E. Roberts, R. W. Romani, B. W. Stappers, G. Theureau, D. J. Thompson, S. E. Thorsett, N. Wang, P. Weltevrede

Probing the radio to X-ray connection of the Vela X PWN with Fermi LAT and t H.E.S.S

Authors: O. C. de Jager, P. O. Slane, S. LaMassa

tipa -- 10/9/2008

High-Resolution Timing Observations of Spin-Powered Pulsars with the AGILE Gamma-Ray Telescope

Authors: A. Pellizzoni, M. Pilia, A. Possenti, F. Fornari, P. Caraveo, E. Del Monte, S. Mereghetti, M. Tavani, A. Argan, A. Trois, M. Burgay, A. Chen, I. Cognard, E. Costa, N. D'Amico, P. Esposito, Y. Evangelista, M. Feroci, F. Fuschino, A. Giuliani, J. Halpern, G. Hobbs, A. Hotan, S. Johnston, M. Kramer, F. Longo, R. N. Manchester, M. Marisaldi, J. Palfreyman, P. Weltevrede, G. Barbiellini, F. Boffelli, A. Bulgarelli, P. W. Cattaneo, V. Cocco, F. D'Ammando, G. De Paris, G. Di Cocco, I. Donnarumma, M. Fiorini, T. Froysland, M. Galli, F. Gianotti, A. Harding, C. Labanti, I. Lapshov, F. Lazzarotto, P. Lipari, F. Mauri, A. Morselli, L. Pacciani, F. Perotti, P. Picozza, M. Prest, G. Pucella, M. Rapisarda, A. Rappoldi, P. Soffitta, M. Trifoglio, E. Vallazza, S. Vercellone, V. Vittorini, A. Zambra, et al. (7 additional authors not shown)

On the birthrates of Galactic neutron stars

Authors: E. F. Keane, M. Kramer (Jodrell Bank Centre for Astrophysics, University of Manchester)

SN 2001em: Not so Fast

Authors: F.K. Schinzel, G.B. Taylor, C.J. Stockdale, J. Granot, E. Ramirez-Ruiz

The Gamma-Ray-Flux Probability Distribution Function from Galactic Halo Substructure

Authors: Samuel K. Lee, Shin'ichiro Ando, Marc Kamionkowski

tipa -- 10/8/2008

Broken Symmetries

tipa -- 10/7/2008

The Highly Unusual Chemical Composition of the Hercules Dwarf Spheroidal Galaxy

Authors: A. Koch, A. McWilliam, E.K. Grebel, D.B Zucker, V. Belokurov

HVS7: a chemically peculiar hyper-velocity star

Authors: N. Przybilla (1), M. F. Nieva (1,2), A. Tillich (1), U. Heber (1), K. Butler (3), W. R. Brown (4) ((1) Dr. Remeis-Observatory Bamberg, (2) MPI for Astrophysics Garching, (3) University Observatory Munich, (4) Smithsonian Astrophysical Observatory)

Hadronic versus leptonic origin of the gamma-ray emission from Supernova Remnant RX J1713.6-3946

Authors: E.G. Berezhko (1), H.J. Völk (2) ((1) Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy) ((2) Max Planck Institut für Kernphysik)

tipa -- 10/6/2008

SN 2006gy: was it really extra-ordinary?

Authors: I. Agnoletto, S. Benetti, E. Cappellaro, L. Zampieri, M. Turatto, P. Mazzali, A. Pastorello, M. Della Valle, F. Bufano, A. Harutyunyan, H. Navasardyan, N. Elias-Rosa, S. Taubenberger, S. Spiro, S. Valenti

Recent Results from Super-Kamiokande

Authors: H. Sekiya, for the Super-Kamiokande Collaboration

Recent $\nu$s from IceCube

Authors: Spencer R. Klein, for the IceCube Collaboration

The polarized gluon contribution to the proton spin from the double helicity asymmetry in inclusive pi^0 production in polarized p+p collisions at sqrt(s)=200 GeV

Authors: PHENIX Collaboration: A. Adare, et al

tipa -- 10/3/2008

A planetary nebula around nova V458 Vul undergoing flash ionization

Authors: R. Wesson, M. J. Barlow, R. L. M. Corradi, J. E. Drew, P. J. Groot, C. Knigge, D. Steeghs, B. T. Gaensicke, R. Napiwotzki, P. Rodriguez-Gil, A. A. Zijlstra, M. F. Bode, J. J. Drake, D. J. Frew, E. A. Gonzalez-Solares, R. Greimel, M. J. Irwin, L. Morales-Rueda, G. Nelemans, Q. A. Parker, S. E. Sale, J. L. Sokoloski, A. Somero, H. Uthas, N. A. Walton, B. Warner, C. A. Watson, N. J. Wright

Deep MERLIN 5GHz Radio Imaging of Supernova Remnants in the M82 Starburst

Authors: D. M. Fenech, T. W. B. Muxlow, R. J. Beswick, A. Pedlar, M. K. Argo

All-sky LIGO Search for Periodic Gravitational Waves in the Early S5 Data

Authors: LIGO Scientific Collaboration

tipa -- 10/2/2008

Discovery of High-Energy Gamma-Ray Pulsations from PSR J2021+3651 with AGILE

Authors: J. P. Halpern, F. Camilo, A. Giuliani, E. V. Gotthelf, M. A. McLaughlin, R. Mukherjee, A. Pellizzoni, S. M. Ransom, M. S. E. Roberts, M. Tavani

Tools for Dissecting Supernova Remnants Observed with Chandra: Methods and Application to the Galactic Remnant W49B

Authors: Laura A. Lopez (1,2), Enrico Ramirez-Ruiz (1), David A. Pooley (3), Tesla E. Jeltema (4) ((1) University of California, Santa Cruz; (2) NSF Graduate Research Fellow; (3) University of Wisconsin, Madison; (4) UCO/Lick)

The effect of progenitor age and metallicity on luminosity and 56Ni yield in Type Ia supernovae