today in particle astrophysics

tipa -- 11/6/2008

The Anisotropic Spatial Distribution of Hypervelocity Stars

Authors: Warren R. Brown (1), Margaret J. Geller (1), Scott J. Kenyon (1), Benjamin C. Bromley (2) ((1) Smithsonian Astrophysical Observatory (2) University of Utah)

Pairing of Supermassive Black Holes in unequal-mass galaxy mergers

Authors: Simone Callegari (Univ. Zurich), Lucio Mayer (Univ. & ETH Zurich), Stelios Kazantzidis (OSU/CCAPP), Monica Colpi (Univ. Milano-Bicocca), Fabio Governato (Univ. Washington), Thomas Quinn (Univ. Washington), James Wadsley (McMaster Univ.)

Parity violation constraints using 2006-2007 QUaD CMB polarization spectra

Authors: QUaD Collaboration: E. Y. S. Wu (1), P. Ade (2), J. Bock (3 and 4), M. Bowden (1 and 5), M. L. Brown (6), G. Cahill (7), P. G. Castro (8 and 9), S. Church (1), T. Culverhouse (10), R. Friedman (10), K. Ganga (11), W. K. Gear (2), S. Gupta (2), J. Hinderks (1), J. Kovac (3), A. E. Lange (3), E. Leitch (3 and 4), S. J. Melhuish (12), Y. Memari (9), A. N. Taylor (9), J. A. Murphy (7), A. Orlando (3 and 2), L. Piccirillo (12), C. Pryke (10), N. Rajguru (2), B. Rusholme (1), R. Schwarz (10), C. O'Sullivan (7), K. L. Thompson (1), A. H. Turner (2), M. Zemcov (4 3 and 2) ((1) Kavli Institute for Particle Astrophysics and Cosmology and Department of Physics, Stanford University, (2) School of Physics and Astronomy, Cardiff University, (3) California Institute of Technology, (4) Jet Propulsion Laboratory, (5) School of Physics and Astronomy, Cardiff University, (6) Cavendish Laboratory, University of Cambridge, (7) Department of Experimental Physics, National University of Ireland Maynooth, (8) CENTRA, Departamento de Fisica, Universidade Tecnica de Lisboa, (9) Institute for Astronomy, University of Edinburgh, (10) Kavli Institute for Cosmological Physics, Department of Astronomy & Astrophysics, Enrico Fermi Institute, University of Chicago, (11) Laboratoire APC/CNRS, Batiment Condorcet, (12) School of Physics and Astronomy, University of Manchester)

First Study of Neutron Tagging with a Water Cherenkov Detector

Authors: Hideki Watanabe, Haibing Zhang (The Super-Kamiokande Collaboration)

tipa -- 11/5/2008

HD 271791: An Extreme Supernova Runaway B Star Escaping from the Galaxy

Authors: Norbert Przybilla (1), Maria-Fernanda Nieva (1,2), Ulrich Heber (1), Keith Butler (3) ((1) Dr. Remeis-Observatory Bamberg, (2) MPI for Astrophysics Garching, (3) University Observatory Munich)

Mass loss from hot massive stars

Authors: J. Puls, J. S. Vink, F. Najarro

The Spectral Shape and Photon Fraction as Signatures of the GZK-Cutoff

Authors: Andrew M. Taylor, Felix A. Aharonian

tipa -- 11/4/2008

A Second Case of Variable Na I D Lines in a Highly-Reddened Type Ia Supernova

Authors: S. Blondin (1,2), J. L. Prieto (3), F. Patat (1), P. Challis (2), M. Hicken (2), R. P. Kirshner (2), T. Matheson (4), M. Modjaz (5) ((1) ESO, (2) Harvard-Smithsonian CfA, (3) Ohio State University, (4) NOAO, (5) UC Berkeley)

The Atomic to Molecular Transition in Galaxies. II: HI and H_2 Column Densities

Authors: Mark R. Krumholz, Christopher F. McKee, Jason Tumlinson

The minimum stellar metallicity observable in the Galaxy

Authors: Anna Frebel, Jarrett L. Johnson, Volker Bromm

The Sub-parsec Scale Radio Properties of Southern Starburst Galaxies. II. Supernova Remnants, the Supernova Rate, and the Ionised Medium in the NGC 4945 Starburst

Authors: E. Lenc, S. J. Tingay

Search for Charged Current Coherent Pion Production on Carbon in a Few-GeV Neutrino Beam

Authors: SciBooNE Collaboration: K. Hiraide, et al

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

tipa -- 10/29/2008

Improved Standardization of Type II-P Supernovae: Application to an Expanded Sample

Authors: Dovi Poznanski, Nathaniel Butler, Alexei V. Filippenko, Mohan Ganeshalingam, Weidong Li, Joshua S. Bloom, Ryan Chornock, Ryan J. Foley, Peter E. Nugent, Jeffrey M. Silverman, S. Bradley Cenko, Elinor L. Gates, Douglas C. Leonard, Adam A. Miller, Maryam Modjaz, Frank J. D. Serduke, Nathan Smith, Brandon J. Swift, Diane S. Wong

A new measurement of the antiproton-to-proton flux ratio up to 100 GeV in the cosmic radiation

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

Observation of an anomalous positron abundance in the cosmic radiation

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

Tycho Brahe's 1572 supernova as a standard type Ia explosion revealed from its light echo spectrum

Authors: Oliver Krause, Masaomi Tanaka, Tomonori Usuda, Takashi Hattori, Miwa Goto, Stephan Birkmann, Ken'ichi Nomoto

Hanohano: A Deep Ocean Anti-Neutrino Detector for Unique Neutrino Physics and Geophysics Studies

Authors: John G. Learned, Stephen T. Dye, Sandip Pakvasa

tipa -- 10/28/2008

Non-linear Study of Bell's Cosmic Ray Current-driven Instability

Authors: Mario A. Riquelme, Anatoly Spitkovsky (Princeton)

Discovery of a very high energy gamma-ray signal from the 3C 66A/B region

Authors: MAGIC Collaboration: E. Aliu, et al

Disentangling Neutrino Oscillations

Authors: Andrew G. Cohen, Sheldon L. Glashow, Zoltan Ligeti

On the possible causes of a rise with energy of the cosmic ray positron fraction

Authors: Pasquale Dario Serpico

Physics of the ALICE experiment at the LHC

Authors: A.A. Isayev

tipa -- 10/27/2008

Simultaneous polarization monitoring of SN2007uy and the axisymmetric SN2008D/XRF080109: isolating geometry from dust

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