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Long Gamma Ray Bursts
(Preview)
Title: Close Binary Progenitors of Long Gamma Ray Bursts Authors: M.V. Barkov, S.S. Komissarov The strong dependence of the neutrino annihilation mechanism on the mass accretion rate makes it difficult to explain the LGRBs with duration in excess of 100 seconds as well as the precursors separate...
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Coalescing Black Hole-Neutron Star Binaries
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Title: The Black Hole Remnant of Black Hole-Neutron Star Coalescing Binaries Authors: Francesco Pannarale We present a model for determining the dimensionless spin parameter and mass of the black hole remnant of black hole-neutron star mergers with parallel orbital angular momentum and initi...
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PMN J0948+0022
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Title: Fermi/LAT discovery of gamma-ray emission from a relativistic jet in the narrow-line quasar PMN J0948+0022 Authors: The Fermi/LAT Collaboration: A.A. Abdo, et al., G. Ghisellini, L. Maraschi, F. Tavecchio, E. Angelakis We report the discovery by the Large Area Telescope (LAT) onboard t...
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IC 3418
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Astronomers Discover Star-Studded Galaxy Tail NASA's Galaxy Evolution Explorer has discovered a galaxy tail studded with bright knots of new stars. The tail, which was created as the galaxy IC 3418 plunged into the neighbouring Virgo cluster of galaxies, offers new insight into how stars form. C...
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HE 1104-1805
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Hubble Directly Observes the Disc Around a Black Hole A team of scientists has used the NASA/ESA Hubble Space Telescope to observe a quasar accretion disc - a brightly glowing disc of matter that is slowly being sucked into its galaxys central black hole. Their study makes use of a novel technique tha...
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BAL QSOs
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Title: Deep GEMINI GMOS-IFU spectroscopy of BAL QSOs: I. Decoupling the BAL, QSO, starburst, NLR, and supergiant bubbles in Mrk 231
Authors: S. Lipari, S.F. Sanchez, M. Bergmann, R. Terlevich, B. Garcia-Lorenzo, B. Punsly, E. Mediavilla, Y. Taniguchi, M. Ajiki, W. Zheng, J. Ac...
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MACSJ0717.5+3745
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The most crowded collision of galaxy clusters has been identified by combining information from three different telescopes. This result gives scientists a chance to learn what happens when some of the largest objects in the Universe go at each other in a cosmic free-for-all. Using data from NASA'...
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LOPES
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A small prototype array in Germany has detected several radio flashes from cosmic rays that smack into the Earth’s upper atmosphere.
A larger array, with more of these low-cost radio antennas, could help astrophysicists decipher the mystery behind the highest energy cosmic rays.
Cosmic ray...
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4U 1636-53
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[url=http://www.nasa.gov/centers/goddard/news/topstory/2008/timing_me...
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QQQ J1519+0627
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Title: Caught in the Act: Discovery of a Physical Quasar Triplet Authors: E. P. Farina, C. Montuori, R. Decarli, M. Fumagalli We present the discovery of a triplet of quasars at z~1.51. The whole system is well accommodated within 25 arcsec (i.e., 200 kpc in projected distance). The velocity differ...
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IGR J12319-0749
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Title: IGR J12319-0749: evidence for another extreme blazar found with INTEGRAL Authors: L. Bassani, R. Landi, F. E. Marshall, A. Malizia, A. Bazzano, A. J. Bird, N. Gehrels, P. Ubertini, N. Masetti We report on the identification of a new soft gamma-ray source, IGR J12319-0749, detected with the...
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Draco Dwarf Spheroidal Galaxy
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Title: The Variable Stars of the Draco Dwarf Spheroidal Galaxy - Revisited Authors: K. Kinemuchi, H.C. Harris, Horace A. Smith, N.A. Silbermann, L.A. Snyder, A. P. LaCluyze, C.L. Clark We present a CCD survey of variable stars in the Draco dwarf spheroidal galaxy. This survey, which has the larges...
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Intense star birth
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'Nuisance' data lead to surprising star-birth discovery When a batch of bright cosmic objects first appeared in maps in 2008 made with data from the South Pole Telescope, astronomers at the University of Chicago's Kavli Institute for Cosmological Physics regarded it only as an unavoidable nuisa...
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Black Hole Jets
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Study Reveals a Remarkable Symmetry in Black Hole Jets Black holes range from modest objects formed when individual stars end their lives to behemoths billions of times more massive that rule the centers of galaxies. A new study using data from NASA's Swift satellite and Fermi Gamma-ray Space Tele...
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Abell 68
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Gravitational Lens Creates Cartoon of Space Invader The universe is eerie enough without giving us an apparition of a 1980s video game alien attacker. This oddball-looking object is really a mirage created by the gravitational field of a foreground cluster of galaxies warping space and distorti...
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