Bulletin of the American Physical Society
Annual Meeting of the Four Corners Section of the APS
Volume 55, Number 9
Friday–Saturday, October 15–16, 2010; Ogden, Utah
Session H1: Astrophysics, Galaxies |
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Chair: Bradley Carroll, Weber State University Room: Ballroom C |
Saturday, October 16, 2010 9:00AM - 9:12AM |
H1.00001: OH-MASER Lines in Galaxy Merger Arp220 Derek Felli Arp220 is a radio emitting galaxy merger, meaning it consists of two galaxies colliding. We worked with interferometric data from the Arecibo 305m dish in Puerto Rico and eight other European telescopes to search for OH-MASER satellite lines in absorption. Such OH satellite lines are important in determining the physical characteristics of the galaxy merger. Using interferometric techniques allows for high resolution observations, which allowed us to map in great detail the continuum of Arp220. We observed many strong super nova remnants which others had previously noted. The search for absorption and emission lines is still ongoing, for which we present some candidates. [Preview Abstract] |
Saturday, October 16, 2010 9:12AM - 9:24AM |
H1.00002: Structures and Spectra at the Interface of the Heliosphere and Interstellar Medium: Energetic Neutral Atom (ENA) Sky Maps from the Interstellar Boundary Explorer Herbert Funsten, Frederic Allegrini, Geoff Crew, Robert DeMajistre, Priscilla Frisch, Stephen Fuselier, Michael Gruntman, Paul Janzen, David McComas, Eberhard Moebius, Daniel Reisenfeld, Edmond Roelof, Nathan Schwadron The Interstellar Boundary Explorer (IBEX) has obtained all-sky images of energetic neutral atoms (ENAs) emitted from the heliosheath, located between the termination shock of the solar wind and the local interstellar medium (LISM). The spectral variations over the energy range 0.3-6 keV in the ENA all-sky maps reveal an unexpected new picture of the outer boundary of the heliosphere, including the discovery of a circular ribbon of enhanced ENA emission, spectral features suggesting global ordering by heliospheric latitude, and a dominant role played by the non-thermal proton populations. The IBEX spectral measurements enable unprecedented insight into the underlying structure and dynamics of the heliosheath. [Preview Abstract] |
Saturday, October 16, 2010 9:24AM - 9:36AM |
H1.00003: Search for Galactic neutron sources with the Pierre Auger Observatory: correlations with x-ray binaries and supernova remnants David Thomas In this study the results are reported of searches, using data from the surface detector of the Pierre Auger Observatory, for potential Galactic neutron sources near objects in three catalogs: low mass x-ray binaries, high mass x-ray binaries, and supernova remnants. The search was performed in windows of $1^\circ$ increments from $1^\circ$ to $10^\circ$ around catalog objects in six energy ranges. The maximum excess found was $3.5 \sigma$ in the energy range 1.5 -- 2.5 EeV in a $3^\circ$ window around high mass x-ray binaries. The chance probability of finding an excess this large in this search is estimated to be 1\%. [Preview Abstract] |
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