Now showing items 1-20 of 62

    • 2 mm GISMO Observations of the Galactic Center. I. Dust Emission 

      Arendt, Richard G; Staguhn, Johannes; Dwek, Eli; Morris, Mark R; Yusef-Zadeh, Farhad; Benford, Dominic J; Kovacs, Attila; Gonzalez-Quiles, Junellie (The American Astronomical Society, 2019-11-01)
      The Central Molecular Zone (CMZ), covering the inner ∼ 1 ◦ of the Galactic plane has been mapped at 2 mm using the GISMO bolometric camera on the 30 m IRAM telescope. The 2100 resolution maps show abundant emission from ...
    • 2 mm GISMO Observations of the Galactic Center. II. A Nonthermal Filament in the Radio Arc and Compact Sources 

      Staguhn, Johannes; Arendt, Richard G; Dwek, Eli; Morris, Mark R; Yusef-Zadeh, Farhad; Benford, Dominic J; Kovacs, Attila; Gonzalez-Quiles, Junellie (The American Astronomical Society, 2019-11-01)
      We have used the Goddard IRAM 2-Millimeter Observer (GISMO) with the 30 m IRAM telescope to carry out a 2 mm survey of the Galaxy’s central molecular zone (CMZ). These observations detect thermal emission from cold ISM ...
    • The Accretion History of AGN: A Newly Defined Population of Cold Quasars 

      Kirkpatrick, Allison; Urry, C. Megan; Brewster, Jason; Cooke, Kevin C.; Estrada, Michael; Glikman, Eilat; Hamblin, Kurt; Ananna, Tonima Tasnim; Carlile, Casey; Coleman, Brandon; Johnson, Jordan; Kartaltepe, Jeyhan S.; LaMassa, Stephanie M.; Marchesi, Stefano; Powell, Meredith; Sanders, Dave; Treister, Ezequiel; Turner, Tracey Jane (2019-08-15)
      Quasars are the most luminous of active galactic nuclei (AGN), and are perhaps responsible for quenching star formation in their hosts. The Stripe 82X catalog covers 31.3 deg² of the Stripe 82 field, of which the 15.6 deg² ...
    • CALET upper limits on GeV-energy gamma-ray burst emission 

      Cannady, Nicholas (2019-07-24)
      The CALorimetric Electron Telescope (CALET) was deployed on the International Space Station in October 2015 and has accumulated over three years of continuous data to date. The calorimeter (CAL) is sensitive to gamma rays ...
    • A COMPACT TWO-STEP LASER TIME-OF-FLIGHT MASS SPECTROMETER FOR IN SITU ANALYSIS OF PLANETARY SURFACES 

      Getty, Stephanie A.; Brinckerhoff, William B.; Cornish, Timothy J.; Grubisic, Andrej; Li, Xiang; Uckert, Kyle (2015-09-16)
    • A Decade of Gamma-Ray Bursts Observed by Fermi-LAT: The Second GRB Catalog 

      Ajello, M.; Arimoto, M.; Axelsson, M.; Baldini, L.; Barbiellini, G.; Bastieri, D.; Bellazzini, R.; Bhat, P. N.; Bissaldi, E.; Blandford, R. D.; Bonino, R.; Bonnell, J.; Bottacini, E.; Bregeon, J.; Bruel, P.; Buehler, R.; Cameron, R. A.; Caputo, R.; Caraveo, P. A.; Cavazzuti, E.; Chen, S.; Cheung, C. C.; Chiaro, G.; Ciprini, S.; Costantin, D.; Crnogorcevic, M.; Cutini, S.; Dainotti, M.; D’Ammando, F.; Luque, P. de la Torre; Palma, F. de; Desai, A.; Desiante, R.; Lalla, N. Di; Venere, L. Di; Dirirsa, F. Fana; Fegan, S. J.; Franckowiak, A.; Fukazawa, Y.; Funk, S.; Fusco, P.; Gargano, F.; Gasparrini, D.; Giglietto, N.; Giordano, F.; Giroletti, M.; Green, D.; Grenier, I. A.; Grove, J. E.; Guiriec, S.; Hays, E.; Hewitt, J. W.; Horan, D.; Jóhannesson, G.; Kocevski, D.; Kuss, M.; Latronico, L.; Li, J.; Longo, F.; Loparco, F.; Lovellette, M. N.; Lubrano, P.; Maldera, S.; Manfreda, A.; Martí-Devesa, G.; Mazziotta, M. N.; Mereu, I.; Meyer, M.; Michelson, P. F.; Mirabal, N.; Mitthumsiri, W.; Mizuno, T.; Monzani, M. E.; Moretti, E.; Morselli, A.; Moskalenko, I. V.; Negro, M.; Nuss, E.; Ohno, M.; Omodei, N.; Orienti, M.; Orlando, E.; Palatiello, M.; Paliya, V. S.; Paneque, D.; Persic, M.; Pesce-Rollins, M.; Petrosian, V.; Piron, F.; Poolakkil, S.; Poon, H.; Porter, T. A.; Principe, G.; Racusin, J. L.; Rainò, S.; Rando, R.; Razzano, M.; Razzaque, S.; Reimer, A.; Reimer, O.; Reposeur, T.; Ryde, F.; Serini, D.; Sgrò, C.; Siskind, E. J.; Sonbas, E.; Spandre, G.; Spinelli, P.; Suson, D. J.; Tajima, H.; Takahashi, M.; Tak, D.; Thayer, J. B.; Torres, D. F.; Troja, E.; Valverde, J.; Veres, P.; Vianello, G.; Kienlin, A. von; Wood, K.; Yassine, M.; Zhu, S.; Zimmer, S. (The American Astronomical Society, 2019-06-10)
      The Large Area Telescope (LAT) aboard the Fermi spacecraft routinely observes high-energy emission from gamma-ray bursts (GRBs). Here we present the second catalog of LAT-detected GRBs, covering the first 10 yr of operations, ...
    • A deep X-ray view of the bare AGN Ark 120 VI. Geometry of the hot corona from spectroscopic and polarization signatures 

      Marinucci, A.; Porquet, D.; Tamborra, F.; Bianchi, S.; Braito, V.; Lobban, A.; Marin, F.; Matt, G.; Middei, R.; Nardini, E.; Reeves, J.; Tortosa, A. (ESO, 2018-11-30)
      Context. The spectral shape of the hard X-ray continuum of active galactic nuclei (AGN) can be ascribed to inverse Compton scattering of optical/UV seed photons from the accretion disc by a hot corona of electrons. This ...
    • Delayed Shock-induced Dust Formation in the Dense Circumstellar Shell Surrounding the Type IIn Supernova SN 2010jl 

      Sarangi, Arkaprabha; Dwek, Eli; Arendt, Richard G. (IOP Science, 2018)
      The light curves of Type IIn supernovae are dominated by the radiative energy released through the interaction of the supernova shock waves with their dense circumstellar medium (CSM). The ultraluminous Type IIn supernova ...
    • Detection and reactivity of Titan tholins in liquid hydrocarbons containing polar compounds 

      Dzurilla, Katherine; Mvondo, Delphine Nna; Mège, Daniel; Chevrier, Vincent (EPSC, 2019-09)
      Tholins are complex organic materials produced via photolysis of methane and dinitrogen gases in Titan’s upper atmosphere. These long-chained hydrocarbons sediment to the moon surface and interact with liquid hydrocarbons ...
    • Detection of Propadiene on Titan 

      Lombardo, Nicholas A.; Nixon, Conor A.; Greathouse, Thomas K.; Bézard, Bruno; Jolly, Antoine; Vinatier, Sandrine; Teanby, Nicholas A.; Richter, Matthew J.; Irwin, Patrick J. G.; Coustenis, Athena; Flasar, F. Michael (The American Astronomical Society, 2019-08-20)
      The atmosphere of Titan, the largest moon of Saturn, is rich in organic molecules, and it has been suggested that the moon may serve as an analog for the pre-biotic Earth due to its highly reducing chemistry and existence ...
    • Detection of Superluminal Motion in the X-Ray Jet of M87 

      Snios, Bradford; Nulsen, Paul. E. J.; Kraft, Ralph P.; Cheung, C. C.; Meyer, Eileen T.; Forman, William R.; Jones, Christine; Murray, Stephen S. (The American Astronomical Society, 2019-06-26)
      Chandra HRC observations are investigated for evidence of proper motion and brightness changes in the X-ray jet of the nearby radio galaxy M87. Using images spanning 5 yr, proper motion is measured in the X-ray knot ...
    • Developing the Physical Understanding of Intermediate Polars: An X-Ray Study of TV Col and V2731 Oph 

      Oliveira, R. Lopes de; Mukai, K. (IOP Publishing, 2019-08-02)
      The X-rays in intermediate polars (IPs) originate in a compact region near the surface of a magnetic white dwarf (WD) and interact with the complex environment surrounding the emission region. Here we report a case study ...
    • Development of a Cherenkov Telescope for the Detection of Ultrahigh Energy Neutrinos with EUSO-SPB2 and POEMMA 

      Otte, A. Nepomuk; Gazda, Eliza; Judd, Eleanor; Krizmanic, John F.; Kutzenzov, Evgeny; Matamala, Oscar Romero; Reardon, Patrick J.; Wiencke, Lawrence (2019-07-20)
      The detection of astrophysical neutrinos by IceCube and the potential to constrain source models of ultra-high energy cosmic rays provide the motivation to develop instruments for the observation of neutrinos above 107 ...
    • Direct Measurement of the Cosmic-Ray Proton Spectrum from 50 GeV to 10 TeV with the Calorimetric Electron Telescope on the International Space Station 

      Adriani, O.; CALET Collaboration (American Physical Society, 2019-05-10)
      In this paper, we present the analysis and results of a direct measurement of the cosmic-ray proton spectrum with the CALET instrument onboard the International Space Station, including the detailed assessment of systematic ...
    • Discovery of the Galactic High-Mass Gamma-ray Binary 4FGL J1405.1-6119 

      Corbet, R. H. D.; Chomiuk, L.; Coe, M. J.; Coley, J. B.; Dubus, G.; Edwards, P. G.; Martin, P.; McBride, V. A.; Stevens, J.; Strader, J.; Townsend, L. J. (2019-08-28)
      We report the identification from multi-wavelength observations of the Fermi Large Area Telescope (LAT) source 4FGL J1405.1-6119 (= 3FGL J1405.4-6119) as a high-mass gamma-ray binary. Observations with the LAT show that ...
    • Energetic Particles of Cosmic Accelerators I: Galactic Accelerators 

      Venters, Tonia M.; Hamaguchi, Kenji; Brandt, Terri J.; Ajello, Marco; Blumer, Harsha; Briggs, Michael; Coppi, Paolo; D'Ammando, Filippo; Becker, Michaël De; Fields, Brian; Guiriec, Sylvain; Hewitt, John W.; Humensky, Brian; Hunter, Stanley D.; Li, Hui; Lien, Amy Y.; Longo, Francesco; Marcowith, Alexandre; McEnery, Julie; Ojha, Roopesh; Pavlidou, Vasiliki; Prescod-Weinstein, Chanda; Santander, Marcos; Tomsick, John A.; Wadiasingh, Zorawar; Walter, Roland (2019-03-11)
      The high-energy universe has revealed that energetic particles are ubiquitous in the cosmos and play a vital role in the cultivation of cosmic environments on all scales. Energetic particles in our own galaxy, galactic ...
    • Energetic Particles of Cosmic Accelerators II: Active Galactic Nuclei and Gamma-ray Bursts 

      Venters, Tonia M.; Guiriec, Sylvain; Lien, Amy Y.; Ajello, Marco; Brandt, Terri J.; Blumer, Harsha; Briggs, Michael; Coppi, Paolo; D'Ammando, Filippo; Fields, Brian; Finke, Justin; Fryer, Chris; Hamaguchi, Kenji; Harding, J. Patrick; Hewitt, John W.; Humensky, Brian; Hunter, Stanley D.; Li, Hui; Longo, Francesco; McEnery, Julie; Ojha, Roopesh; Pavlidou, Vasiliki; Petropoulou, Maria; Prescod-Weinstein, Chanda; Rani, Bindu; Santander, Marcos; Tomsick, John A.; Wadiasingh, Zorawar; Walter, Roland (2019-03-11)
      The high-energy universe has revealed that energetic particles are ubiquitous in the cosmos and play a vital role in the cultivation of cosmic environments on all scales. Though they play a key role in cultivating the ...
    • Ethane in Titan’s Stratosphere from Cassini CIRS Far- and Mid-infrared Spectra 

      Lombardo, Nicholas A.; Nixon, Conor A.; Sylvestre, Melody; Jennings, Donald E.; Teanby, Nicholas; Irwin, Patrick J. G.; Flasar, F. Michael (The American Astronomical Society, 2019-04-02)
      The Cassini Composite Infrared Spectrometer (CIRS) observed thermal emission in the far- and mid-infrared (from 10 to 1500 cm⁻¹), enabling spatiotemporal studies of ethane on Titan across the span of the Cassini mission ...
    • The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project 

      Porth, Oliver; Chatterjee, Koushik; Narayan, Ramesh (2019-04-11)
      Recent developments in compact object astrophysics, especially the discovery of merging neutron stars by LIGO, the imaging of the black hole in M87 by the Event Horizon Telescope (EHT) and high precision astrometry of the ...
    • Fabrication of a Hybrid Transition Edge Sensor Array for Lynx 

      Wassell, Edward; Adams, Joseph S.; Bandler, Simon R.; Chang, Meng-Ping; Chervenak, James A.; Datesman, Aaron M.; Eckart, Megan E.; Ewin, Audrey J.; Finkbeiner, Fred M.; Yoon Ha, Jong; Kelley, R.; Kilbourne, Caroline A.; Miniussi, Antoine R.; Porter, F.; Sadleir, John E.; Sakai, Kazuhiro; Smith, Stephen J.; Wakehan, Nicholas